Skip to main content

Can someone ELI5 what is optical density?

By

I’m sorry for asking such a basic question but I just don’t get. With regards to film-screen radiography and the characteristic curve, what is meant by optical density? I’ve googled it and I’m seeing stuff about absorbance and the degree of light intensity transmitted through a medium. But I still don’t get it in the context of radiology. Excluding the toe and shoulder of the characteristic curve, OD appears to be somewhat proportional to the kerma so the more photons passing on to the film, the higher the OD. But then how is OD a measure of how “absorbent” something is? Isn’t it the exact opposite of that?

submitted by /u/Bitsoft
[link] [comments]

source https://www.reddit.com/r/Radiology/comments/pf8bim/can_someone_eli5_what_is_optical_density/
Labels:

Comments

Post a Comment

Popular posts from this blog

Two teenage boys experimenting with magnetic balls.

By
submitted by /u/Funtimestic [link] [comments] source https://www.reddit.com/r/Radiology/comments/sqr6wc/two_teenage_boys_experimenting_with_magnetic_balls/
Post a Comment
Read more

Onetonline salary search change?

By
Did this change? I am having a hard time finding the same lists I saw 2 months ago. https://www.onetonline.org/link/summary/29-2034.00#AdditionalInformation https://www.onetonline.org/link/localwages/29-2034.00?st=OR&p=hourly I used to be able to see wage by area and sort it by state and see the differences per state and per city in every state. I can't seem to find this same list anymore. I can see a bell curve but I can't sort by state or wage or anything. Thanks! submitted by /u/xxDamnationxx [link] [comments] source https://www.reddit.com/r/Radiology/comments/h9oqup/onetonline_salary_search_change/
Post a Comment
Read more

Question regarding ultrasound

By
Hello radiologists, I have a quick question regarding ultrasounds of the scrotum. (Not asking for medical advice just wondering about something). I’ve done an ultrasound of the scrotum and the radiologist only took pictures of the right side of the testicle and then the left side but not in between so my question is, do ultrasounds show all “angles” of a testicle or does the device need to be held at various areas to show a full testicle? Because if only one side of the testicle is seen then wouldn’t the other side be as important in diagnosing something? Thanks! submitted by /u/doomyboomy [link] [comments] source https://www.reddit.com/r/Radiology/comments/oi2nmk/question_regarding_ultrasound/
Post a Comment
Read more