1. What does precession mean? A. The spinning of hydrogen protons around their o

Question

1. What does precession mean?

A. The spinning of hydrogen protons around their own axis.

B. The change in orientation of hydrogen molecules when exposed to radiowaves at the Larmor frequency.

C. The wobble of hydrogen protons exposed to a large magnetic field.

D. Water molecules gain an extra molecule of hydrogen when exposed to a magnetic field.

2. In MRI the resonant frequency of a specific tissue is NOT determined or affected by the:

A. Specific isotope being imaged

B. Characteristics of the molecule

C. Orientation of magnetic field

D. Strength of the magnetic field

Explanation / Answer

for 1

option A is corect  

that is spinning of hydrogen protons around their own axis

for 2

option B corrrct .......characterstics of the molecule

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