Spreadsheets are
for Accounting.

is for Shielding.

grayCAD enables advanced design and analysis of medical radiation shielding. Import a drawing. Place a radiation source. See required shielding. See expected dose rates. Generate beautiful reports. GrayCAD visualizes radiation.

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Gamma Basics Blog

"I found grayCAD

especially helpful given a dynamic planning process with multiple architectural and machine changes. Making changes was straightforward and made it so the shielding design wasn't a rate limiting factor in the project planning process.

"

-grayCAD User