Review Question - QID 3554

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Shoulder Imaging Magnetic Resonance Imaging Overview QID: 3554 (OBQ11.131)

QID 3554 (Type "3554" in App Search)

The proton energy produced by a 1.5 Tesla magnetic resonance imaging (MRI) machine most closely approximates what percentage of a 3.0 Tesla machine?

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11%

34%

998/2937

91/2937

66%

19%

566/2937

33%

40%

1187/2937

99%

70/2937

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The proton energy produced is about nine times greater for a 3.0 Tesla MRI machine compared to a 1.5 Tesla machine.

Cousins et al. report that magnetic field strength is an important factor in achieving a high signal-to-noise ratio and contrast. They state that other factors that effect this ratio include the sample size, the T1 and T2 relaxation factors, and the number of averages or excitations (NEX).