[A comparison of positive and negative enteral contrast media for the magnetic resonance tomography of the abdomen].
Following oral administration of a buffered gadopentetate-dimeglumine solution (Magnevist enteral, 1 mmol/l, 6-17 ml/kg) T1-, proton-density- and T2-weighted spin-echo images of abdominal and retroperitoneal lesions were acquired (0.5 T). Gadopentetate is a signal-enhancing, positive MR contrast agent, intraluminal air served as a model of a signal-free, negative agent. In 21 patients contrast/noise ratios of gadopentetate and air versus lesions and fat were compared quantitatively (t-test). In T1- and T2-weighted images contrast/noise ratios of gadopentetate versus lesions were significantly higher than those of air. In proton-density images there was no significant difference. In T1- and proton-density images contrast/noise ratios of air versus abdominal fat were significantly higher than those of gadopentetate, in T2-weighted images gadopentetate had a significantly higher contrast/noise ratio than air. Signal-enhancing positive contrast agents seem advantageous over signal-free negative enteral MR contrast agents.
Kaminsky
S
S
Abteilung für Radiologische Diagnostik, Albert-Ludwigs-Universität, Freiburg.
Laniado
M
M
Gogoll
M
M
Clauss
W
W
Langer
M
M
D000005:Abdomen / Q000473:pathology*; D000008:Abdominal Neoplasms / Q000175:diagnosis / Q000453:epidemiology; D000388:Air; D003287:Contrast Media; D005069:Evaluation Studies as Topic; D005682:Gadolinium; D019786:Gadolinium DTPA; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000295:instrumentation / Q000379:methods* / Q000706:statistics & numerical data; D009942:Organometallic Compounds; D004369:Pentetic Acid / Q000031:analogs & derivatives; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis / Q000453:epidemiology; D012189:Retrospective Studies
D003287:Contrast Media; D009942:Organometallic Compounds; D004369:Pentetic Acid; D005682:Gadolinium; D019786:Gadolinium DTPA
Vergleich positiver und negativer enteraler Kontrastmittel für die magnetische Resonanztomographie des Abdomens.