Kaminsky S, Laniado M, Gogoll M, Clauss W, Langer M
Abteilung für Radiologische Diagnostik, Albert-Ludwigs-Universität, Freiburg.
Rofo. 1994 Sep;161(3):220-5. doi: 10.1055/s-2008-1032525.
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.
口服缓冲钆喷酸葡胺溶液（胃肠道造影剂马根维显，1 mmol/l，6 - 17 ml/kg）后，获取腹部和腹膜后病变的T1加权、质子密度加权和T2加权自旋回波图像（0.5 T）。钆喷酸是一种信号增强型阳性磁共振造影剂，腔内空气用作无信号阴性造影剂的模型。对21例患者的钆喷酸和空气与病变及脂肪的对比噪声比进行了定量比较（t检验）。在T1加权和T2加权图像中，钆喷酸与病变的对比噪声比显著高于空气。在质子密度图像中，两者无显著差异。在T1加权和质子密度图像中，空气与腹部脂肪的对比噪声比显著高于钆喷酸，在T2加权图像中，钆喷酸的对比噪声比显著高于空气。信号增强型阳性造影剂似乎比无信号阴性胃肠道磁共振造影剂更具优势。
