Filament X-ray Circuit | X-ray physics | Radiology Physics Course #18

*High yield radiology physics past paper questions with video answers*
Perfect for testing yourself prior to your radiology physics exam 👇

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*I have also created two RADIOPAEDIA LEARNING PATHWAYS*

WHAT’S INCLUDED?
✅This YouTube series Ad free
✅Constantly updated Radiopaedia articles
✅Summary slides
✅Key take home bullet points throughout
✅Multiple review quizzes
✅Short answer review questions
✅Official Radiopaedia course completion certificate

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The final component of the X-ray circuit the tube circuit (filament circuit). Here we are able to select our filament current using a rheostat and we can select our filament size. We will review step down transformation prior to the cathode itself. Hopefully, in combination with the previous two videos, you will now have a better understanding of the X-ray circuit.

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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

[RockyGerald]

Such great content. especially for me as a first year radiology resident. Thank you

[fazaltahir]

Thank you so much for uploading videos on these topics, superbly explained 💖

[emiliasalas]

excellent! thank you, now understand.

[yousefabuali]

Can you talk about tube adaptation? We know that after a period of time, the filament will get thinner so its resistance will increase and it will affect the filament current. How can we maintain the tube current? Can you explain it using ohms law?

[lula]

Great, those videos were really helpful!

[Q-Bits]

Our professor said that a typical "filament current" is 16 A (not mA!) and a typical tube current is in the mA territory. How does this make sense? Are the 16A after increasing the current with the step down transformer? And is the filament current (mA before stop-down transformer) the "only" current that is directly changeable (with a "Knob" on the machine)? You can't change the tube current with a knob directly (just indirectly by adjusting tube potential etc.) right?