Assume a typical clinical static field of Bo = 1.5T and a linear gradient field with...
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Assume a typical clinical static field of Bo = 1.5T and a linear gradient field with G=0B₂/02 = 10 mT/m. The volume of the sample to be imaged (the 'imaging volume') is 50 cm DSV ('diameter spherical volume').| a) Compare the maximum change in the field introduced by the gradient with that introduced by field inhomogeneities of 10 ppm. b) Compare the maximum change in frequency induced by the gradient with the Larmor frequency produced by the main field. c) Explain (qualitatively) how field inhomogeneities might affect the image. Assume a typical clinical static field of Bo = 1.5T and a linear gradient field with G=0B₂/02 = 10 mT/m. The volume of the sample to be imaged (the 'imaging volume') is 50 cm DSV ('diameter spherical volume').| a) Compare the maximum change in the field introduced by the gradient with that introduced by field inhomogeneities of 10 ppm. b) Compare the maximum change in frequency induced by the gradient with the Larmor frequency produced by the main field. c) Explain (qualitatively) how field inhomogeneities might affect the image.
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Solution a The maximum change in the field introduced by the gradient is G x DSV2 10 mTm x 50 cm2 25... View the full answer
Related Book For
University Physics with Modern Physics
ISBN: 978-0133977981
14th edition
Authors: Hugh D. Young, Roger A. Freedman
Posted Date:
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