David K W Yeung1, Devin K. Fong1,
Queenie Chan2, Ann D. King1
1Diagnostic Radiology and Organ
Imaging, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong; 2MR,
Philips Healthcare, Wanchai, Hong Kong
Proton
MRS is useful to probe tissue metabolism in vivo and its application yields
considerable information about tissue biochemistry. In the head and neck, the
detection of choline peak using single voxel spectroscopy has been found
useful in confirming malignancy and treatment response. CSI is desirable for
the study of large heterogeneous lesions, but shimming a large volume in the
head and neck is challenging due to large susceptibility differences. We
employed an anti-susceptibility device to improve the local field
homogeneity. We examined 13 patients using this technique and we showed that
CSI is feasible in the head and neck.