ARRT Fluoroscopy Practice Exam

These questions are part of the practice quiz. Start practicing

• As photon energy increases, what generally happens?
• What feature contributes to the brightness measurements in veiling glare assessment?
• What is another name for coherent scatter?
• What is a disadvantage of using indirect capture systems?
• What conditions are ideal for a reading room in a radiology setting?
• What is a key benefit of keeping the image intensifier close to the patient during procedures?
• What is defined as the amount of x-rays produced, directly proportional to mAs?
• How is 'death' categorized in the context of sentinel events?
• What factor decreases spatial resolution (SR) in imaging?
• When comparing DQE of Am-Si with Am-Se, what is the advantage of Am-Se?
• True or False: Cancer is not seen below 0.05 Gy in any gestational period.
• What would be an example of an adverse patient event related to imaging procedures?
• What is the highest mA possible for a small focal spot?
• How is remote-controlled fluoroscopy typically accomplished?
• After a higher dose procedure of 10 Gy+, when can skin effects typically show up?
• What is the relationship between Rad and Gray?
• What is produced as a result of photoelectric absorption?
• True or False: At doses up to 5 Gy, epilation and erythema will not recover back to normal.
• What is the annual limit for lens exposure in mRem?
• What is the standard lead thickness for protective drapes used in fluoroscopy?
• What are cones and cylinders in fluoroscopy primarily used for?
• What occurs inside the tube when high magnification mode is utilized?
• What is focal decentering in relation to grid usage?
• How is the equation for calculating REM expressed?
• What impact can retrograde light flow have on imaging?
• What is the primary function of CsI in digital imaging systems?
• What type of radiation has an impact on genetic material?
• What characterizes an acute radiation dose?
• What should be avoided to reduce skin burn during fluoroscopy?
• What happens in the gastrointestinal (GI) syndrome caused by radiation?
• What is the SI unit for measuring radiation absorbed dose?
• What part of the image intensifier accelerates the electrons?
• What does a higher grid frequency imply about an imaging technique?
• What is the primary benefit of adjusting the focal spot distance with lateral decentering?
• What does the term "penumbra" refer to in radiology?
• What is the function of beam restrictors in fluoroscopy?
• When are prompt somatic effects most likely to be observed?
• What is essential to determine prior to conducting a contrast detail test?
• What does a higher penumbra in fixed fields indicate?
• What does the Dose Area Product (DAP) measure?
• What is the primary purpose of composite filters?
• What happens when visible light hits the photocathode?
• What does Air Kerma measure?
• What is the role of shielding in radiation protection?
• What component does Automatic Brightness Control (ABC) utilize to adjust imaging parameters?
• What effect does patient motion have on spatial resolution?
• What is the formula for magnification?
• Why is CNR preferred over SNR in imaging quality assessment?
• What does kilovolt peak (kVp) control in radiographic imaging?
• What feature of the image intensifier is responsible for inverting the image?
• What is the maximum dose threshold to consider a prolonged exposure as a radiation sentinel event?
• What measurement is commonly used to express the quality of an image in radiography?
• As the grid ratio increases, what happens to the technique needed?
• What is the primary source of free electrons in an X-ray tube?
• Which type of radiation exposure can lead to both immediate and long-term health effects?
• What is the organ dose limit for radiation exposure?
• Which dose range is considered lethal with no treatment for radiation exposure?
• Which type of light is primarily detected by cones in the retina?
• The radiation weighting factor (Wr) accounts for what aspect of radiation?
• Which of the following best describes the absorption measurement of radiation?
• What are portable grid caps primarily designed for?
• What is the grid ratio formula?
• What is a characteristic of low-Z materials in composite filters?
• What is an acceptable x-ray field alignment in relation to the image receptor?
• What can dead pixels in an imaging system appear as?
• What pattern do linear grids use?
• Absorbed dose is measured in which of the following units?
• What material is primarily used in a direct conversion system?
• In the context of radiation, what is significant about the term 'stochastic'?
• How do you perform a spatial resolution test on fluoroscopy?
