Oxygen saturation of blood in the superior mesenteric vein: in vivo verification of MR imaging measurements in a canine model. Work in progress.
Oxygen saturation of blood in the superior mesenteric vein: in vivo verification of MR imaging measurements in a canine model. Work in progress.
复制标题
肠系膜上静脉血氧饱和度：犬模型中 MR 成像测量的体内验证。
DOI：
10.1148/radiology.194.2.7824705
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
Song,CK
中科院分区：
文献类型：
--
作者：
Li,KC;Wright,GA;Pelc,LR;Dalman,RL;Brittain,JH;Wegmueller,H;Lin,DT;Song,CK
目的：评价磁共振（MR）成像在活体犬肠系膜上级静脉（SMV）血氧饱和度（%HbO2）测定中的准确性。用反射式血氧计测量%HbO2。在静息状态、上级肠系膜动脉闭塞期间和再灌注后获得这些测量值。然后通过线性回归分析比较MR成像和血氧计测量值。12和24 msec的RTS重新聚焦间期（tau 180）分别用于MR成像测量17和18%HbO2。tau 180为12 msec，MR成像测量值与血氧计测量值之间具有良好的相关性（r = 0.969）。截距为5.3%，斜率为0.959。τ 180为24 msec时，r = 0.953，截距为15.4%，斜率为0.817。结论：在大多数临床感兴趣的范围内，用MR成像估计SMV中的%HbO2是准确的。
PURPOSETo evaluate the accuracy of magnetic resonance (MR) imaging in estimating oxygen saturation of blood (%HbO2) in the superior mesenteric vein (SMV) of a canine model in vivo.MATERIALS AND METHODSMR imaging was used to measure the T2 of blood in samples obtained via a catheter placed in the SMV in seven mongrel dogs. %HbO2 was measured with a reflectance oximeter. These measurements were obtained at the resting state, during superior mesenteric artery occlusion, and after reperfusion. MR imaging and oximeter measurements were then compared by using linear regression analysis.RESULTSRefocusing intervals (tau 180) of 12 and 24 msec were used for 17 and 18 %HbO2 measurements with MR imaging, respectively. With tau 180 of 12 msec, there was an excellent correlation between MR imaging measurements and oximeter measurements (r = .969). The intercept was 5.3% and the slope was 0.959. With tau 180 of 24 msec, r = .953, the intercept was 15.4%, and the slope was 0.817.CONCLUSIONEstimates of %HbO2 in the SMV with MR imaging are accurate in the range of most clinical interest.