False Positive CT Findings of Parametrial Invasion of Cervical Carcinoma

PURPOSE: To evaluate the causative factors of the false positive CT findings of parametrial invasions of cervial cancer. MATERIALS AND METHODS: we analysed 17 parametria of 14 patients with the diseases staged over lib on CT, but confirmed to be under stage Ila on pathology. The CT findings were retrospectively reviewed, and compared with pathologic findings. RESULTS: The causes of false postive diagnosis of parametrial invasions on CT were prominent cardinal ligaments (n=12), vaginal fornix(n=3), and prominent uterine vessels(n=2). CONCLUSION: Familiarity with these CT finding may be helpful in avoiding false positive diagnosis of parametrial invasion in patients with uterine cervical carcinoma.

Dynamic Liver Scan with Sprial CT

PURPOSE: Dynamic liver scan with spiral CT during a single breath hold was performed for To determing the optimal timing of scanning and the degree of the enhancement of liver and vessel. MATERIALS AND METHODS: Liver spiral CT was performed on 143 patients and dynamic sequence scan on 2 normal volunteers. After baseline spiral CT without contrast enhancement, spiral CT was performed after administration of a bolus of 100 ml of nonionic contrast material intravenously with mechanical power injector at the constant injection rate of 2 ml/sec. Cephalocaudal scanning was started 45 seconds after the beginning of injection. In the majority of cases we employed 16-24 continuous scanning with table feed of 10 mm, slice thickness of 10 mm, and reconstructed in 5 or 10 mm section increments. We measured degree of enhancement of aorta, IVC, and liver parenchyma in all images. RESULTS: We have achieved bolus phase at all images from the following measured date; 170-250 H. U at aorta, 110-150 H. U at IVC, 80-125 H. U at liver parenchyma, 100-130 H. U at spleen, which shown contrast difference between aorta and IVC at least 45 H. U. At the dynamic sequence scan, aortic and vascular CT atternuation reaches a peak at 55-60sec and peak hepatic enhancement occurred at 70-75 sec with relative plateau achieve at 45 sec. Spiral CT also showed elimination of variation in diaphragmatic excursion. CONCLUSION: We could get the disirable phase imaging at overall examination from the dynamic liver scan around 45-60 seconds after injection of contrast media.

An Experimental Microangiographic Study on Injured Liver Acinus by Ligation of Common Bile Duct

PURPOSE: The purpose of this study was to evaluate the morphologic changes of the injured hepatic acini following ligation of common bile duct and to investigate the pathophysiologic process of hepatic failure and biliary liver cirrhosis in the extrahepatic cholestasis. MATERIALS AND METHODS: The common bile ducts of 18 rabbits were ligated partially. The rabbits were killed and selective microangiography was carried out with infusion of barium suspension via portal vein 4 to 24 weeks after ligation. Selective microangiography was also carried out in two normal rabbits. The microangiographic findings were evaluated and correlated with histopathologic features. RESULTS: The sinusolds of the liver acinus showed distortion, varying degrees of luminal widening, and irregularities in architecture. Terminal branches of the portal vein (TPV) showed increased number of branches, luminal narrowing, tortuosity, distortion, and beaded appearance. Peribiliary plexi were found as thin curvilinear, barium-filled structures along the wall of the dilated bile duct. The microangiographic findings were well correlated with histopathologic findings. The grades of microangiographic and histopathologic findings were poorly correlated with the duration of the ligation of CBD. CONCLUSION: Changes in microvasculature of the liver acinus following partial ligation of common bile duct were demonstrated by microangiography. Although the microvascular changes were evoked secondary to the injury, they might have some active roles in the pathophysiologic process in the liver.

Experimental Microangiographic Study in Normal Rabbit Liver

PURPOSE: Microangiography is an experimental radiologic technique for evaluation of the morphology and the function of small vessels. The purpose of this study is to introduce a good microangiographic technique and to present the microangiographic appearance of normal hepatic vascular pattern. MATERIALS AND METHODS: Five white rabbits weighing 2.5-2.9Kg were objected. Polyethylene catheters were inserted in portal vein and then in IVC. Heparin mixed normal saline (2cc/1000cc) was infused through portal vein and blood was drained to IVC. Barium suspension was infused via the catheter placed in portal vein untill the liver surface showed satisfactory finding in barium filling. The liver was removed and this preparation was fixed in 10% formaline for 7 days. After fixation, the liver was sectioned on 1-2mm thickeness. The slices were radiographed on high resolution plate using Faxitron. H-E staining of liver tissue was also done. RESULTS: The microbrium was well distributed in all small vessels without filling defect. And we could find the hexagonal shaped classic liver Iobule, in which the central vein was located at central portion and portal vein at periphery. The enlargement was showed numerous sinusoids, but there was less dye in the central portion of Iobule, but the central vein was well filled by microbarium. The peripheral portion of Iobule was well filled with microbarium. So, we could find diamond shaped liver acinus, in which central vein was located at priperal portion and the center of liver acinus was terminal portal vein that growed out from a small portal space. The three acini made the complex acinus and acinar agglomerate was composed of three or four complex acini. CONCLUSION: It is considered that the liver acinus pattern of Rapparport is more acceptable on microangiography than the classic concept of hepatic Iobule.

Measurement of Blood Flow in the Carotid Arteries Using Color Doppler in Healthy Korean Adults

PURPOSE: To evaluate the blood flow patterns and the velocities of the carotid arteries in healthy Korean adults. MATERIALS AND METHODS: We evaluated the blood flow patterns and measured the peak systolic and end-diastolic velocities of the common, internal and external carotid arteries in 48 healthy adults who did not have cardiovascular disorders and neck lesions. The velocity difference was analyzed according to different age groups. In addition, peak systolic and end-diastolic velocity ratio of the internal to common carotid artery was estimated, and our data were compared with values reported by other authors. RESULTS: Generally, the velocity in the younger age group tends be to higher than in older group. The peak systolic and end diastolic velocities of the internal carotid artery were 84.5cm/sec and 30.5cm/sec. The peak systolic and end diastolic velocity ratio of the internal to common carotid artery were 0.715 and 0.966. The internal carotid artery was less resistant in blood flow than the external carotid artery. Our data were lower than the values which were reported by Bluth et al. CONCLUSION: The blood flow velocities of the internal carotid artery in healthy adults were lower than those of previously reported foreign values, but the patterns were similar.

A case of fetal cystic hygroma colli / 대한산부인과학회잡지

No abstract available.