title: [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].
abstract: 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.
authors.affiliation: Radiologische Klinik, Universität Bonn.
authors.forename: B
authors.initials: B
authors.lastname: Kreft
authors.forename: T
authors.initials: T
authors.lastname: Sommer
authors.forename: M
authors.initials: M
authors.lastname: Vahlensieck
authors.forename: S
authors.initials: S
authors.lastname: Seewald
authors.forename: H
authors.initials: H
authors.lastname: Vetter
authors.forename: H
authors.initials: H
authors.lastname: Schild
mesh_terms: 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
vernacular_title: Turbo-Spin-Echo(TSE)-Sequenzen mit selektiver Fettunterdrückung (SPIR) gegenüber Chemical-Shift-Sequenzen in der MRT zur Differenzierung von Nebennierentumoren.