[en] Review of papers for methods of measuring sizes of ventricles and CSF space on CT revealed many different ways including subjective, linear, planimetric and volumetric methods. Results of these measurements were also reviewed and discussed together with our own study about normally acting elderly volunteers and patients with dimentia. The left lateral ventricle was significantly larger than the right. Sizes of ventricles and CSF spaces increased with aging. These differences were significant among five different age groups in female (younger than 60, sixties, seventies, eighties and older than 90). In male these differences were not significant among several age groups mainly because of a small number in an age group. There was no significant difference of sizes of ventricles and CSF space between male and female. The two variates analysis between sizes of ventricles and CSF space showed rightward shift of two main components in dementia compared with normal group. (author)

[en] The CT findings of seven cases of thymoma were examined. The results were as follows: 1. Invasive thymoma frequently showed a plaque-like and irregularly marginated mass with obliteration of the translucent line between the tumor mass and the adjacent structures. Non-invasive thymoma showed nodular lobulated mass and the translucent line was well preserved. CT was useful to dicriminate between invasive and non-invasive thymoma. 2. One case of invasive thymoma had egg-shell calcification between tumor mass and stroma. On the other hand, germ cell tumor has rough-spoty calcifications in the tumor. (author)

[en] Splenic tumor is a relatively uncommon disease. Although a number of studies have been conducted on the usefulness of angiography in the qualitative diagnosis of splenic tumor, the number of reports on its computed tomogram is quite limited. We experienced 8 splenic tumors and made a comparative study of their computed tomograms and angiograms. It turned out that computed tomography was very useful in the qualitative diagnosis as well as angiography. In this paper, we reported the characteristics of the computed tomograms of the splenic tumors with some discussion. (author)

[en] The CT scan was performed preoperatively on 42 out of 54 cases with malignant tumors of the nose and of paranasal sinus origin, who had received radiation therapy from January, 1978 to March, 1980. These cases consisted of 38 squamous cell carcinomas, one osteosarcoma, one M.F.H., one malignant lymphoma and one hemangiopericytoma. The CT scan was confirmed to be superior in the following points as compared with other diagnostic methods: I) the determination of the extent of tumor invasions. II) the easier and more objective determination of staging. III) the visualization of intratumor structures. IV) the detection of intra-orbital recurrence. However it was impossible to differentiate tumors from inflammatory lesions. (author)

[en] DSA of the cavernous sinus was performed in 31 patients, 33 times, via the orbital venography except for a case performed from the inferior petrous sinus. Because of good contrast resolution of DSA, sufficient quality of images were provided with diluted contrast material. Dilution of contrast material relieved patients from heat sensation or pain, and made it possible to use finer needle for a puncture. Continuous images of DSA was diagnostic for filling defects, that is to be able to observe a moment entrance of contrast material into the false filling defect. DSA of orbital venography should be the procedure of first choice for the cavernous sinography. (author)

[en] Planar, SPECT, X-CT, and angiography were compared in 47 patients with suspected SOL in the liver. SPECT had greater sensitivity and specificity in detecting SOLs than planar. Especially the detection of SOL less than 3 cm was improved, and the smallest SOL detected by SPECT was 1.0 cm in diameter. SPECT appears reliable procedure for screening SOLs in the liver. Compared with X-CT, SPECT had nearly equal sensitivity in detecting SOLs more than 3 cm, and X-CT had higher sensitivity in detecting SOLs less than 3 cm. But in some cases, for example isodensity SOL, SPECT could detect the SOL which was missed by X-CT. (author)

[en] The value of ultrasonography (US) and computed tomography (CT) in determining the site and cause of obstructive jaundice in 65 cases is described. The detection rate of the site of obstruction was 88 % with US and 83 % with CT. US and CT could detect the cause of obstruction in 66 % and 54 % respectively. (author)

[en] Twelve patients with 14 neurinomas were studied with a 0.5-T superconductive magnetic resonance (MR) imager. Neurinomas appeared as hypointense lesions with the surrounding gray matter of the brain on T₁-weighted images and as hyperintense lesions on T₂-weighted images, and showed heterogenous intensities. It seems to be able for differentiating neurinomas from meningiomas from these intensities. (author)

[en] Two cases of acute focal bacterial nephritis (AFBN) are examined and followed-up with ultrasound and CT. AFBN is detected by US or CT, but precise nature, especially in differentiation from renal tumor, may be difficult to determine. Clinical features and follow-up studies after medical treatment are important aid in the differentiation. (author)

[en] Eighty-six patients with carcinoma of the uterine cervix were treated with radiation therapy for the paraaortic lymphnodes area at 10 of the participating institutions in Kansai Cancer Therapist Group from January 1980 to December 1982. Three-year survival rates according to treatment policy were as follows; gross metastatic lesion, 30 % and microscopic metastatic lesion, 60 %. Significant prognostic factor of gross metastatic lesion was the interval between primary treatment and paraaortic lymphnode irradiation. Corresponding factor of microscopic metastatic lesion was T-stage of the primary lesion. (author)