No abstract available.
Pancreatitis*

No abstract available.
Stents* ; Trachea*

PURPOSE: To date, the high spatial frequency algorithm (HSFA) which reduces image smoothing and increases spatial resolution has been used for the evaluation of parenchymal lung diseases in thin-section high-resolution CT. In this study, we compared the ultrahigh spatial frequency algorithm (UHSFA) with the high spatial frequency algorithm in the assessment of thin section images of the lung parenchyma. METHODS AND MATERIALS: Three radiologists compared the UHSFA and HSFA on identical CT images in a line-pair resolution phantom, one lung specimen, 2 patients with normal lung and 18 patients with abnormal lung parenchyma. RESULTS: Scanning of a line-pair resolution phantom demonstrated no difference in resolution between two techniques but it showed that outer lines of the line pairs with maximal resolution looked thicker on UHSFA than those on HSFA. Lung parenchymal detail with UHSFA was judged equal or superior to HSFA in 95% of images. Lung parenchymal sharpness was improved with UHSFA in all images. Although UHSFA resulted in an increase in visible noise, observers did not found that image noise interfered with image interpretation. The visual CT attenuation of normal lung parenchyma is minimally increased in images with HSFA. The overall visual preference of the images reconstructed on UHSFA was considered equal to or greater than that of those reconstructed on HSFA in 78% of images. CONCLUSION: The ultrahigh spatial frequency algorithm improved the overall visual quality of the images in pulmonary parenchymal high-resolution CT.
Humans ; Lung Diseases ; Lung* ; Noise

PURPOSE: To describe HRCT findings in five patients with pathologically proved acute interstitial pneumonia MATERIALS AND METHODS: This study included 5 patients with pathological and clinical diagnosis of acute interstitial pneumonia. Mean age of the patients was 40(range, 31-53 years). CT scans were reviewed by two chest radiologists retrospectively. CT scans were assessed for the presence and distribution of ground-glass attenuation, air-space consolidation, interlobular septal thickening, honeycombing, and pleural effusion. RESULTS: The area of ground-glass attenuation and air-space consolidation were seen at HRCT in all 5 patients. These lesions were distributed diffusely in both lungs, but involved predominantly subpleural lungs in 2 patients and posterior lungs in 3 patients. Three patients had mild interlobular septal thickening. None of them showed honeycombing. Three of the 5 patients died within 52 days of initial manifestation. CONCLUSION: Acute interstitial pneumonia differs from the more chronic form of idiopathic interstitial pneumonia in their HRCT findings.
Diagnosis ; Humans ; Idiopathic Interstitial Pneumonias ; Lung ; Lung Diseases, Interstitial* ; Pleural Effusion ; Retrospective Studies ; Thorax ; Tomography, X-Ray Computed

CT is a highly accurate method of detecting and clarifying the narure of space-occupying lesions within theliver nd pancreatic disease. It was found to be a reliable, non invasive method for detecting the lesion. A normalrange of attenuation values were obtained from 71 CT examinations of the upper abdomen, that is liver, spleen,pancreas, aorta, before and after contrast enhancement in whom no radiologic or laboratory abnormality of theseorgans were detected from March to Sept. 1983. The results were as follows; 1. The age distribution was from 28years to 71 years. The sex ratio was 45 male to 26 female. 2. Mean Hounsfield Units (HU) in liver before contrastenhancement and after contrast enhancement liminute, 3 minutes, 5 minutes, 10 minutes were 56.1±3.85, 75.0±4.77,82.0±3.71, 84.3±2.76 and 88.2±3.95 HU respectively. 3. Mean Hounsfield Units in pancreas before contrastenhancement and after contrast enhancement 1 minute, 3 minutes, 5 minutes, 10 minutes were 43.0±4.30, 66.5±4.27,71.2±2.39, 74.4±3.00 and 79.2±2.(0 HU respectively. 4. Mean Hounsfield Units in spleen before contrastenhancement and after contrast enhancement 1 minute, 3 minutes, 5 minutes 10 minutes were 53.0±4.31, 71.4±2.84,75.3±2.70, 80.5±3.04 and 83.2±2.14 HU respectively. 5. Mean Housfield Units in aorta before contrastenhancement and after contrast enhancement 1 minute, 3 minutes, 5 minutes 10 minutes were 45.1±5.39, 86.7±6.86,92.5±5.33, 106.8±4.12 and 114.1±5.02 HU respectively. 6. The most significant finding was that the livernormaly had the highest attenuation values of any of the organs measured. When another viscera in upper abdomenhad a attenuation value greater than that of the liver, this reflected abnormal lesions.
Abdomen ; Age Distribution ; Aorta ; Female ; Humans ; Liver ; Male ; Methods ; Pancreas ; Pancreatic Diseases ; Sex Ratio ; Spleen ; Viscera

