Burton S S, Liebig T, Frazier S D, Ros P R
Department of Radiology, University of Florida College of Medicine, JHMHC, Gainesville 32610-0374, USA.
Magn Reson Imaging. 1997;15(2):147-53. doi: 10.1016/s0730-725x(96)00372-4.
Bowel and anatomic delineation were evaluated on abdominal magnetic resonance imaging scans in patients who received high-density barium sulfate orally (n = 16, BA+ group) or underwent magnetic resonance imaging without oral contrast (n = 14, BA- group). On T1-weighted images, the BA+ group had better delineation of gastric fundus, duodenum, jejunum, and ileum (p < .005) and pancreatic head (p < .02) than did the BA- group. On T2-weighted images, gastric fundus (p < .005), jejunum (p < .02), and ileum (p < .02) were better delineated in the BA+ group than in the BA- group. Analysis of patients' prior CT scans, used to control for selection bias, showed no differences in anatomic or bowel delineation between BA+ and BA- groups that would account for the differences seen in magnetic resonance imaging. One-fourth of patients could tolerate only 150 cc of contrast. High-density oral barium sulfate is recommended in patients undergoing magnetic resonance imaging for pancreatic or gastrointestinal tract disease, although patient intolerance may limit its widespread use in abdominal magnetic resonance imaging.
对口服高密度硫酸钡的患者（n = 16，BA+组）或未口服对比剂进行磁共振成像的患者（n = 14，BA-组）的腹部磁共振成像扫描评估肠道和解剖结构的描绘。在T1加权图像上，BA+组对胃底、十二指肠、空肠和回肠（p < .005）以及胰头（p < .02）的描绘比BA-组更好。在T2加权图像上，BA+组对胃底（p < .005）、空肠（p < .02）和回肠（p < .02）的描绘比BA-组更好。对患者先前的CT扫描进行分析以控制选择偏倚，结果显示BA+组和BA-组在解剖或肠道描绘方面没有差异，这可以解释磁共振成像中看到的差异。四分之一的患者只能耐受150 cc的对比剂。对于患有胰腺或胃肠道疾病而接受磁共振成像的患者，建议使用高密度口服硫酸钡，尽管患者不耐受可能会限制其在腹部磁共振成像中的广泛应用。
