[Qualitative control over quantitative MR tomography: in vitro and in vivo checks on relaxation time measurements].
In-vivo and in-vitro checks on measurements of relaxation times in MRI have been carried out as part of quality control. For the in-vitro experiments we used 13 reagents consisting of varying concentrations of copper sulphate manganese sulphate, gadolinium solutions and various oils as well as water. For in-vivo measurements we used liver parenchyma and fat in three subjects. Eight different sequences were performed; intra- and interindividual variations and comparison of three similar MRI units showed average variations of 2-3% for T1 and 3-4% variations for T2 relaxation times. This margin of error makes quantitative MRI acceptable for clinical use.
Steudel
A
A
Radiologische Klinik, Universität Bonn.
Träber
F
F
Krahe
T
T
Schiffmann
O
O
Harder
T
T
D000293:Adolescent; D000328:Adult; D003287:Contrast Media; D006801:Humans; D008099:Liver / Q000033:anatomy & histology; D008279:Magnetic Resonance Imaging / Q000295:instrumentation / Q000379:methods / Q000592:standards*; D008297:Male; D008961:Models, Structural; D011786:Quality Control; D013997:Time Factors
D003287:Contrast Media
Qualitätskontrolle der quantitativen MR-Tomographie: In-vitro- und In-vivo-Uberprüfung von Relaxationszeitmessungen.