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

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➡️ CT QUESTION BANK: COMING SOON ⏱️

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Today we'll discuss the CT Machine. We'll start by looking at X-ray production. We'll review the process of thermionic emission at the cathode filament. Next we'll discuss how filament current and tube potential influence X-ray beam quantity and quality.

X-rays are produced at the actual focal spot and the line focus principle determines the size of the effective focal spot (using the anode andgle and actual focal spot product). Most of the bombarding electrons at the anode produce heat. The remainder will cause the release of x-ray radiation. This is either Bremsstrahlung radiation or characteristic radiation. We review both here.

Once x-rays have been produced they need to be detected in order to start image processing. X-rays are detected by either direct or indirect detector elements. The majority of modern scanners use indirect detectors (solid state detectors) which convert x-rays into light and light into electrical current.

Following this we'll review anti-scatter grids in computed tomography (CT), as well as collimation and filtration of the x-ray beam.

We'll end things off by looking at how slip ring technology allows for continual rotation of the CT 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