Half Value Layer (HVL) | X-ray physics | Radiology Physics Course #28
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- Опубліковано 19 жов 2024
- High yield radiology physics past paper questions with video answers
Perfect for testing yourself prior to your radiology physics exam 👇
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The half-value layer (HVL) is inversely proportional to the linear attenuation coefficient (LAC). The HVL acts as a proxy for beam quality/ beam penetrability. Here we will examine the relationship between the HVL and LAC as well as go through a short example explaining the negative exponential relationship between X-ray attenuation and distance travelled through a tissue.
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Not sure if the question banks are for you?
If you're here, you're likely studying for a radiology physics exam. I've spent the last few months collating past papers from multiple different countries selecting the most commonly asked questions. You'll be surprised how often questions repeat themselves!
The types of questions asked in FRCR, RANZCR AIT, ARRT, FC Rad Diag (SA), ABR qualifying Core Physics and MICR part 1 are surprisingly similar and the key concepts remain the same throughout. I've taken the most high-yield questions and answered them in video format so that I can take you through why certain answers are correct and others are not.
Happy studying,
Michael
#radiology #radres #FOAMrad #FOAMed
Ive been going back and forth in my physics in medical imaging textbook still not fully grasping the key concepts, Sir your videos are literal godsent. Suddenly my textbooks starts to make sense. Thank you!
I’m so glad. Feel like it was what I needed when I was struggling with my textbooks the first time round! Glad they’re helpful 🙂
Very nicely presented, excellent presentation. I wish 10 M subscribers for this channel
Thank you so much 😀
Really awesome sir. Very easily explained
Thank you 🙏🏻
Thanks for the example!
Glad it was helpful!
Undoubtedly Best video lectures available for Radiology Students.
I'm so glad you think so 🥳
Brilliant explanation
Thank you Ruth!
I am a nuclear engineering student and having a course on health physics...So i am here before semester final...
Sir when will be the CT and MRI physics lectures available?
I’ve just started creating the MRI slides. Hoping to start next week 👌🏼
@@radiologytutorials sir and CT too ..we would be highly obliged ❤️
Of course. CT after MRI
@@radiologytutorials sad :( ive got mri exam next week hahaha thank you for your videos it has been really helpful
😭😭 bleak! Wish I could have come through for you Hanafie! I’m sure you’ll do great! Good luck for the exam 🙂
So, let's say I bombard a 0,9cm thick layer of lead with 1meV, it's halved after those 0,9cm. Then to reach 25% of the initial photon energy, I'll need another 0,9cm of lead?
Exactly! (Assuming the beam is monoenergetic) 🙂
Thanks...
USG physics
And MRI PHYSICS
Please confirm an analysis:
Total No.of incident X-rays / photon reduction factor = No.of exiting X-rays