• What is retinopathy characterized by?
• In a histogram, what does the y-axis indicate?
• According to the Bergonie-Tribondeau law, which types of cells are more sensitive to radiation?
• When should the timer in a fluoroscopy system make an audible noise?
• What is the rule of 15 applicable to in radiography?
• What is the ring badge limit for radiation exposure?
• What is the primary purpose of using grids in imaging?
• What effect does widening the window in fluoroscopy have on image contrast?
• What types of artifacts can arise from the proper use of a grid?
• What does the weighting factor (Wr) in the equation for REM represent?
• What is the typical size of a small focal spot?
• What characteristic is associated with a non-linear graph in radiation dose response?
• Total filtration is equivalent to the half-value layer (HVL). True or False?
• What is the equation for the bucky factor?
• Which type of exposure limit is set at 5000 mRem?
• The NCRP rule of thumb for HVL states that at 70 kVp, it should be greater than:
• What occurs to the energy of electrons as they are accelerated towards the output phosphor?
• What is the typical radiation dose comparison for cinefluoroscopy versus normal fluoroscopy?
• What is the primary purpose of lead shielding in radiology?
• How many magnification modes can a 16" image intensifier have?
• What does SOD stand for?
• What commonly causes broken grids in fluoroscopy?
• What type of events can lead to the classification of a radiation sentinel event?
• What happens to contrast resolution when there are fewer gray levels available?
• For which equipment are cones/cylinders primarily utilized?
• What is the equation for calculating the S-value?
• What is the permitted deviance of the x-ray field image on screen?
• What is the primary function of magnification modes in fluoroscopy?
• What is the fetal dose threshold below which there is no evidence of increased incidence of developmental effects?
• What is the equivalent measure for REM in the SI system?
• What is a disadvantage of larger focal spots?
• What does sampling frequency refer to in imaging modalities?
• What is a potential consequence of an improperly set focal spot in high mag mode?
• What are limitations of moving grids during imaging?
• What type of charge does the focusing cup have in an X-ray tube?
• Which exposure system is utilized for individual exposures and cine runs?
• What is the function of a grid-controlled tube in pulsed fluoroscopy?
• What does milliampere (mA) measure?
• What phenomenon is described by random fluctuations of signal often caused by low x-ray dose to the detector?
• What is the typical angle for the anode according to the line focus principle?
• Which material is most commonly used for filters in fluoroscopy?
• What are stochastic effects in radiation exposure?
• What is the primary effect of collapse of the circulatory system and fluid collection in the brain?
• How is noise represented in imaging analysis?
• What do composite filters consist of in terms of materials?
• What contributes to stray light in fluoroscopy?
• What effect does veiling glare have on an image?
• Which of the following best describes the risk associated with stochastic effects?
• What can happen if the mA is set too high during the use of moving grids?
• What type of imaging does a standard spot film utilize?
• What is the result of using lead strips angled toward the focal spot in a grid?
• Iris/diaphragm collimators are typically used for:
• What skin effect may occur if a patient receives 20 Gy to their skin?
• What is the Nyquist frequency in relation to CR/DR sampling?
• What operational characteristic does veiling glare primarily affect?
• What specific factor contributes to the risk of cancer in stochastic effects of radiation?
• How does increasing kVp affect the quality of the x-ray beam?
• At what fetal dose range is there a low risk of congenital malformations and childhood cancer?
• What does an increase in mAs indicate about the quantity of x-rays produced?
• What is the main function of the photocathode in an image intensifier?
• What type of genetic effects can radiation cause?
• What is the primary material used to construct the output phosphor?
• Where should the image intensifier (II) be positioned in relation to the patient?
• What effect does increasing the number of bits have on image quality?
• What is the minimum source-to-surface distance (SSD) for a stationary unit?
• What component of the image intensifier is characterized as flat?
• What is the minimum source-to-skin distance (SSD) for stationary fluoroscopic units?
• Which of the following is NOT a method of radiation protection?
• What is the likelihood of coherent scatter occurring?
• To achieve optimal density on the radiographic image, which parameters might need adjustment?
