CAMRT Radiography Practice Exam

Which adjustment would improve image quality if an image appears underexposed?

1. Increase mAs

2. Decrease kVp

3. Change the SID

4. Adjust the grid

The correct answer is: Increase mAs

Increasing mAs (milliamperes per second) is an effective way to improve image quality when an image appears underexposed. Underexposure typically means that not enough radiation has reached the image receptor, resulting in a darker appearance that lacks detail and contrast. By increasing the mAs, you increase the amount of radiation exposure to the image receptor, which enhances the overall brightness and density of the image, making structures more visible and details more discernible. In digital radiography, adjustments to mAs can help achieve optimal image quality while maintaining the appropriate balance with patient safety in mind. However, it is vital to manage increases cautiously to avoid unnecessary radiation exposure to the patient. This option is particularly useful when assessing images that have not captured sufficient anatomical detail due to inadequate exposure levels. While altering kVp, changing the distance (SID), or adjusting the grid can influence image quality, increasing mAs directly addresses the issue of underexposure and is the most straightforward method to rectify this specific problem.