Question

Which of the following is an advantage of crossed grids?

1) There is low risk of grid cutoff
2) They are easily utilized in exams requiring tube angulations
3) They have a higher contrast improvement factor than parallel grids
4) They require lower patient dose

Answer 1

Crossed grids in medical imaging enhance image quality by having a higher contrast improvement factor than parallel grids, which is beneficial for obtaining more accurate diagnoses.

Step-by-step explanation:

The advantage of using crossed grids in medical imaging, particularly in X-ray radiography, is related to their ability to improve image quality. When comparing different types of grids, crossed grids have a specific advantage:

• They have a higher contrast improvement factor than parallel grids.

Crossed grids consist of two grid layers placed at right angles, enhancing the contrast of the radiographic image by absorbing more scattered radiation than single-layer grids. These grids are particularly useful in settings where higher image contrast is essential for accurate diagnosis. However, they do present some limitations, such as being more susceptible to grid cutoff when the X-ray tube is angled, and they usually require higher patient doses due to their higher absorption of X-rays.