• What constitutes the eye dose equivalent?
• What does the accelerating anode do in an image intensifier?
• What is the annual dose limit for radiation workers?
• Which of the following materials is NOT typically used as a filter in fluoroscopy?
• What does lateral decentering result in during imaging?
• What are the most commonly used materials for filtration in fluoroscopy?
• Which of the following is classified as a prompt somatic effect?
• What is the impact of sampling at less than 2x the grid frequency in CR/DR?
• Which term is synonymous with AEC in radiographic imaging?
• What is a characteristic of a non-focused grid?
• How does an increased grid ratio affect image quality?
• Which organ is known to receive the highest dose of radiation exposure?
• In imaging systems, what color usually indicates the total area?
• What condition results from loss of transparency of the lens of the eye?
• Which factor does NOT typically determine the exposure time in fluoroscopy?
• What does remnant radiation refer to?
• Which factors influence photoelectric interaction?
• When comparing DQE of Am-Si with Am-Se, Am-Si is noted to have what advantage?
• The information contained in a Hospital Information System (HIS) is essential for what primary purpose?
• Why is indirect capture preferred in digital imaging systems?
• What is extinction time related to in fluoroscopic procedures?
• What is the minimum lead shielding requirement for dental units?
• Which factor can help to eliminate moire artifacts?
• Which of the following statements is true regarding filtration?
• What magnification modes are available if you have a 16" image intensifier?
• What is indicated when images appear wavy on a fluoroscopic exam?
• What happens to the intensity of radiation as filtration increases?
• Where do genetic effects of radiation primarily occur?
• What is the minimum source-to-skin distance (SSD) required for mobile fluoroscopic units?
• What is the typical grid ratio used for fluoroscopy?
• What is a common application of focused grids in fluoroscopy?
• Which of the following is indicative of somatic effects?
• Where does the primary x-ray beam originate?
• What does the term 'hormesis' refer to in radiation exposure?
• What is a common use for a wedge filter?
• Which of the following interactions primarily occur in the x-ray tube?
• What is the main composition of the cathode filament in an X-ray tube?
• How does the use of magnification impact radiation exposure?
• How do magnification modes achieve enhanced image quality?
• What artifacts may occur from using a focal grid incorrectly?
• What is meant by a non-threshold dose-response relationship?
• Which of the following describes the primary role of kVp in radiography?
• Which factor primarily contributes to film noise?
• What is the primary function of wedge filters in fluoroscopy?
• What does binning do in imaging technology?
• What type of radiation does bremsstrahlung refer to?
• What is the primary issue that occurs when the intestinal lining is damaged in GI syndrome?
• What is the preferred distance to reduce magnification?
• What does a linear graph represent in terms of dose-response?
• What is a primary source of veiling glare in fluoroscopic imaging?
• What is the recommended dose limit for an embryo during radiation exposure?
• What is a significant effect of using CsI in fluoroscopy?
• What is the interspace material commonly made of in a grid?
• What is the risk of developing cancer in pediatric patients from radiation exposure?
• What typically happens to an x-ray during coherent scatter?
• What role does Am-Si play in the imaging process?
• Which syndrome is characterized by destruction of bone marrow leading to immune system failure?
• What happens to particles when they possess high kinetic energy?
• Why do we prefer radiography systems with more bits?
• What is the effect of increased filtration in fluoroscopy?
• What is the minimum lead thickness required for fluoroscopy drapes?
• What is the ACR standard for room illuminance?
• What happens when the beam is not properly centered on a grid?
• What generally happens to radiation dose as the S-value increases?
• What is "effective dose" in the context of radiation exposure?
• What is the primary purpose of beam restriction in fluoroscopy?
• What is the formula for calculating the contrast to noise ratio (CNR)?
• Which parts of the image intensifier are typically curved?
• In additional to standard lead thickness, what does NCRP recommend for protective eyewear?
• What is the thickness of CsI used in image intensification?
• What is the recommended dose limit for radiation exposure after 16 weeks of conception?
