Final answer:
The spatial resolution factors for CR include pixel size, matrix size, and bit depth, affecting the clarity and detail of the image. Magnification, on its own, does not enhance resolution; it simply enlarges the image. Wavelength and numerical aperture are two fundamental factors that affect resolution, with shorter wavelengths and higher numerical apertures providing better resolution.
Step-by-step explanation:
The question asks about the spatial resolution factors for Computed Radiography (CR). When discussing resolution, we refer to the measure of the number of pixels used to represent an image. Higher resolution indicates a greater number of pixels and, hence, more detailed images. The factors affecting the resolution in CR include:
- Pixel size: Smaller pixels yield higher resolution;
- Matrix size: A larger matrix size allows for more pixels, improving resolution;
- Bit depth: Greater bit depth allows for more levels of gray, enhancing the ability to distinguish between small variations in density, which can affect perceived resolution;
In addition to these, other factors such as exposure time, source-to-image distance (SID), object-to-image distance (OID), focal spot size, anode heel effect, and collimation also influence the spatial resolution indirectly.
Understanding Resolution
Resolution is often confused with magnification and contrast. Magnification enlarges the image but does not necessarily improve its clarity. Conversely, contrast is the difference in luminance or color that makes an object distinguishable. To improve resolution, we need to consider factors such as wavelength and numerical aperture. Shorter wavelengths are capable of resolving smaller details, and a lens with higher numerical aperture gathers more light, which enhances resolution.