No abstract available.

No abstract available.
Constriction, Pathologic*

No abstract available.
Adult* ; Dental Pulp Cavity* ; Humans ; Incisor*

Various measurements of cerebral ventricles in 50 normal newborn infants were performed, using ultrasonography. In transverse scan using linear array real-time scanner with 3 MHz transducer, the ratio of the distance between the falx and lateral wall of lateral ventricle to the hemispheric width was measured, In coronal scan through the anterior fontanelle using gray scale B-mode scanner with 5 MHz trand ucer, the ratios of the bifrontal diameter of the lateral ventricles to externally measured biparietal diameter and to head circumference were measured. Width of frontal horn at 5mm distance from the lateral end of frontal horn was also measured. In addition, the presence of cavum septi pellucidi was investigated in coronal scan. The result are as follows; 1. The lateral ventricle/hemispheric width ratio in transverse scan was 0.31±0.03. 2. Bifrontal diameter of lateralventricle/biparietal diameter ratio was 0.20±0.02 and bifrontal diameter of lateral ventricle/head circumference ration was 0.054±0.006. 3. Width of frontal horn was about 1mm and maximum width was 2 mm. 4. There was no significant difference in ventricular size between male and female, and among different gestation ages. 5. Cavumsepti pellucidi was found in 44 neonates (88%) among 50 normal neonates in coronal scan.
Animals ; Cerebral Ventricles ; Cranial Fontanelles ; Female ; Head ; Horns ; Humans ; Infant, Newborn ; Lateral Ventricles ; Male ; Pregnancy ; Transducers ; Ultrasonography

A case of a pleomorphic giant cell tumor of the pnacreas in a 54 year old man is presented. It produced hugecystic mass in the pancreatic area ultrasonographically. Also multiple loculated pancreatic pseudocyst andmultiple low densities in liver were presented in CT. Pathologically this case was a form of giant cell carcinomawhich was called as epulis-osteoid type, but the osteiod component in this case was not conspicuous.
Carcinoma, Giant Cell ; Giant Cell Tumors ; Giant Cells ; Liver ; Pancreas ; Pancreatic Pseudocyst

The measurement of the relative X-ray abssorption coefficient (CT No.) and the size of the lesion on CT ishighly valuable in the diagnosis of the certain disease, guide to treatment planning, and follow-up of patientunder treatment. But as the CT is a synthetic image, CT No. and size displayed in CT are greatly influenced byvarious factors such as KVp, slice thickness, scan time, CT No. of the surrounding, geometry of lesion in gantry,window width(W.W) and window level(W.L) etc. The study was performed ot evaluate the accuracy and error range ofthe CT measurement, including CT No. and size affected by various conditons using phantom model designed byauthor., Author also propose the optimum window width and window level for measurement of real size on CT. Theresulsts are as follows; 1. The CT No. of the lesion increases as the CT N. of surround increase if the CT No. ofthe lesion is below-100 H.U., while the CT No. of the lesion decreases as the CT No. of surround increases if theCT No. of the lesion is above 900 H.U. 2. The CT No. increases as photon influx (mAs) during scan increases. The higher the CT No. of the lesion, the greater the degree of increases are. 3. If the CT No. of the lesion is greater than that of surround, the size of the lesion increases as window level decreases. The narrower the windowwidth, the larger the difference between the maximum and minimum value of measurement and the steeper the slope ofchange is. 4. The window width affects the size if the measured size is sufficiently different from the true size.5. The greater the difference between the CT No. of the lesion and that of surround, the greater the differencebetweeen the maximum and minimum value of measurement. and as the CT No. of surround increases, the differencebetween the minimum and maximum value also increases. 6. The optimal window width and level for size measurementareas follows; Soft tissue
Diagnosis ; Follow-Up Studies

This study was intended to investigate the pre-and postoperative profile of seizures in the patients with cerebral arteriovenous malformatins(AVM's), and to evaluate various preoperative factors to predict the postoperative occurrence of seizures. The patients consisted of 46 consecutive cases with supratentorial AVM's operated on from May 1987 to May 1993. Their mean follow-up duration was 40 months. The pre- and postoperative seizure profiles were similar to each other. The overall incidence of patients experiencing seizure were 50% preoperatively and 52% postoperatively, and the incidence of intractable seizure was 15%, which was the same in both the pre-and postoperatively period. The presence of preoperative seizure and large size of AVM were significant indicators of high incidence of postoperative seizures(P<0.05), while other factors such as preoperative intracerebral hemorrhage or embolization showed no significant influence on the occurrence of postoperative seizures. About 70% of the patients with preoperative seizures also had postoperative seizures, while those without preoperative seizures developed new ones only in 35% of the cases postoperatively. The mean size of the AVM's in the group, with postoperative seizures was larger than that of the group without postoperative seizures(4.56 vs. 3.02 cm). Regarding postoperative intractable seizures, 57% of the group with preoperative intractable seizures remained intractable postoperatively and groups with preoperatively controlled and groups without seizures demonstrated postoperative intractablity only in 13% and 4% respectively. In conclusion, surgery of AVM's did not change the overall incidence of seizures, both controlled and intractable, and patients with preoperative and large sized AVM's and significantly higher possibility of postoperative seizures. Patients with preoperative intractable seizures resulted in control of seizures in 43% after removal of AVM, while 57% remained intractable. Extirpation of epileptic focl, after localization with preoperative study, seems to be needed to improve the outcome of the postoperative seizures.
Cerebral Hemorrhage ; Follow-Up Studies ; Humans ; Incidence ; Intracranial Arteriovenous Malformations* ; Seizures*

OBJECTIVES: To determine the effect of interpolation functions when processing the digital periapical images. MATERIALS AND METHODS: The digital images were obtained by Digora and CDR system on the dry skull and human subject. 3 oral radiologists evaluated the 3 portions of each processed image using 7 interpolation methods and ROC curves were obtained by trapezoidal methods. RESULTS: The heighest Az value(0.96) was obtained with cubic spline method and the lowest Az value(0.03) was obtained with facet model method in Digora system. The heighest Az value(0.79) was obtained with gray segment expansion method and the lowest Az value(0.07) was obtained with facet model method in CDR system. There was significant difference of Az value in original image between Digora and CDR system at alpha=0.05 level. There were significant differences of Az values between Digora and CDR images with cubic spline method, facet model method, linear interpolation method and non-linear interpolation method at alpha= 0.1 level.
Humans ; Radiography, Dental, Digital ; ROC Curve ; Skull ; Tooth*

No abstract available.
Humans ; Peritoneal Dialysis, Continuous Ambulatory* ; Peritonitis*