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

Fibrous Dysplasia of the Skull

By
submitted by /u/ctisus [link] [comments] source https://www.reddit.com/r/Radiology/comments/111ej8m/fibrous_dysplasia_of_the_skull/
Post a Comment
Read more

AI for radiology - A survey

By
Hello folks! We are a group of students from Karolinska Institutet and Stockholm University (Sweden). We are conducting a short survey (it should not take more than 10 minutes of your time) to evaluate an Artificial Intelligence framework for evaluating medical imaging and, in particular, the effect that explainability can have on clinicians' attitudes toward it. We welcome anyone who interacts with medical imaging to take our survey, so please, feel free to do it even if you are still a student or an intern! If you know someone who works in the field, please, pass them the survey. It would help us greatly. https://bit.ly/RTEX_survey Thanks in advance to all of you! submitted by /u/francozzz [link] [comments] source https://www.reddit.com/r/Radiology/comments/r2ratp/ai_for_radiology_a_survey/
Post a Comment
Read more