Altering the X-ray Spectrum | X-ray physics | Radiology Physics Course #22
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- Опубликовано: 31 июл 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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There are five main factors that, when changed, alter the x-ray spectrum. These factors will affect the X-ray beam quality and/or the X-ray beam quantity. Here we will cover how changes in filament current, tube potential, filtration, generator waveform and target material affects the X-ray spectrum.
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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
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This videos are very very helpful to me sir.i was not able to understand this concepts in class
Especially the calmness through which you teach and giving conclusion of every topic make it easy to understand
Thank you sir🙏🙏
Superb explanation, very very nicely presented. Thanks a million 😊
Thank you Fazal 👍🏼 really appreciate all your support on these physics videos!
Thank you so much sir...🥹🙏 well understood..♥️
your whole x-ray series has been insanely helpful! so grateful to you!!!!!
Ah that’s so good to hear! Thank you for letting me know Saania ☺️
Very helpful, thank you! Highly appreciated.
Great! Glad it was helpful ☺️
Thank you, this is helpful
Can’t get enough!!!!
Thank you sir.
Sir any video for understanding tube and thermal rating please.
eres el mejor! hi from Miami, Florida USA
Really helpfull and clearly discussed😊
Excellent! Glad it helped 🙂
Can you clarify how increasing kVp increases beam quantity? My textbook says that higher energy electrons individually create multiple interactions at the anode, resulting in multiple photons produced from each electron. In this video it sounds like you're saying higher kVp pushes more total electrons from the cathode to the anode, not that each electron is creating more photons?
Hi Michael, in this video you say that bremsstrahlung radiation production is exponentially proportional to the atomic number of the target material. But in your review course on Radiopedia you wrote "anode material: beam quantity is *_directly_* proportional to the atomic number (Z) of the anode material". Maybe I'm misunderstanding what it meant by the phrase "directly proportional", but I interpret that to mean that there's a positive *_linear_* (rather than exponential) relationship between atomic number and bremsstrahlung production. Can you clarify what you meant by that statement on radiopedia? Does the phrase "directly proportional" mean exponentially proportional?
Thanks
I finally understand what ist going on. Thank you very much!
However, I have a question. In the filament current you use 80 kV as an example but you have in the next graph 100 keV.
While in the tube potential the 80 kV has 80 keV.
And I do not really get, why..
perfect...you are a good man :)
Appreciate it 🙂
Great explanation 😀
Glad it was helpful! Thank you Robin 🙂
Excellent explaination
Thank you Muhammad!
thank you for this amazing video series. One question, is the ma (tube current) the same as the filament current. I've read that it is not. Can you clear it up for me?
Pleasure. Yes, there is a difference. Filament current is the current passing through the tungsten filament (changes affect the number of electrons released via thermionic emission). Tube current is the flow of electrons across the tube - this is influenced by a combination of the filament current and the tube potential. A change in tube potential will influence the tube current but not the filament current.
Hi i would like to ask if we were to use single phase alternating does the tube current move through and fro the anode target due to the alternating direction of the current. Or am i totally in confus ion. 😂
Exactly Asraf 🙂 There obviously wouldn't be any electrons produced at the anode but those within the vacuum would head back towards the cathode when the current switches (not ideal!) That's why we need a direct non-alternating current 👍
First! 🎉