Quantitative evaluation of 99mTc-GSA in the rat liver after ischemia-reperfusion injury.

99mTc-DTPA-galactosyl human serum albumin (Tc-GSA) is a new liver-imaging agent which binds specifically to hepatic binding protein. The purpose of this study was to evaluate the usefulness of Tc-GSA in quantitatively evaluating hepatic ischemia-reperfusion injury in the rat. Regional hepatic ischemia was induced by clamping the left hepatic artery and the left portal vein for 5 to 45 min. A hepatic accumulation index (t90) was obtained on the basis of the dynamic data. A significant difference of this index was observed between all ischemic groups and the control. In conclusion, 99mTc-GSA appears useful for evaluating the hepatic ischemia-reperfusion injury.&#60;/P&#62;</p

ACC patterns on multiphasic dynamic CT

Tracheobronchial adenoid cystic carcinoma is a rare malignancy. To the best of our knowledge, its enhancement pattern on multiphasic contrast-enhanced multidetector computed tomography has not been reported. Herein, we report the computed tomography findings of three consecutive cases of tracheobronchial adenoid cystic carcinoma. All lesions presented a gradual enhancement pattern on multiphasic contrast-enhanced computed tomography. We speculate that the gradual enhancement pattern on multiphasic contrast-enhanced computed tomography could potentially serve as a characteristic imaging feature and may therefore be a clue to diagnose tracheobronchial adenoid cystic carcinoma