Results 1 - 10 of 48
Results 1 - 10 of 48. Search took: 0.038 seconds
|Sort by: date | relevance|
[en] In 126 cases and who were diagnosed as esophageal cancer and treated by radiation at Cancer Research Hospital, K. A. E. R. I., from January 1974 to July 1979, a study on the x-ray diagnosis of esophageal cancer was carried out mainly as to the type classification. The ordinary classification od esophageal cancer by x-ray picture was reviewed and Borrmann's classification using gastric cancer was tried to apply to the macroscopic classification of esophageal cancer, and also the application of this classification to x-ray diagnosis was discussed. And the effect of radiotherapy as to each type of cancer according to the ordinary x-ray classification and Borrmann's classification was studied too. The results were as follows: 1. The ordinary x-ray classification was not simple, because the degree of progression of cancer, difference of mural invasion, and position and method of radiography could make misinterpretation of the type of cancer and the therapeutic effect by radiation as to each type according to this classification did not represent a significant characteristic too, although the radiation was most effective in the polypoidal type and least effective in funnel type. 2. The Borrmann's classification was relatively easy even on the radiogram because of little overlapping between each type and the type became more evident on the resected specimen after operation. And also some correlation was recognized between the type of Borrmann's classification and radiotherapeutic effect. The effect was best in type I and It was gradually decreased in type II, III, and IV in the other. The radiotherapy was ineffective in about three quarters of type IV. 3. The Borrmann's classification is now employed to the carcinoma of large bowel, as well as to the gastric cancer. If it is applied to the esophageal cancer, the macroscopic classification for the cancer of digestive tract can be systemized and it will be convenient in clinical study.
[en] The presence of dilatation of the right descending pulmonary artery is a reliable roentgenologic sign of pulmonary hypertension, though no linear correlation exists between pulmonary artery widths and pulmonary artery pressure. And so, at the first, the author measured the right descending pulmonary artery on both inspiratory and expiratory chest roentgenograms of 200 normal male adults and 200 normal female adults, using Chang's method, to obtain normal value of measurement in Korean. The results were as follows; 1. In males, the range of the right descending pulmonary pulmonary artery measurements was 9-16 mm in inspiration and 8-15 mm in expiration. The mean inspiratory measurement was 14.0 mm as compared to 12.1 mm for the expiratory measurement. The range of difference between inspiratory and expiratory measurement was 1-3 mm (1 mm in 44 cases, 2 mm in 138 cases, and 3 mm in 18 cases). The mean difference was 1.9 mm. 2. In females, the range of measurement of the right descending pulmonary artery 9-16 mm with a mean measurement of 12.9 mm in inspiration. The expiratory measurements showed a range of 8-14 mm, with a mean measurement of 11.1 mm. The range of difference between inspiratory and expiratory measurements was 1-3 mm (1 mm in 62 cases, 2 mm in 114 cases, and 3 mm in 24 cases). The mean difference was 1.8 mm. 3. There are apparent changes in the measurement of the descending pulmonary artery during respiration in normal adults. The size of the right descending pulmonary artery increases during inspiration and decreases during expiration. There were 1-3 mm difference between inspiratory and expiratory measurements. In 252 cases (63%). The difference was 2 mm.
[en] The sylvian triangle is the single most important vascular configuration in the angiographic localization of supratentorial hemispheric tumors. Vlahovitch et al. recently described a new system for measuring the sylvian triangle on the lateral cerebral angiogram and thereafter Gonzales et al. evaluated the Vlahovitch system, using computer programing, and reported its diagnostic values and advantages. The present study was designed to contain normal measurements of the sylvian triangle in Koreans. The author measured all extremities, angles, height, and superior insular line of the sylvian triangle in 100 lateral carotid angiograms of 68 males and 32 females, which were considered anatomically normal. The results were as follows: 1. Extremities of the sylvian triangle: The anterior extremity (a) of the sylvian triangle was close to or on the line MM' in the great majority of the cases and, on the average, lay 1.55 mm (SD ± 1.01 mm) behind the line. The posterior extremity (b) lay 15.05 mm (SD ± 6.49 mm) behind the line AA' and the inferior point (c) lies at the junction of one-fourth of AA' and one-third of AO with a variation of 3.82 mm (SD ± 1.70 mm) in all directions, on the average. 2. Angles of the sylvian triangle: The mean anterosuperior angle (i) was 70 .deg (2SD ± 6.67 .deg), and the mean posterior angle (ii) was 31 .deg (2SD ± 6.50 .deg), and the men inferior angle (iii) was 79 .deg (2SD ± 7.34 .deg). 3. The height of the sylvian triangle (cn) was found to be one-fourth the hemispheric height and the mean height was 2.83 mm (SD ± 0.23 mm). 4. Superior border of the sylvian triangle: The superior insular line is located 6.22 mm (SD ± 3.66 mm), on the average, below the midpoint of the hemispheric height (X).
