Tag Archives: Exposure Index

iSupertech Digital X-Ray Calculator

Digital Radiography Solutions has combined forces with Judy McNitt-mell of Supertech and Ron Reed of Dev App Central, LLC to create the first ever app for digital radiography techniques.  It’s called the iSupertech Digital X-Ray Technique Calculator and can be downloaded and used on iPhones, iPods and iPads. At the

My Version of the Perfect Exposure Index (EI) System

The chart below is a system that Agfa has implemented with all of their new equipment. It’s a three color system with green being “within range’, yellow being “slightly over or under exposed” and red being “significantly over or under exposed”. I like that they took a stab at it,

The New Exposure Index (EI) Terminology

There are three new definitions all of the manufacturers are now using that will soon become standard terminology in our profession. The first and most important is that finally(!!) there will be only one name for the number that comes up after your exposure to show the measure ofthe radiation

How Low Can You Go?

This is how I teach ALARA (As Low As Reasonably Achievable) to all of my students and whenever I give any kind of talk on digital radiography techniques to students or techs.  It’s all about using the smallest/lowest mAs possible so that the dose is as low as it can

Universal CR & DR Technique Charts

Back in the film days I would always give my students a technique chart that had about 50 different body parts on it.  When we went digital in 2002, our vendor told to use the same techniques, so we continued to use those charts.  Four years later we had learned

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 because no one even knows it’s happening.  With film it was totally obvious because grid lines covered 50-100% of the image.  That is not the case

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 remember any time given in learning how to correctly critique the image.  I have to imagine this is the same with everyone around the country, possibly

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 of us know, they went with S numbers and decided to have those numbers correspond with the speed of film –screen systems so that the higher