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GATE 2025 BM – Question 62

Medical Imaging Systems · Magnetic Resonance Imaging · 2 marks · Numerical answer

Proton gyromagnetic frequency ratio is 42.58 MHz/T. Find resonance frequency at 1.5 T to two decimal places in MHz.

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Correct answer: 63.80 to 63.90

Explanation

The frequency ratio is already in megahertz per tesla. Thus Larmor frequency is f=42.58×1.5=63.87 MHz. An additional 2π conversion would be appropriate only if the supplied ratio were angular rather than in MHz/T.

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