PURPOSE: The chemoembolization with Lipiodol and doxorubicin hydrochloride is used in patients with hepatocellular carcinoma. What condition is the ideal emulsion of Lipiodol and doxorubicin for excellent anticancer effect? METHOD AND MATERIALS: Microscopic evaluation was performed on the emulsions, which were varied with different specific gravities of doxorubicin solutions, degrees in mixing of the emulsion, and amount of Lipiodol. RESULT: 1. Maximal amount of doxorubicin solution was contained in Lipiodol droplets and the release of doxorubicin from the droplets were delayed, when specific gravity of doxorubicin was equal to that of Lipiodol (SG, 1.28). 2. The optimal therapertic ratio of Lipiodol and doxorubicin was 3:2 at least, as in the emulsion less than 3:2, unmixed free forms of doxorubicin solution were increased. 3. The emulsion mixed by pumping 50--100 times had smaller Lipiodol droplets and contained larger amount of doxorubicin solution in the droplets than by pumping 20 times. CONCLUSION: We recommend the emulsion with specific gravity of doxorubicin equal to Lipiodol (SG. 1.28), the ratio of Lipiodol and doxorubicin closo to 3:2, and the mixture prepased with puming 50--100 times.
Carcinoma, Hepatocellular* ; Doxorubicin ; Emulsions ; Ethiodized Oil ; Humans ; Specific Gravity

Two cases of ureteral fibrous polyp showing serpiginous filling defect on IVP are presented with characteristic radiologic features; easy flow of contrast medium around polyp. Prolapsed polyp in urinary bladder, and less ureteral obstruction or renal damage than in epithelial lesions. These rediologic findings enable to differentiation of ureteral fibrous polyps from malignant tumor, which is helpful for determining therapeutic approach.
Polyps* ; Ureter* ; Ureteral Obstruction ; Urinary Bladder

PURPOSE: To evaluate the pattern of distant lymph node metastasis in colorectal carcinoma and its correlation with distant organ metastasis. MATERIALS AND METHODS: We retrospectively reviewed abdominal CT scans of 46 patients with pathologically proven colorectal carcinoma. RESULTS: The incidence of distant lymphadenopathy in colorectal carcinoma was 30.4%(14/46). The most commonly involved distant lymph node was the left paraortic lymph node below the renal hilum(9/25). The most common type of distant lymphadenopathy was solitary type(7/14) and all of these lymphadenopathies were noted in the left paraortic lymph node below the renal hilum. Six cases of left sided colorectal carcinoma showed left paraortic lymphadenopathy with solitary type. The incidence of distant organ metastasis was 17. 4%(8/46) and markedly increased if distant lymphadenopathy was multiple and confluent, or confluent type(5/7). CONCLUSION: The incidence of distant lymphadenopathy in colorectal carcinoma was not high and the most common lymphadenopathy was the left paraaortic lymph node with solitary type below the renal hilum. The possibility of distant organ metastasis was high if distant lymphadenopathy was multiple and confluent, or confluent type.
Colorectal Neoplasms* ; Humans ; Incidence ; Lymph Nodes* ; Lymphatic Diseases ; Neoplasm Metastasis* ; Retrospective Studies ; Tomography, X-Ray Computed

No abstract available.
Lymphangioleiomyomatosis* ; Tuberous Sclerosis*

No abstract available.
Animals ; Rats* ; Stomach*