Tag Archives: radiographer

5 Reasons One Would Change a Technique

There are only 5 reasons why a radiographer would change a technique (and 8 ways you could do it without using distance).  As the how’s are not nearly as interesting as the whys, we’ll start with why you would change a given technique.  Here are the 5 reasons: Increase kV,

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,

mAs = Dose

Today’s post will center on how the mAs you use is directly proportional to the dose you are giving your patients.  I could have just written “the dose the patient is getting” but I really want to make it clear that you the radiographer, or radiographer student, are the one setting

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 Earth screens came on the market in the early 80’s and the mAs was cut to one third (from 9 to 3 for example) the kV

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 taking badly collimated chest x-rays and then with a couple of mouse and key strokes turning in images that looked like we were the best collimating

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