[The MRT of malignant tumors of the oral cavity and oropharynx with frequency-selective and inversion-recovery fat-signal suppression].
OBJECTIVE
Evaluation of frequency-selective fat saturation (FS) and Short-Tau-Inversion-Recovery (STIR) fat suppression (FU) in MRI of patients with malignant tumours of the oral cavity or oropharynx.


METHODS
Twenty patients with biopsy-proven squamous cell carcinoma of the oral cavity or oropharynx were examined by MRI at 1.0 T. A T2-weighted TSE-sequence with and without STIR-FU and a T1-weighted SE-sequence with and without FS were compared in axial slices.


RESULTS
STIR-FU was successful in all and FS in 29/33 (87.9%) of the examinations. When visualisation and delineation of tumours were ranked on a four-point scale (0-3), respective mean values for images without/with FU or FS of 1.9 and 2.6 for T2-TSE, 1.4 and 1.3 for T1-SE without contrast media administration (CM) and 2.0 and 2.5 with CM were found. Signal/noise-ratios were inferior with FU and FS, but the tumour/muscle intensity ratio in CM-T1-SE improved with FS.


CONCLUSIONS
STIR-T2-TSE and FS-T1-SE with CM were most useful for MRI of carcinomas of the oral cavity and oropharynx.
Institut für Radiologische Diagnostik, Ludwig-Maximilians-Universität München.
G U
GU
Müller-Lisse
U L
UL
Kretschmar
L J
LJ
Jäger
A
A
Dreher
G
G
Grevers
M F
MF
Reiser
D000273:Adipose Tissue / Q000473:pathology; D016477:Artifacts; D002294:Carcinoma, Squamous Cell / Q000175:diagnosis*; D003287:Contrast Media; D005260:Female; D005682:Gadolinium; D019786:Gadolinium DTPA; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000295:instrumentation / Q000379:methods* / Q000706:statistics & numerical data; D008297:Male; D008875:Middle Aged; D009055:Mouth / Q000473:pathology; D009062:Mouth Neoplasms / Q000175:diagnosis*; D009364:Neoplasm Recurrence, Local / Q000175:diagnosis*; D009942:Organometallic Compounds; D009959:Oropharyngeal Neoplasms / Q000175:diagnosis*; D009960:Oropharynx / Q000473:pathology; D004369:Pentetic Acid / Q000031:analogs & derivatives; D018709:Statistics, Nonparametric; D013997:Time Factors
D003287:Contrast Media; D009942:Organometallic Compounds; D004369:Pentetic Acid; D005682:Gadolinium; D019786:Gadolinium DTPA
MRT maligner Tumoren der Mundhöhle und des Oropharynx mit frequenzselektiver und Inversion-Recovery-Fettsignalunterdrückung.