Collimation of the X-ray Beam | X-ray physics #8 | Radiology Physics Course #15
High yield radiology physics past paper questions with video answers
Perfect for testing yourself prior to your radiology physics exam 👇
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Collimation both reduces patient dose and improves image quality. In this talk we will review the mechanisms behind this. By the end of this talk we will have discussed the components of the X-ray tube, the anode heel effect, the focal spot, the line focus principle, filtration and collimation. In our next talk we will circle back to review the X-ray circuit that powers the X-ray machine.
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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
Пікірлер: 24
Amazing amazing, 12 min took me to understand this when I tried 2 hours with no luck
Nice explanation❤
Thank you so much 🤍
Simplest explanation ever. Thanks , helps a lot.
@radiologytutorials
Жыл бұрын
I’m so glad it helped Nishant. Simpler the better in my opinion when it comes to physics!
Thank you it was very helpful, I'm a 2nd year college, taking a radiologic technologist,❤
@radiologytutorials
10 ай бұрын
So glad it helped 🤗
Thank you very much for your great videos. I have a question though. what do you mean by saying ' Now these gray blocks here represent lead sheets that will attenuate our x-ray beam lay. It has a high atomic number. And we saw with the photoelectric effect, the higher the atomic number, the more likely the photoelectric effect is to occur', I really can't get my head wrapped around this phrase, I heard it in the previous video too but I don't get it. I'd really appreciate a brief explanation
Your videos are phenomenal! Thank you for all these resources/explanations. Just had a question about what you said at 00:04:26 How does collimating improve spatial resolution? Shouldn't it only affect contrast by decreasing scatter (scatter kills contrast)? Especially since our FOV hasn't technically changed (Matrix number, pixel size, etc). Similar to grid spatial resolution - "Because the grid does not change the size of the focal spot or the size of the pixels in the image matrix, it does not influence spatial resolution."
@radiologytutorials
7 ай бұрын
Thank you Dylan! You’re correct ✅ my mistake, meant to say collimation improves contrast resolution! Thanks for letting me know 👌🏼
These lectures are 👍 great. Not sure how I just discovered you now.
@radiologytutorials
9 ай бұрын
So glad you found the channel! Thanks for watching 🙌
excellent explanation, thank you.
@radiologytutorials
Жыл бұрын
Pleasure Dr Shwan 🙂
I am grateful for you that your teaching is interesting
@radiologytutorials
10 ай бұрын
Good to know that I'm not the only one who finds physics interesting 😆
@radiologytutorials
10 ай бұрын
Glad you enjoyed it!
Love❤ from india You doing great job 👍
@radiologytutorials
Жыл бұрын
Thank you. Love from South Africa 🇿🇦
thank you
Hi! Thank you for the very informative video (they are great!!). I have a question; does the cathode/anode difference in photon projection still apply when collimating since the lead sheets attenuate most of the lateral X-rays being projected? I watched your cathode vs anode photon projection video and was just curious. Sorry if this is common knowledge, I am going to school in July for X-ray school and I am just trying to get a good idea of how things work. Thanks a ton! Your videos are so helpful!
@radiologytutorials
Жыл бұрын
Hi Megan. Great question! The cathode anode difference (tube potential) determines both the average energy and number of x-ray photons produced. Collimation attenuates x-rays from the outer portion of the beam but does nothing to the x-rays still reaching the patient. Therefore, if cathode anode difference changes the energy and the number of photons reaching the patient (despite collimation) will still change. Watching the ‘factors that influence the x/ray spectrum’ video should help. Feel free to reach out if you have any more questions 🙂
@MeganSoukup-po9lh
Жыл бұрын
@@radiologytutorials Perfect! I will give that a watch! Thank you so much for the information!!!