What are the three things that control anode heel effect (AHE)? 1. COLLIMATION2. SID 3. anode angle

Ajouté : 2026-05-16

[00:00:00]Three things that control the visibility of AHE on x-ray. One, collimation, the most [clears throat] important one, which also affects patient dose, IR exposure, and contrast.

[00:00:11]We should be using collimation as the number one way to reduce PT dose.

[00:00:16]Open or decreased collimation, aka creating a larger field of view, will spread the light out more, making AHE less prevalent.

[00:00:29]Two, SID. Increasing SID will decrease AHE visibility.

[00:00:33]Think of a flashlight. As you increase SID, the ability to see the brightest area, umbra, versus the not as bright area, penumbra, decreased. Same thing applies to AHE.

[00:00:44]More distance will make it less apparent. Yay!

[00:00:47]Three, anode angle.

[00:00:49]In diagnostic radiography, our anode angle can be 7 to 20 degrees, with 12 degrees being the most common.

[00:00:56]Cool.

[00:00:58]Technically, if we could somehow break into the vacuum tube and swap the 12-degree anode out for a different angled anode, we could change the AHE.

[00:01:14]But, we can't. So, this one is dumb.