[Turbo-spin-echo (TSE) sequences with selective fat suppression (SPIR) compared with chemical shift sequences in MRI for differentiation of adrenal tumors. Spectral Presaturation by Inversion Recovery].
OBJECTIVE
The value of chemical-shift-gradient-echo sequences and turbo-spin-echo sequences with selective fat suppression (SPIR = Spectral Presaturation by Inversion Recovery) in the differentiation of benign and malignant adrenal tumours was investigated.


METHODS
Both techniques were performed at 1.5 T in 22 patients with 24 tumours. The loss of signal intensity of the tumour or of the signal intensity ratio between tumour and liver or muscle on the opposed phase Fast-Field-Echo (FFE) sequence in comparison to the in phase FFE sequence or on the TSE-SPIR sequence compared to the TSE sequence was the criterion for intratumoral lipid, suggesting a benign mass.


RESULTS
The sensitivity and specificity of the chemical shift technique was 62-77 and 100%, respectively. In adrenal tumours larger than 1.5 cm sensitivity of the chemical-shift technique was 89%. On the contrary sensitivity of the TSE-SPIR sequence was only 11-78%. Both techniques had a specificity of 100%.


CONCLUSIONS
The chemical shift technique is more accurate in the differentiation of adrenal masses than the TSE-SPIR sequence.
Kreft
B
B
Radiologische Klinik, Universität Bonn.
Sommer
T
T
Vahlensieck
M
M
Seewald
S
S
Vetter
H
H
Schild
H
H
D000236:Adenoma / Q000175:diagnosis*; D000310:Adrenal Gland Neoplasms / Q000175:diagnosis* / Q000556:secondary; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002283:Carcinoma, Bronchogenic / Q000175:diagnosis / Q000556:secondary*; D003937:Diagnosis, Differential; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D008175:Lung Neoplasms; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D010673:Pheochromocytoma / Q000175:diagnosis*; D012680:Sensitivity and Specificity
Turbo-Spin-Echo(TSE)-Sequenzen mit selektiver Fettunterdrückung (SPIR) gegenüber Chemical-Shift-Sequenzen in der MRT zur Differenzierung von Nebennierentumoren.