Final answer:
Spatial resolution in digital radiography is affected by pixel size, matrix size, bit depth, focal spot size, collimation, and other factors that influence the creation of a clear and detailed image.
Step-by-step explanation:
Spatial Resolution Factors for Digital Radiography (DR)
The factors that affect spatial resolution in digital radiography (DR) include:
- Pixel size: Smaller pixels can capture a higher level of detail, improving resolution.
- Matrix size: The number of pixels in the image affects resolution; more pixels generally provide better resolution.
- Bit depth: The number of bits used to define each pixel's shade of gray; higher bit depth allows for more distinguishable gray shades and contributes to overall image quality.
- Focal spot size: Smaller focal spots lead to sharper images by reducing unsharpness.
- Anode heel effect: This can influence image sharpness across the field due to variation in X-ray intensity.
- Collimation: Proper collimation can limit the scatter radiation and enhance image contrast, indirectly affecting the resolution.
- Scatter control: Techniques like grids can be used to reduce scatter, improving image sharpness.
- Grid ratio: The ratio of the height of the lead strips to the distance between them in an anti-scatter grid; a higher grid ratio can improve image quality.
- Filtration: Using appropriate filtration to absorb low-energy photons that can degrade image quality.
Resolution, collimation, and other factors like those listed above are essential elements that ensure quality imaging in DR.