What is the role of the ionization chambers in AEC systems?

The role of ionization chambers in Automatic Exposure Control (AEC) systems is to measure ionization levels and produce a current, which directly correlates to the amount of x-ray exposure received. When x-rays pass through the patient and into the ionization chamber, they ionize the gas within, creating charged particles. This ionization generates a measurable current that is proportional to the intensity of the x-rays absorbed.

As the current reaches a predetermined level, it signals the AEC system to terminate the exposure. This mechanism allows for precise control over the amount of radiation used, optimizing patient safety and image quality by ensuring that the proper dose is delivered according to the density of the tissues being imaged.

This understanding of the function of ionization chambers is crucial for comprehending how AEC systems operate, ensuring consistent image quality while minimizing unnecessary radiation exposure to the patient.