• What type of grid is best described by the use of parallel lead strips?
• What is the minimum length for an exposure cable on a mobile device?
• When comparing fluoroscopy and digital spot films, which delivers a higher radiation dose?
• How can high fill factor impact image quality?
• What is the minimum lead shielding required for staff in a radiographic area?
• What type of capture system do digital flat panel fluoro systems employ?
• Which of the following describes the effect of filtration on x-ray beam quality?
• What is the lead thickness of a bucky slot cover?
• What is the relationship between electron proximity to the nucleus and energy loss?
• What does low randomness imply in terms of imaging noise?
• Which type of focal spot is typically preferred for hand radiography?
• What aspect of radiation exposure risk increases with dose but does not depend on the severity of the effect?
• What effect does increasing the thickness of tissue have on attenuation?
• Which type of grid is suitable for long SID shots and portable devices?
• Which statement is true regarding cine and angio systems?
• What is the focal spot in radiography?
• What is the purpose of a wedge filter in radiation therapy?
• How many electrons are in 1 Coulomb?
• What role does the input phosphor play in the image intensifier?
• What does the term 'bucky factor' refer to?
• What is the primary outcome of bremsstrahlung interaction?
• Which of the following describes a typical digital imaging artifact?
• As filtration increases, the number of low-energy x-rays in the beam will:
• What does kVp control in fluoroscopy?
• In relation to DAP, what does the formula DAP Rad cm² = dose x area irradiated represent?
• What is the minimum lead shielding recommended for patient protection?
• What is absorbed dose also known as?
• What does a lower standard deviation in imaging indicate about noise?
• What effect does halation have on imaging?
• What happens to TLD crystals as exposure increases?
• What is unique about the spot film camera in fluoroscopy?
• What is flawed gain calibration?
• How is 1 ampere defined in terms of coulombs?
• What does LET stand for in the context of radiation?
• In which units is the equivalent dose or organ dose measured?
• What is the typical dynamic range of the human eye in terms of brightness perception?
• How thick is the interspace material in grids?
• In which direction are electrons accelerated in an X-ray tube?
• Which types of collimators can be used in fluoroscopy?
• For which of the following is a dead man's switch most relevant?
• Which grid ratio is typically used for fluoroscopy?
• What does REM stand for in radiation terminology?
• At which stage of gestation is the risk of childhood cancer maximized due to radiation exposure?
• What are the federal regulations for manual systems in fluoroscopy?
• What material is contained in a TLD dosimeter?
• What does attenuation refer to in the context of x-ray beams?
• Under what conditions can cumulative dose be considered a sentinel event?
• Which material is known for excellent light pipes reducing lateral light diffusion?
• What does SID stand for?
• What is lag in radiology imaging?
• What are somatic effects of radiation?
• What is the thickness of lead in grids?
• What is considered a high fill factor percentage for better signal quality?
• What is a significant drawback when using a crossed grid?
• Which dosimeter emits light as part of its function?
• What is the recommended positioning for the image receptor during fluoroscopic procedures?
• What is the effect of increasing filtration on penetration and dose savings?
• What is one example of a delayed somatic effect from radiation exposure?
• What happens when x-rays strike the input phosphor?
• What type of vision is primarily associated with rods in the human eye?
• What types of information does a Hospital Information System (HIS) typically hold?
• What are stochastic effects in the context of radiation exposure?
• What are the two main modes of DNA damage due to radiation?
• What factors does the contrast improvement factor (k) depend on?
• What is the fetal dose limit for radiation exposure?
• Which of the following is true regarding the biological effects of radiation?
• What type of material is used in an OSL dosimeter?
• How far can the tube be placed in some remote control setups in fluoroscopy?
• What is a potential result of having high pixel density in digital imaging?
• What kind of x-ray interaction involves a complete transfer of energy?
• Which lighting condition is preferred for a viewbox in diagnostic imaging?
• Which option best describes the significance of a high contrast to noise ratio?
• What does carcinogenesis refer to?
• What is the typical range of kilovolt peak (kVp) that can be used in an x-ray tube?
