• April 12th, 2016

MRI short answer

Paper, Order, or Assignment Requirements

You have been introduced to the concept of the magnetic moment of certain nuclei. Describe, with examples, what is meant by magnetic moment. Under what circumstances does a nucleus have a magnetic moment? (1 paragraph each)

In the hydrogen nucleus, what is the energy difference between the parallel and anti-parallel states when placed in a 1.5 T magnetic field? What are the units of energy measured in? If one were to double the magnetic field strength, what happens to the energy difference? Given that the frequency of an x-ray is 2 x 1019Hz, calculate the energy of the photon. Comment on the significance of the relative energies used in MRI and CT.

Describe how MRI sequences spatially encode nuclei in the read and phase direction.(No more than one page)

Two Fourier transforms are required to convert k-space data to an image. Discuss. (Approx half a page)

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