MRI of the pelvis at 3 T: very high spatial resolution with sensitivity encoding and flip-angle sweep technique in clinically acceptable scan time.
OBJECTIVE
The higher signal at 3.0-T allows spatial resolution to be increased without loss in image quality. We evaluated a T2-weighted turbo spin-echo sequence with high spatial resolution (3T-HR) to determine whether this provides clinically useful pelvic MRI.


METHODS
We designed a sequence with high spatial resolution (3T-HR) (0.45x0.46x4 mm) that was combined with parallel imaging and the variable refocusing angle technique (8.06 min). We examined 23 patients with gynecological disorders using 3T-HR and a standard sequence (3T-SP; 4.03 min; equivalent to 1.5 T). Two radiologists analyzed tissue contrast, signal to noise, detail delineation and artifact level.


RESULTS
Tissue contrasts and signal to noise were rated equal. Motion artifacts occurred more often with 3T-SP despite the longer scanning time of 3T-HR. The higher spatial resolution provided additional information in four patients. In two patients small myomas were detected, in one patient a lymph node metastasis was apparent, and in one patient 3T-HR excluded tumor invasion.


CONCLUSIONS
High spatial resolution pelvic studies with high image quality can be obtained at 3 T in acceptable scan time. The higher spatial resolution that is feasible at 3 T also provides more clinically relevant information.
Morakkabati-Spitz
Nuschin
N
Department of Radiology, University of Bonn, Sigmund-Freud-Strasse 25, 53105, Bonn, Germany. morakkabati@uni-bonn.de
Gieseke
Jürgen
J
Kuhl
Christiane
C
Lutterbey
Götz
G
von Falkenhausen
Marcus
M
Träber
Frank
F
Park-Simon
Tjoung-Won
TW
Zivanovic
Oliver
O
Schild
Hans H
HH
D000293:Adolescent; D000328:Adult; D005260:Female; D005831:Genital Diseases, Female / Q000473:pathology*; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008875:Middle Aged; D010388:Pelvis; D011446:Prospective Studies; D018709:Statistics, Nonparametric