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.