Author Archives: Dennis Bowman

How much scatter is created from an AP chest x-ray?

Recently I attended a lecture where an educator’s student had held a CR cassette in front of his chest (he was wearing a full…

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How much can you over-radiate and still get a perfect image?

Without a phantom it is almost impossible to see how easy it is to over-radiate a patient and still have a perfect (or at…

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Off-Focus Radiation

This whole project began when we tried to prove if a patient should be shielded in the front or the back for a PA…

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The Problems of “Creeping mAs/Dose” in America

As this is my first blog, I decided to jump right in and tackle what I believe is one of the biggest problems in…

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Problems with Exposure Index (EI) Numbers

When Fuji first developed CR back in the early 80’s, they were also the first company to invent an Exposure Index (EI) number system.  As most…

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How to Properly Critique a Digital Image

We have had hundreds of digital equipment training hours at my hospital in the past 10 years, but in all of that I don’t…

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The Trouble with Post Processing “Collimation”

Post processing “collimation”, shuttering or cropping seemed to be one of the greatest features of digital radiography.  With our first CR unit we were…

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Grid Cut-Off in the Digital World

After years of wondering about it, sometimes noticing it and finally researching it, I’ve come to the conclusion that grid cut-off isn’t mentioned anymore…

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How much can you over-radiate and still get a perfect image?

I decided to write and post this blog on the same day I changed my current research on my website.  This subject is one of…

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Optimum kV for DR & CR Equipment

As soon as the film-screen combination was developed in our profession, there has been optimum kVs used for every body part.  Even when Rare…

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