[Fat-suppressing STIR sequences with and without contrast media in the MRT of ENT tumors].
Fat-suppressed STIR (short TI inversion recovery) sequences were compared to plain and contrast-enhanced T1-weighted SE sequences of head and neck tumors. 19 patients underwent MR imaging on a 0.5 Telsa system (T5-II, Philips). STIR imaging parameters: TR/TE = 1000/20 ms, inversion pulse 100 ms. All films were read by four radiologists. The image quality was graded: score from 0 to 5, by means that grade 5 = optimal quality. Sensitivity was 89% in STIR, 96% in SE sequences. Tumor delineation was graded good in the enhanced T1-weighted and enhanced fat suppression images. The unenhanced imaging was superior in STIR (STIR/T1 = 2.8/2.43). The tumor contrast was best in contrast enhanced and plain STIR sequences (STIR contrast = 3.41), and in the contrast enhanced T1-weighted SE (3.33). STIR almost equaled T1 post-contrast in respect of tumour conspicuity, but the sensitivity was lower. STIR can be a supplement to SE, but cannot substitute T1 postcontrast. The combined use is expected to have the highest assessment value.
Brüning
R
R
Radiologische Uniklinik, Universität Bonn.
Heuck
A
A
Naegele
M
M
Seelos
K
K
Vahlensieck
M
M
Reiser
M
M
D000273:Adipose Tissue / Q000473:pathology*; D016477:Artifacts; D003287:Contrast Media; D005069:Evaluation Studies as Topic; D005682:Gadolinium; D019786:Gadolinium DTPA; D006801:Humans; D008198:Lymph Nodes / Q000473:pathology; D008279:Magnetic Resonance Imaging / Q000295:instrumentation / Q000379:methods* / Q000706:statistics & numerical data; D009942:Organometallic Compounds; D010039:Otorhinolaryngologic Neoplasms / Q000175:diagnosis*; D004369:Pentetic Acid / Q000031:analogs & derivatives; D012680:Sensitivity and Specificity; D013997:Time Factors
D003287:Contrast Media; D009942:Organometallic Compounds; D004369:Pentetic Acid; D005682:Gadolinium; D019786:Gadolinium DTPA
Fettunterdrückende STIR-Sequenzen mit und ohne Kontrastmittel bei der MRT von HNO-Tumoren.