CAMRT Radiography Practice Exam 2026 – Comprehensive Test Prep

In a mammography exam, critically assessing the source-to-image distance (SID) and the source-to-object distance (SOD) is essential for obtaining optimal imaging. The SID refers to the distance from the x-ray source to the image receptor, while the SOD is the distance from the x-ray source to the area of interest, which in this case is the breast.

Maintaining appropriate SID and SOD values is crucial because these distances influence the quality of the final image, including factors such as magnification, resolution, and radiation dose. A correct distance minimizes geometric blurring and ensures that the anatomical structures are well-defined, which is particularly important for the detection of small lesions or abnormalities in breast tissue.

While other factors such as kVp settings, patient age and anatomy, and breast density do play important roles in imaging protocols and dosimetry, the SID and SOD directly affect the geometric accuracy and overall clarity of the mammographic images. Adequate control of these distances enhances the effectiveness of the examination and ultimately contributes to better diagnostic outcomes.