Exposure Factors ( 5 relationships you need to know kVp, mA, s, Bucky, SID)

Exposure factors (kVp, mAs, Bucky, SID) and their relationship to the exposure measured at the image receptor are critical to achieving high quality x-ray imaging for all of your patients. We focus on each of these factors first in terms of overall importance and then in terms of the relationship to x-ray exposure.
This is the basis for our x-ray math for the Detector Exposure:
Exposure ~ kVp^5 (15% Rule)
Exposure ~ mA
Exposure ~ s
Exposure ~ 1/B
Exposure ~ 1/SID^2
We then solve for the effect of these factors on the time of an x-ray exposure as that is the most frequent way that the exposure is updated on an x-ray system.
Finally we look at some sample problems where we change one exposure factor at a time, maintain the exposure on the image receptor.

[@oswaldopadilla3128]

Your videos are a brightness(Density) in my dark world. I have my exit exam coming up followed by my ARRT boards. I don’t think I’ll pass but I know by watching your videos I’ll understand and improve thank you

[@HowRadiologyWorks]

Thanks for dropping the message, best of luck. Watch the videos and do practice problems and you should be good. I know it’s stressful learning all this new information.

[@lifewithnajam7908]

Very infomartive

[@HowRadiologyWorks]

Thanks that’s what we go for

[@VetSurgeonDrTunio-vs8te]

Informative

[@HowRadiologyWorks]

Thanks Vet surgeon

[@Alyssa-ui7bf]

Watching in hopes that I can get help at my new clinic! Preset techniques are way off and admittedly I’ve never been good at manual techniques (still somewhat new grad)

[@jessicamarie3105]

great video and also what was that random clip of the guy trying to get his jeans over his belly lolll

[@HowRadiologyWorks]

That was showing an example of larger patient that would require more penetrating beam

[@masonrichter9941]

Bro is kermit

[@HowRadiologyWorks]

I’ve heard that one before. Also on a Saturday after my MSU Spartans have played it’s not easy being green.

[@iatisamofficial9134]

Thank u sir very informative ❣️

[@HowRadiologyWorks]

Most welcome, thank you for dropping a note

[@15GeorgeM]

Very interesting content, Thanks for taking the time to explain. I do have a question if it is allowed. I have been increasingly disappointed with X-rays taken of my lower back that has extensive metal implants form L2 down, main problem is very poor visualization of the bone. In a recent flex extension set my Doctor asked for clear imaging of the Spinus process bones so any slight movement could be detected but no matter what we do with contrast they are not visible. Can the Radiographer change the settings to get better imaging of the bones?

[@HowRadiologyWorks]

Hi George , thanks for the comments. I try not to answer specific personal medical questions. In general imaging around metal can be very difficult as it is much more attenuating than surrounding tissue. Sorry I can’t be more helpful on this one.

[@bennychun1021]

excellent video, thanks so much

[@HowRadiologyWorks]

Thanks for dropping the comment

[@iatisamofficial9134]

Love from pak keep it up

[@HowRadiologyWorks]

Thanks for dropping the note

[@hornydaddy8617]

Your stretching your explanation unnecessarily.
Few intro then come to the point,i prefer sir.

[@HowRadiologyWorks]

Thanks for the feedback Horny Daddy. Others please let me know if they prefer less intro.

[@michael_nel]

@@HowRadiologyWorks I thought it was perfect. People can always bump up the playback speed. I've seen these concepts delivered over hour long lectures. You're doing great