[en] Each organ of body has many normal variation and/or abnormal developments from fetus to adult, especially urogenital system is very complex and markedly abnormal. The authors attempt to analyze the natures, incidences and differences of each normal variations based on I.V.P. series of 1000 Korean females and the review of literatures were carried out. The results are as follows: 1. The normal variations of urinary tracts are about 30 kinds as follows; Aphasia 0/1000 (0%), Hypoplasia 4/1000 (0.4%), Atrophic kidney 0/1000 (0%), Hyperplasia 0/1000 (0%), Hypertrophied kidney 0/1000 (0%), Supernumerary kidney 0/1000 (0%), Pelvic kidney 0/1000 (0%), Wandering kidney 7/1000 (7%), Horseshoe kidney 2/1000 (2%), Nephroptosis 6/1000 (0.6%), Malroated kidney 0/1000 (0%), Crossed ecotopic kidney 0/1000 (0%), Ureteral kingking 440/1000 (44.0%), Short ureter 3/1000 (0.3%), Long ureter 49/1000 (4.9%), Retrocaval ureter 0/1000 (0%), Retroiliac ureter 0/1000 (0%), Mega-ureter 0/1000 (0%), Aberrant vessel in ureter 79/1000 (7.9%), Congenital ureteral valves 0/1000 (0%), Anomalous ureteral orifices 0/1000 (0%), Double ureter 22/1000 (2.2%), Ureteral diverticulum 0/1000 (0%), Extrarenal pelvis 170/1000 (17.0%), Intrarenal pelvis 830/1000 (83.0%), Supernumerary pelvis 55/1000 (55%), Renal backflow 2/1000 0.2%), Multiple calyces 0/1000 (0.1%), Calyceal diverticulum 2/1000 (0.2%), Unilateral fused kidney 0/1000 (0%), Polar enlarged kidney 0/1000 (0%). 2. The order of incidence of common variations in Korean females are as follows: 1. Intrarenal pelvis 2. Ureteral kingking 3. Extrarenal pelvis 4. Aberrant vessel in ureter 5. Double pelvis 6. Long ureter 7. Double ureter 8. Wandering Kidney 9. Nephrotosis 10. Hypoplasia 11. Short ureter 12. Horseshoe kidney 13. Renal backflow 14. Calyceal diverticulum 15. Supernumerary calyces. 3. The most common variations in Korean females are intrarenal pelvis, extrarenal pelvis, aberrant vessel in ureters and most of them are acquired origin. Contrary, those in foreigners are double pelvis and double ureter resulting from congenital congenital origin and the pattern s different from Koreans. 4. The most rare variation is multiple calyces in Korean females.
[en] CT findings in 64 patients of nasopharyngeal cancer are analyzed retrospectively to evaluate the region of origin and the route of spread. The results are as follows: 1. The most frequently involved wall is lateral well (90%), followed by posterior wall (78%) and superior wall (58%). 2. There are invasion to parapharyngeal space (86%), retropharyngeal and prevertebral space (72%), carotid space (46%), and masticator space (18%) in that order. 3. Involved anatomic sites are Rosenmueller fossa (90%), torus tubarius (78%), E-tube orifice (68%), carotid sheath (46%), soft palate (50%), nasal cavity (36%), skull base (28%), prevertebral muscle (26%) and intracranial fossa (16%). 4. Direct extension to intracranial fossa is via sphenoid sinus (6/8), foramen lacerum (5/8), foramen ovale (4/8), and jugular foramen (4/8) in that order. 5. Invasion to prevertebral space leads to intraspinal extension (3/13). 6. Cervical lymph node metastasis of found in internal jugular (82%),spinal accessory (56%) and retropharyngeal chain (42%) in that order. 7. After radiation therapy, most frequent site of recurrence is posterior wall (10/14) followed by lateral wall (9/14), superior wall (5/14) and cervical lymph node (6/14), but the presence of recurrence is difficult to determine based on CT only
[en] To obtain objective and comparable data for mechanical characteristics of self-expandable metallic stents widely used in the treatment of biliary obstruction. The stents tested were the 6 and 8 mm-band Hanaro spiral stent, Gianturco-Rosch Z stent, Wallstent, Ultraflex stent, and Memotherm stent. Each was subjected to three types of load:point, area, and circular. We analyzed their mechanical characteristics (resistance force, expansile force, and elasticity) according to these three types of stress. With regard to point loads, the Memotherm stent showed the highest resistance force and expansile force. The 8 mm-band Hanaro stent showed the lowest resistance force and the Gianturco-Rosch Z stent and Ultraflex stent showed lower expansile force. With regard to area loads, the Ultraflex stent showed the highest