Final answer:
Grid efficiency in radiology is affected by grid ratio, the number of lead strips per inch, and the amount of scatter transmitted through the grid; these factors work together to enhance image quality by reducing scatter radiation.
Step-by-step explanation:
The factors related to grid efficiency in radiology are critical for minimizing scatter radiation and thus improving image contrast. The grid ratio, which is the ratio of the height of the lead strips in the grid to the distance between them, influences efficiency because a higher ratio means less scatter reaches the detector. The number of lead strips per inch is another important aspect; more strips per inch can lead to more effective scatter radiation absorption, assuming they are adequately spaced. Lastly, the amount of scatter transmitted through the grid is a direct measure of the grid's performance, with less scatter transmission indicating higher efficiency.