CAMRT Radiography Practice Exam

Spatial resolution increases as the size of what decreases?

1. PSP crystals

2. Laser beams

3. Monitor matrix

4. All of the above

The correct answer is: All of the above

Spatial resolution refers to the ability to distinguish between small objects that are close together in an image. As the size of various components decreases, the spatial resolution of an imaging system increases. When the size of the PSP crystals decreases, more crystals can fit into a given area, which allows for finer detail capture, thereby improving spatial resolution. Smaller crystals can respond to smaller details in the anatomy being imaged. In regard to laser beams, a smaller laser beam width can reduce the spot size that the beam illuminates on the imaging surface, which enhances the precision of image formation and improves spatial resolution. Finally, the monitor matrix, which defines the pixel density of the display, directly impacts how much detail can be represented. A higher number of smaller pixels (a finer matrix) allows for more details to be displayed clearly, also contributing to increased spatial resolution. As all these components work together, they collectively determine the spatial resolution of an imaging method, leading to the conclusion that when the size of PSP crystals, laser beam widths, and monitor matrix configurations all decrease, the spatial resolution increases correspondingly.