MRI Physics Fundamentals

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About Course

MRI physics is usually taught as a wall of equations and then abandoned the moment you sit at a console. This course does the opposite. It starts from what actually happens to hydrogen in the bore, and builds — lesson by lesson — to the parameters you change on a real protocol and the images that come back.

You will learn why TR and TE control contrast, what spin echo refocuses that gradient echo cannot, how a slice is chosen, what k-space really holds, and where SNR goes when you speed a scan up. Every lesson ends at the console, with the decision the physics was for.

Free in full. No prior physics assumed.

Continuing professional development

Learning time: 2 h 25 min (2.4 CPD/CPE hours). This is self-directed CPD. High Yield Imaging is not an accredited CE provider, so these hours are not ARRT Category A/A+ credits and are not pre-approved by any registration body. Most regulators accept relevant self-directed learning that you record with evidence — including MRTB (New Zealand), the Medical Radiation Practice Board / Ahpra (Australia), HCPC (UK), CORU (Ireland) and CAMRT (Canada). Your completion certificate states the learning time; keep it with a short reflection as your CPD evidence, and check your regulator’s current CPD policy for what counts.

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What Will You Learn?

  • Explain how net magnetisation forms in B0, how an RF pulse excites it, and where the signal comes from Distinguish T1, T2 and T2* by mechanism and predict which one a sequence is sensitive to Use the Excite–Wait–Encode framing to predict weighting from TR, TE, TI and flip angle Choose between spin echo and gradient echo families and justify the choice Explain slice selection, frequency and phase encoding, and read a k-space map Predict the effect of FOV, matrix, slice thickness, bandwidth, NSA and acceleration on SNR, resolution and time Name common artefacts, state the mechanism and pick a first-line remedy