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Value of Chemical Shift Subtraction MRI in Characterization of Adrenal Masses

¹ Department of Radiology, Uludag University Medical Faculty, Gorukle Campus, Bursa, Turkey 06141.
² Department of Biostatistics, Uludag University Medical Faculty, Gorukle Campus, Bursa, Turkey.

View larger version (11K): [in a new window]   Fig. 1 —Graph plots signal intensities of both adrenal adenomas and metastases on subtraction images. No overlap between adenomas and metastases is present.

View larger version (116K): [in a new window]   Fig. 2A —59-year-old man with right-sided adrenal adenoma. In-phase MR image shows right adrenal mass that is slightly hyperintense compared with spleen.

View larger version (111K): [in a new window]   Fig. 2B —59-year-old man with right-sided adrenal adenoma. Opposed-phase MR image shows decrease in signal intensity in adrenal gland compared with spleen.

View larger version (99K): [in a new window]   Fig. 2C —59-year-old man with right-sided adrenal adenoma. Chemical shift subtraction MR image shows marked signal increase throughout mass, indicating lipid content.

View larger version (110K): [in a new window]   Fig. 3A —70-year-old woman with right adrenal adenoma. T2-weighted turbo spin-echo image shows predominantly cystic lesion.

View larger version (117K): [in a new window]   Fig. 3B —70-year-old woman with right adrenal adenoma. On in-phase MR image, mass has heterogeneous signal intensity.

View larger version (107K): [in a new window]   Fig. 3C —70-year-old woman with right adrenal adenoma. Opposed-phase MR image shows marked decrease in signal intensity in peripheral solid component of mass compared with spleen.

View larger version (111K): [in a new window]   Fig. 3D —70-year-old woman with right adrenal adenoma. Chemical shift subtraction MR image shows markedly high signal intensity in peripheral solid component of mass, confirming presence of lipid in lesion.

View larger version (110K): [in a new window]   Fig. 4A —57-year-old man with right adrenal metastasis from lung carcinoma. In-phase MR image shows right adrenal mass that is almost isointense to left kidney.

View larger version (113K): [in a new window]   Fig. 4B —57-year-old man with right adrenal metastasis from lung carcinoma. Opposed-phase MR image shows mass as slightly hypointense to kidney. It was difficult to qualitatively classify mass as adenoma or nonadenoma.

View larger version (124K): [in a new window]   Fig. 4C —57-year-old man with right adrenal metastasis from lung carcinoma. Chemical shift subtraction MR image depicts markedly signal decrease throughout mass, indicating absence of lipid in lesion.

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