In C-arms/IR systems, what is the specified distance from the detector to the image intensifier (II)?

In C-arms and interventional radiology (IR) systems, the specified distance from the detector to the image intensifier (II) is typically set at 30 cm. This distance is crucial for optimizing image quality while balancing radiation exposure.

The image intensifier amplifies the incoming x-ray image, turning it into a more manageable light signal that can be viewed on a monitor. Maintaining this specified distance allows for a sufficient field of view and minimizes distortion, ensuring that the images produced are of high quality. Additionally, this distance is an ergonomic design consideration that aids in the usability of the C-arm during various procedures.

Other distances, such as 20 cm, 25 cm, or 35 cm, may not align with typical operational standards in fluoroscopy settings and could lead to compromised image quality or issues with radiation safety. Fairly consistent guidelines across different manufacturers and health organizations establish 30 cm as a standard, making it the most appropriate choice for this question.