• What is a characteristic of scotopic vision?
• What is the primary effect of increasing both kVp and filtration on the x-ray beam?
• What is the typical bit depth in most radiography systems?
• What occurs during kV override in a fluoroscopy system?
• Which method is NOT effective in reducing scatter radiation?
• What describes the dynamic range of the human eye?
• What does the milliampere-seconds (mAs) control in radiography?
• For general diagnostic tubes, the minimum total filtration required is?
• What does the Gray Scale Display Function (GSDF) standardize?
• How does the image quality of spot film shots compare to regular fluoroscopy?
• Where are exit detectors typically located in a fluoroscopy system?
• What is the disadvantage of an upside down focused grid?
• Which protective measure involves using distances that minimize exposure?
• What does Automatic Exposure Control (AEC) primarily control?
• In the direct mode of DNA damage, what occurs?
• Why were red goggles utilized by physicians in early fluoroscopy systems?
• How many milliamperes are in one ampere?
• In fluoroscopy, which exposure systems are commonly utilized?
• What is the primary benefit of using Automatic Exposure Control (AEC) in radiography?
• When is it necessary to use a dosimeter badge?
• What happens to the dose when the grid ratio increases?
• What is the SID range for a low grid ratio of 5:1?
• What does detective quantum efficiency (DQE) measure?
• What thickness of lead is recommended for gonadal shielding?
• What describes chronic radiation dose?
• What is leakage radiation?
• What is the dose associated with transient erythema from radiation exposure?
• What is the typical diameter of the output phosphor in an image intensifier?
• What feature does a grid-controlled tube include?
• What is the purpose of counting the number of visible holes per column in the contrast detail test?
• If the grid ratio is increased, what happens to the bucky factor?
• What is the outcome of using an off-angled grid?
• What does NCRP 102 expect regarding lead shields?
• What is a characteristic of random grid motion in fluoroscopy systems?
• What defines the true focal spot?
• How is the grid line per inch calculated?
• What is the primary use of CNR in imaging?
• What happens when the size of the DEL (pixel) decreases?
• Which condition is an example of delayed somatic effects from radiation exposure?
• Why is it necessary for the image intensifier to function as a vacuum?
• What are the main components of an image intensifier?
• What methods can be employed to make a spot film?
• What does ROI stand for?
• What is considered a slow frame rate in pulsed fluoroscopy?
• What is the lead thickness required for shielding in fluoroscopy according to general standards?
• What is a benefit of using the focusing lens in an image intensifier?
• What is the primary effect of acute radiation syndrome on the body?
• What is the role of the focusing cup in radiography?
• How does a dosimeter indicate radiation exposure?
• In imaging systems, what colored area typically represents the active detector?
• Which of the following fetal doses is associated with a high risk of developing congenital malformations and other serious outcomes?
• What is the attenuation standard for tabletop distances at 100 kVp?
• What is the effective focal spot?
• What does pulsed fluoroscopy achieve?
• In indirect capture imaging, how are the elements arranged?
• What types of interactions take place within the human body during x-ray imaging?
• What does the inverse square law state about the intensity of radiation as distance increases?
• What is the result of an outer shell electron taking the place of an inner shell electron following photoelectric absorption?
• What is the readout speed of modern fluoroscopy systems that use digital detectors?
• How does the use of automatic brightness control (ABC) relate to magnification modes?
• What effect does increasing KeV have on the chance of Compton scattering?
• What is a spot film in the context of fluoroscopy?
• Which processes contribute to secondary radiation?
• What characterizes photoelectric absorption?
• What is the initial setup for lead apron attenuation testing?
• Does coherent scatter result in patient dose?
• What damage occurs in glaucoma?
• What is the NCRP recommended lead shielding for gonadal protection?
• What aspect of fluoroscopy contributes to scatter radiation?
• What is the unit for electronic charge traveling per second?
• When using linear grids, what is the outcome of angling the tube?
• What is the function of the last image hold feature in fluoroscopy?
• What is the digital subtraction process used for in fluoroscopy?
• What does "deep dose equivalent" refer to?