resistance force. The 6 mm-band Hanaro stent, Gianturco-Rosch Z stent, and Ultraflex stent showed higher expansile force. The 8 mm-band Hanaro stent showed the lowest value in both resistance force and expansile force. For circular loads, the Memotherm stent showed the highest resistance force and the Ultraflex stent and Wallstent showed lower value. Under all types of stress, the Hanaro stent and Memotherm stent were completely elastic, and the Ultraflex stent and Wallstent showed a wide gap between resistance force and expansile force. In clinical practice, awareness of the mechanical characteristics of each stent might help in choosing the one which is most suitable, according to type of biliary obstruction. =20
[en] Fifty-nine histologically proven cases of carcinoma of the larynx and hypopharynx were examined with CT for the staging before surgery or radiation therapy and the findings of primary disease and neck metastasis were analyzed. Local extension of the tumor can be easily evaluated with CT and findings of lymph node metastasis of neck were seen in 33 cases (79%) of all. Among cases of neck metastasis, peripheral contrast enhancement of the lymph nodes were demonstrated in 26 cases (79%).
[en] Pulmonary ligament consists of 2 serosal of pleura that connect the lower to the mediastinum. Author analyse and present CT appearance of pulmonary ligament of the 40 normal and abnormal patients on the basis of anatomic knowledge from the cross section of cadaver. Left pulmonary ligament is more frequency visualized than the right. The most important CT landmark in localizing pulmonary ligament is the esophagus where the ligament attaches on its lateral wall. Pitfalls in CT identification of pulmonary ligament are right phrenic nerve and right pericardiacophrenic vessels which emerge from lateral wall of the IVC and wall of the emphysematous bulla in the region of the pulmonary ligament
[en] We retrospectively analyzed the clinical and CT manifestations of 12 patients with nonlymphomatous renal metastases from eight different sites. Primary sites were lung (2), liver (2), stomach (2), uterine cervix (2), pancreas (1), rectum (1), penis (1), and unknown primary site (1). In all patients, clinical symptoms and laboratory findings were nonspecific. Major CT findings of renal metastases were multiple, small, hypodense lesions concomitant with multiple organ involvement. Although there are few differential points between renal cell carcinoma and metastasis, the single most important differential point was the presence of mass lesion on location other than kidney and in such case, the lesion on kidney proved to be metastasis usually. In cases with remission of primary malignancy, biopsy of new renal lesion seemed to be indispensable
[en] To evaluate MR imaging findings of joint involvement in patients with osteosarcoma Among 166 patients with osteosarcoma treated between January 1993 and July 1998, 67(44 men and 23 women, mean age 20 years) whose tumors had invaded the epiphysis were included in this study. Those with preserved normal bone marrow signal intensity between the tumor and cortical bone were excluded. Tumors were located around the knee (n=52), the hip (n=7), the shoulder (n=5), the ankle (n=2), or the wrist (n=1). For all patients, pre-operative spin echo pre-and post-contrast enhanced MR images were obtained. In all cases, we assessed the presence or abscence of intrasynovial mass, intraarticular disruption of cortical bone and articular cartilage, and joint effusion, and also evaluated the mass around the cruciate ligaments of the knee. All patients underwent surgery and MR findings were correlated with the results of pathologic examinations. In six patients the tumor was found to involve the knee joint. Sensitivity and specificity for the intrasynovial mass (n=6), intraarticular disruption of cortical bone and articular cartilage (n=19), mass around the cruciate ligaments (n=7), and joint effusion (n=12) were 83.3%, 100%, 83.3%, 33.3% and 98.4%, 78.7%, 95.6%, 83.6%, respectively, while accuracy for the intrasynovial mass and mass around the cruciate ligaments was 97% and 94.2% respectively. If MR imaging indicates the presence of a mass in the synovial cavity or around the cruciate ligaments, this is suggestive MR findings of joint involvement