Marti-Bonmati L, Vilar J, Paniagua J C, Talens A
Department of Diagnostic Radiology, Hospital Dr Peset, Valencia, Spain.
Magn Reson Imaging. 1991;9(2):259-61. doi: 10.1016/0730-725x(91)90019-i.
High density barium sulphate suspension was investigated as an oral contrast on MRI. On 30 consecutive subjects, the stomach (in all cases) and the two first portions of the duodenum (in 21 cases) were filled with the suspension. This oral contrast behaved as a negative contrast, being hypointense on all pulse sequences (spin-echo T1-weighted, spin-echo T2-weighted and STIR). This characteristic is probably due to the low proton density of the suspension (260 +/- 40). Since barium sulphate is inexpensive, harmless and available on all radiologic departments, it is recommendable in MRI studies of the liver and head of the pancreas.
对高密度硫酸钡混悬液作为磁共振成像（MRI）的口服对比剂进行了研究。在连续30名受试者中，胃（所有病例）和十二指肠的前两段（21例）被该混悬液充盈。这种口服对比剂表现为阴性对比剂，在所有脉冲序列（自旋回波T1加权、自旋回波T2加权和短TI反转恢复序列（STIR））上均呈低信号。这一特性可能归因于该混悬液的低质子密度（260±40）。由于硫酸钡价格低廉、无害且在所有放射科均可获得，因此在肝脏和胰头的MRI研究中值得推荐。
