CAMRT Radiography Practice Exam

What test is performed after the collimator light is adjusted?

1. Image quality assessment

2. Light field / beam congruency test

3. Radiation dose measurement

4. Patient positioning analysis

The correct answer is: Light field / beam congruency test

The light field/beam congruency test is essential after adjusting the collimator light to ensure that the light field accurately represents the area that will be exposed to radiation. This test verifies that the x-ray beam aligns perfectly with the visible light field projected by the collimator. Proper congruency is crucial for minimizing unnecessary radiation exposure to the patient and ensures that the area of interest is adequately covered during imaging. Conducting this test after collimator adjustments helps achieve optimal image quality while adhering to radiation safety standards. If the light field and the x-ray beam are not congruent, it could lead to critical regions being underexposed or unnecessary areas being exposed, potentially affecting diagnostic accuracy and patient safety. In contrast, image quality assessment, radiation dose measurement, and patient positioning analysis are important processes but are not directly linked to verifying collimator adjustments.