MRI Viva Questions (23/09/2004)

Kris Armoogum

[1] What documentation would you consult regarding MRI safety? (NRPB, MHRA, BS EN 60601-2-33, mrisafety.com).

[2] What are the main areas considered in MRI safety? (5 areas).

[3] What is the SAR? What are its units?

[4] What factors influence the SAR?

[5] What is the limit for switching gradient fields?

[6] What about safety regarding pregnant staff?

[7] What would you advise to a female in the first trimester who presents with suspected disc compression?

[8] Would you recommend a CT scan or MRI? What factors are considered?

[9] What effects would a quench have on a patient left in the treatment room?

[10] Regarding my musculoskeletal images – what is a dual echo turbo spin echo sequence?

[11] How would you achieve FatSat using a spin echo sequence?

[12] What is STIR? How does it achieve fat suppression?

[13] How would you select TR and TE to get T1, T2 and PDW?

[14] What parameters would you measure during QA? (SNR, uniformity, linearity).

[15] Which do you consider the most useful?

[16] Define SNR.

[17] How would you determine SNR from your QA images? (Use ROI, SNR = 0.655(S)/σ).

[18] Why did you use one large ROI and not several small ones?

[19] What did you measure during your GE Signa Acceptance Testing?

[20] What instrument did you use to determine the 0.5mT isocontour? (Gauss Meter).

[21] What is the basic principle behind a Gauss Meter? (Hall Effect).

[22] Why are pacemakers a contraindication?

Moderator:

[23] What legislation is in place regarding health and safety at work?

[24] What about electrical safety?

[25] What about using hazardous substances? (COSHH).