The GATE Grind

GATE 2020 BM – Question 15

Medical Imaging Systems · Magnetic Resonance Imaging · 1 mark · MTA

The source asks which MRI contrast results from “long T_REP or short T_ECHO.”

  1. Proton-density weighted
  2. T₂ weighted
  3. T₁ weighted
  4. T₂* weighted

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Correct answer: MTA

Explanation

The official key awards marks to all for this question. Long repetition time together with short echo time is the usual proton-density-weighted combination, reducing both T₁ and T₂ weighting. However, the printed “or” does not specify both parameters together and cannot uniquely determine image contrast. The marks-to-all status is preserved.

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