2022 Undergraduate Research Showcase


Differences in Dose and Scatter Radiation When Using a Grid Versus No Grid

Document Type

Student Presentation

Presentation Date


Faculty Sponsor

Natalie Mourant


The purpose of this experiment was to test the dose the radiologic technologist receives at various locations six feet from the patient's position due to scatter radiation. Additionally, the presence or absence of a grid was tested to see if it would affect the dose received. Radiographic grids are used to attenuate scattered x-rays to improve the quality of an image. The grids consist of alternating rows of parallel radiopaque strips and strips of either wood, plastic fiber, or aluminum which have a low attenuation. Twelve series of images were taken in various locations and different source to image distances (SID) to simulate the dose a technologist would receive when standing near or around an x-ray tube. The study concluded that of the positions we measured, the highest dose was utilizing a grid, when standing six feet away from the patient and 38 inches to the left of the x-ray tube during a cross table lumbar exam at a 40 inch SID. Lowering patient and technologist dose continues to be of importance as digital technology advancements continue to be made.

Null 1: There is not a significant difference in dose to the technologist when using a grid.

Null 2: There is not a significant difference in dose to the technologist at a 72 inch SID versus at a 40 inch SID.

This document is currently not available here.