[Detection of focal lung lesions with magnetic resonance tomography using T2-weighted ultrashort turbo-spin-echo-sequence in comparison with spiral computerized tomography].
OBJECTIVE
To compare spiral CT and MRT for the detection of focal pulmonary lesions.


METHODS
50 patients with focal pulmonary lesions confirmed by spiral CT were examined using a T2-weighted UTSE sequence (TE: 90 ms, TR: 1500-3000 ms, echo interval 9 ms, 8 mm slice thickness, diastolic triggering, expiratory breath gating). Image quality was compared using a 4-stage scale. Lesions with a minimum size of 2 mm were counted and measured in the CT image. The results were compared with the MRT images.


RESULTS
The image quality in CT examinations with an average value of 1.22 better than that in MRT (1.78). In total 163 pulmonary lesions with a size of 2-115 mm were found by CT. MRT found 151/163 lesions (92.6%). Of the 12 lesions not detected, 9 were smaller than 4 mm, 1 corresponded to a 12 mm large, completely calcified granuloma. In 2 cases there was a 4 or 5 mm large unspecific scar. Thus, 160/163 (98.1%) of all lesions larger than 3 mm were detected.


CONCLUSIONS
MRT with use of a suitable UTSE sequence is an alternative to CT for the detection of focal pulmonary lesions with a size larger than 3 mm.
Lutterbey
G
G
Radiologische Universitätsklinik Bonn.
Leutner
C
C
Gieseke
J
J
Rodenburg
J
J
Elevelt
A
A
Sommer
T
T
Schild
H
H
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007089:Image Enhancement / Q000295:instrumentation*; D008168:Lung / Q000473:pathology; D008171:Lung Diseases / Q000175:diagnosis / Q000473:pathology; D008175:Lung Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000556:secondary; D008279:Magnetic Resonance Imaging / Q000295:instrumentation*; D008297:Male; D008875:Middle Aged; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed / Q000295:instrumentation*
Detektion fokaler Lungenläsionen mit der Magnetresonanz-Tomographie mittels T2-gewichteter Ultrashort-Turbo-Spin-Echo-Sequenz im Vergleich zur Spiral-Computer-Tomographie.