• What does a film dosimeter measure?
• Which of the following represents one of the principles of ALARA in radiation protection?
• In the indirect mode of DNA damage, what is often created that affects the DNA?
• At what time interval will the fluoro timer typically go off?
• What is the regulation for the x-ray field to image on screen?
• In what situations is a small focal spot typically used?
• What does the Fuji S-value indicate regarding film speed in relation to exposure?
• What does high randomness in signal processing indicate?
• What consequence does decreasing the field size from 16" to 4.5" have in fluoroscopy?
• What is the threshold dose for cataracts caused by radiation?
• How bright should a view box ideally be for optimal imaging?
• In C-arms/IR systems, what is the specified distance from the detector to the image intensifier (II)?
• What is the regulation for moving tables in fluoroscopy?
• In what unit is fluoro time measured?
• What type of imaging distortion does pincushion artifact represent?
• What is the length of the CsI crystals?
• In adults, what is the statistical risk percentage of developing cancer from radiation exposure?
• What does a crossed grid effectively clean up?
• What system is used for adjusting the brightness of the television output in fluoroscopy?
• How does Automatic Brightness Control (ABC) operate?
• What feature can effectively decrease noise in radiographic images?
• What is the aliasing/corduroy/moiré artifact?
• In the equation for frequency and wavelength, what does "c" represent?
• When analyzing a histogram, what does the gray level relate to?
• What does LD 50/30 refer to in terms of radiation exposure?
• What is the detector distance for over-table tubes?
• How many possibilities are there in one byte?
• What is the typical rate of data transfer and image display in digital radiography (DR) flat panel fluoroscopy?
• What type of filters are used to manage varying thickness in radiotherapy?
• In terms of image quality, what does an increase in SNR indicate?
• What happens during the interrogation time of a fluoroscopy procedure?
• Why do we use larger focal spots in radiography?
• For eye protection, what is the minimum lead thickness recommended by the NCRP?
• How does increased filtration affect image contrast?
• What is considered a major source of scatter radiation?
• The effect of filtration in fluoroscopy primarily leads to an increase in:
• How is CsI (cesium iodide) fabricated?
• What type of somatic effects occur immediately after radiation exposure?
• What happens when electrons have difficulty directing to the periphery during imaging?
• What does the SI unit C/kg measure in the context of radiation?
• What is interrogation time in the context of fluoroscopy?
• What percentage of the interactions during bremsstrahlung generates X-rays?
• How is the shallow dose equivalent defined?
• In imaging, what is the effect of reducing SOD?
• What can cause broken grids?
• What does the level control affect in fluoroscopic imaging?
• What does dynamic range describe in imaging?
• What is one of the primary functions of a Radiology Information System (RIS)?
• What is one function of composite filters in fluoroscopy?
• What factor influences the probability of Compton scattering occurrence?
• What dose level is associated with transient epilation due to radiation?
• What function does the inner badge serve in dosimetry measurements?
• Which grid type consists of two sets of parallel lead strips?
• What defines a sentinel event in a healthcare context?
• What are the two main ways characteristic interactions occur?
• Which organic compounds can be utilized in the construction of grids?
• For under-table tubes, what is the required distance from the image intensifier to the tabletop?
• In the context of x-ray imaging, what does the term "quality" refer to?
• What is the lead thickness of the side shields typically provided with lead glasses in the industry?
• What is the maximum allowable radiation exposure for personnel according to federal regulations during manual operation?
• What occurs during the Compton effect?
• Which of the following is not a reason for needing a dosimeter?
• What happens to electrons that are closer to the nucleus during bremsstrahlung interaction?
• What is the ratio of line pairs to pixels in imaging?
• What is the lead thickness recommended for bucky systems?
• What happens when Automatic Brightness Control (ABC) maxes out?
• What type of grids are designed to match the divergence of the X-ray beam?
• Which types of particles are identified as having high linear energy transfer (LET)?
• What does the term 'window' refer to in fluoroscopy technology?
• According to NCRP standards, what is the lead thickness required for protective aprons?
