Helical CT cholangiography may be a clinically useful method for visualization of the biliary tree in some patients with suspected biliary disease with normal bilirubin levels and in patients in whom attempts at ERC fail.

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In patients with established cirrhosis, the risk of detecting HCC is maximal at the baseline screening (7%). Hepatitis C was the most common etiology for cirrhosis in study. In U.S. patients with established cirrhosis, CT scan exhibited higher sensitivity for detecting HCC than ultrasound or AFP.

OBJECTIVE. The purpose of thisstudywasto evaluate thefeasibilityof administeringtopical contrast material during helical CT dacryocystography and topical saline solution dur ing MR dacryocystography to reveal the lacrimal drainage apparatus. SUBJECTS AND METHODS. Fourteenhealthyvolunteers underwent helicalCTdacryocystography, MR dacryocystography, or both. Eight of the 14 subjects underwent both techniques; three subjects underwent MR dacryocystography, and three subjects underwent CT dacryocystography. Images were evaluated by two radiologists for degree of visualization of componentsof the lacrimal drainageapparatus. Each volunteerwas questionedaboutthe relativediscomfortof contrastmaterialandsalinesolutionadministration.

Background: The purpose of this article was to evaluate the accuracy and reproducibility of spiral computed tomography (CT) and the curved line and cubic spline algorithms in measuring liver volume. Methods: Spiral CT was performed in phantoms, cadaveric liver specimens, and 35 live human subjects (19 healthy volunteers and 16 patients). Images were transferred to a workstation, and volumes were measured by two observers. One observer repeated the measurements at a separate sitting. Results: The correlation between the CT measurement and the gold standard measurement of the cadaveric livers was very strong (r Å 0.94). For the live human subjects, the intraobserver and interobserver correlations were extremely high (r Å 0.999 and 0.997, respectively). The mean difference in liver volume measurements between the separate observations was 1%. Conclusion: The accuracy and reproducibility of this method of assessing liver volume are very high.