• What is the approximate risk of developing cancer in adults due to radiation exposure?
• On a histogram, what does the x-axis represent?
• How is the radiation absorbed dose (Rad) defined?
• Which components within AEC assist in producing +/- ions when x-rays are detected?
• What occurs when there are fewer gray levels in an image?
• Why are aluminum and air preferred as interspace materials for grids?
• What is the relationship between DQE and MTF?
• Which of the following factors influence radiosensitivity?
• What describes a pincushion artifact?
• What is a consequence of internal bleeding in acute radiation syndrome?
• Which form of radiation does lead shielding primarily protect against?
• What is the photocathode made of?
• In an image intensifier, what is the role of the focusing lens?
• What happens to a film dosimeter as radiation exposure increases?
• What equation is used to determine the dose in fluoroscopy?
• What is the standard SID range for a high grid ratio of 16:1?
• How does higher bit depth affect the depiction of shades in an image?
• What is the term for the radiation exposure level considered to cause acute radiation syndrome (LD50) in humans?
• What aspect of imaging does the Gray Scale Display Function aim to improve?
• What component is used to focus electrons in an X-ray tube?
• What is the federal regulation maximum control speed for high level control systems?
• How does faster film speed affect the amount of noise present in the image?
• For NCRP 102, what is the rule of thumb for total filtration in fluoroscopy?
• What is the main concern with higher doses of radiation in a fluoroscopic procedure?
• Why is an air kerma meter inadequate for determining a sentinel event?
• What type of effects are associated with long-term exposure to radiation?
• What does it mean if more photons are needed to decrease noise?
• According to NCRP 102, what percentage of x-rays should be attenuated by lead shielding?
• What is the thickness of the lead strips commonly used in grids?
• Which statement is true regarding magnification in radiography?
• What occurs when electrons hit the output phosphor?
• According to NCRP 102, what is the minimum HVL at 70 kVp?
• Which of the following best describes veiling glare in fluoroscopy?
• What is the extremities dose limit for radiation exposure?
• What is grid frequency in imaging?
• What is the minimal dose reported, designated as (M)?
• What does ABC stand for in fluoroscopic imaging?
• What does Automatic Exposure Rate Control (AERC) primarily use instead of a brightness sensor?
• How is luminance defined?
• Which equation is used to calculate energy in relation to frequency?
• What is the significance of high detective quantum efficiency?
• What happens to tissue interactions as the energy of photons increases?
• Which of the following statements aligns with a threshold dose-response relationship?
• In the context of imaging, what does "signal" refer to?
• Which statement is true about saturation in imaging?
• Which of the following is NOT a technique mode available in fluoroscopy?
• What is the consequence of photoelectron collisions with air inside the image intensifier?
• What is the eye dose limit for radiation exposure?
• What occurs after Am-Si converts light into electrons?
• What is the highest mA possible for larger focal spots?
• What defines the veiling glare phenomenon in terms of light sources?
• What happens when more bits are included in imaging?
• What is a characteristic of moving grids in fluoroscopy?
• How is the contrast improvement factor (k) determined?
• What materials are commonly used as interspace materials in grids?
• Which of the following is a skin effect associated with high-dose radiation therapy?
• What role does the nucleus play in the deceleration of electrons?
• What is primary radiation?
• What does illuminance measure?
• Which of the following is categorized as a radiation sentinel event?
• What is the equation for absorbed energy?
• What are the air kerma units for measuring dose?
• What is another term commonly used to describe inherent detector noise?
• What is the risk of developing cancer during the fetal stage due to radiation exposure?
• Which of the following factors can lead to increased visibility of noise on radiographic films?
• What is vignetting in imaging systems?
• Which characteristic does not represent a property of x-rays?
• What happens to resolution when we increase magnification?
• What is the effect of increased mAs on the radiation dose to a patient?
• What is the purpose of creating a mask image during the digital subtraction process?
• What is the equation for the line focus principle?
• What is the equation for calculating grid ratio?
• Why do magnification modes result in increased radiation dose?
• What causes S-distorsion in imaging?
• What can occur with radiation doses higher than 5 Gy?
• What benefit is achieved by using digital fluoro detectors?
• Which action should be taken if a patient receives multiple high dose exams within a short period?
• Why is dose spreading important in the context of radiation exposure?
• Which of the following is a goal for improving dynamic range in imaging?
• Which of the following techniques effectively reduces scatter radiation?
• Why is CsI preferred over ZnCdS?
• What characteristic is unique to digital spot imaging compared to traditional fluoroscopy?
• Increasing the kVp by 15% or 10 kVp allows for what adjustment in mAs?
• What does the concept of wave-particle duality in radiation imply?
• What thickness of lead should be used for eye shielding according to NCRP 102?
• Which description best fits a focused grid?
• If the S-value equals 100, what can be inferred about the exposure?
• In a given exposure, which body equivalent is assessed and reported?
• How is retrograde light flow prevented inside the image intensifier?
• What is cinefluoroscopy primarily used for?
• How is veiling glare measured in fluoroscopy?
• What material constitutes the majority of the cathode in an X-ray tube?
• What happens when intensifying screens are used?
• What happens to gridlines in stationary and moving grids?
• What is the role of the ionization chambers in AEC systems?
• What does HL7 stand for in the context of healthcare?
• What is the typical thickness of interspace material in grids?
• What does mAs primarily control in radiography?
• What is a key factor to consider in the use of grids for imaging?
• What lead thickness do industries typically provide for lead glasses?
• What is the purpose of air gaps in imaging?
• In what direction are lead strips oriented in a focused grid?
• How is a look-up table represented in imaging?
• What happens to the image during the process of image intensification?
• Which of the following is NOT typically a type of eye damage from radiation?
• What is the primary function of the image intensifier in fluoroscopy?
• What is the annual limit for exposure to extremities in mRem?
• What is the first step in performing a contrast detail test on fluoroscopy?
• What is AERC an acronym for in radiographic technology?
• What change occurs to the focal spot when using high mag mode?
• What does the SMPTE pattern represent in imaging?
• What is the typical size for a large fluoroscopic spot film?
• What is the purpose of using grids in fluoroscopy?
• Which factor does NOT relate to the concept of tissue weighting factors?
• What does the term "linear nonthreshold" imply about radiation exposure?
• How does AEC function in radiography?
• When should a discrepancy in the air kerma meter readings be investigated?
• What is the annual whole body dose limit in millirems (mRem)?
• What material is NOT typically used for interspace in grids?
• Which of the following is an example of a prompt somatic effect?
• What does the attenuation equation I= Io e^ (-ux) represent?
• In what direction are the strips of the grid oriented?
• What is the maximum allowable level for secondary radiation at 1 meter?
• Which of the following contributes to quantum mottle in imaging?
• What is the input phosphor made of?
• In fluroscopy, what can be adjusted to mitigate effects of saturation?
• What effect does an improper calibration of a detector cause?
• Which part of an AEC system attracts the ions to generate current?
• What does ’foreign object retention’ signify in patient safety?
• What is the relationship of radiation weighting factor (Wr) to the relative biological effectiveness (RBE)?
• What is the thickness range of the output phosphor to maintain image resolution?
• Which of the following describes a significant symptom of bone marrow syndrome?
• Which factor does NOT affect spatial resolution in imaging?
• Which interaction does not contribute to patient dose?
• What is one of the fundamental properties of x-rays?
• In a TLD dosimeter, what does exposure to radiation correlate with?
• What could long-term background radiation exposure typically lead to?
• What is the maximum occupational exposure limit?
• What is one reason why children have a higher risk of developing cancer from radiation exposure compared to adults?
• What type of vision is more efficient in bright conditions?
• How is the fill factor defined?
• What does the concept of phototiming involve in radiographic techniques?
• What is the method for measuring primary transmission with a grid?
• What does a higher bucky factor indicate?
• What phenomenon describes the appearance of little lines due to lead strips in fluoroscopy?
• How is spot filming typically performed in fluoroscopy?