Zhonghua fang she xue za zhi Chinese journal of radiology最新文献

Dynamic CT manifestations in 44 cases of hepatic tumors proved by pathology were reviewed. 30 were hepatoma, 6 metastatic tumor, 7 cavernous hemangioma and 1 adenoma. 50 ml of contrast medium were administered as a bolus injection, and scanning was performed at 15, 25, 60, 120 and 300 sec after injection. The tumor enhancement patterns were divided into 3 types based on time-density curve. Type 1 manifested rapid and prolonged marked tumor enhancement; Type 2 was characterized by a rapid rise followed by a rapid decline in tumor density; In type 3 there was no significant change over time in density of the tumor. All cavernous hemangiomas belonged to type 1. Type 2 and 3 were not specific. Parafocal enhancement which occurred in 83.3% of primary hepatic carcinoma in this article and without false positive cases was considered by the authors to be pathognomonic of hepatoma. Evaluation was also made of dynamic CT in treatment planning of hepatic tumors.

X-ray investigation was made on the knee joint in 122 individuals, both AP and lateral radiographs were taken. The result showed that the intercondylar eminence of tibia develops at a certain period after birth, the time to make its appearance is 6-10 years for female and 7-10 years for male. The initial appearance often takes the form of a localized prominence usually single. The various configurations of the intercondylar eminence, the angle, height and density were described.

This article is a prospective research on parametric imaging of DSA. With the help of phantoms, the authors finished the transformation of videodensity into iodine concentration. The value of iodine concentration will be used as the basis of parametric imaging instead of videodensity which is a non-dimensional value. In part "I" of this article, the authors obtained a group of attenuation curves of 24 iodine samples, which are energy dependent, and verified the possibility of transformation of videodensity into iodine concentration under the non-standard conditions. In part "II", the authors designed a group of phantoms and an exposure program in order to accomplish the density-concentration transformation under clinical conditions. The feasibility of the method was confirmed.

22 patients with Cushing's disease were treated in our hospital from 1976 to 1983. 18 patients were treated by adrenal surgery combined with pituitary irradiation, while 4 patients by radiotherapy of pituitary alone. Overall effective rate was 94%, 82% of patients were able to return to work. Adrenal resection followed by radiation of the pituitary had a relapse rate of 9.1%. The relapse rate was increased to 85.7%, if post-operative radiation was not given. The authors proposed that for young patients with mild disease, radiotherapy alone for pituitary yields good results. As post-operative radiotherapy radiation should be started 2 weeks to 2 months after adrenal operation. Two opposing lateral preauricular portals together with one prefrontal midline portal are preferable and can effectively reduce the dose to the normal brain, the recommended dose is DT 40-50 Gy.

The X-ray findings in 51 cases of neuroblastoma were analysed. The aim of plain film of abdomen is to search for fine sandy calcifications in the abdominal mass, paravertebral widening at lower thoracic region, and bone metastases. Displacement and deformity of kidney by extrinsic pressure seen in IVU are useful in differentiating an extrarenal tumor from intrarenal one. Ultrasound and CT are superior to IVU in localization diagnosis and defining the extent of abdominal neuroblastoma. Thoracic neuroblastoma usually manifests as a posterior mediastinal tumor associated with rib changes and the chest film remains valuable in diagnosis of this condition. It is mandatory to screen the patient for skeletal metastases radiographically and to investigate the bone marrow, and urine VMA whenever abnormalities are found in abdominal or thoracic imaging. The significance of combined imaging techniques in staging of neuroblastoma was discussed, and a simple diagnostic approach was proposed.

Twenty-one postmortem specimens of the liver (18 normal livers, 3 liver metastases) with attached ligamentum teres were investigated using silicone rubber injection technique. In all cases, the paraumbilical veins were demonstrated. They were usually divided into 2 groups, one on the right and the other on the left side of the ligamentum teres, and they terminated in a variable manner into small peripheral portal vein branches in the liver parenchyma. A patent proximal segment of the umbilical vein was found in 7 of the 21 cases. Connections between the umbilical vein and paraumbilical veins were supposed to represent one of the collateral channels in portal hypertension.

Eighteen cases of osteogenic sarcoma of the long bones in the extremities were analyzed in this paper. The pathological basis of the X-ray signs was explained. It was suggested that solitary calcific shadow appearing near the knee joint in young individuals should alert the radiologist to the possibility of osteogenic sarcoma. The X-ray findings of osteogenic sarcoma were characterized by dissociation of osteolysis from ossification. Simultaneous bony destruction both inside and outside the cortex was one of the patterns of erosive bone destruction in osteogenic sarcoma. The distinction between benign and malignant bony spicules, the differences in the relationship between soft tissue mass and subcutaneous fat layer and that between osteomyelitis and the subcutaneous fat layer were discussed.

This article reported the result of analysis of 96 cases with heaps of calcifications in the breast all verified by operation. The calcifications, according to the appearances on X-ray film were classified into 4 patterns: club-shaped, fine sandy, fragmented stonelike and coalescent. A comprehensive analysis was made in regard to spatial distribution and amount of calcification and the presence of a mass. The results indicated that club-shaped calcification is highly suggestive of malignancy regardless of the amount of calcification and the presence or absence of a mass. Simple fine sandy calcification in the absence of a mass can not differentiate benign from malignancy because of wide range of overlapping, whereas simple fragmented stone and coalescent types, according to the authors opinion denote benign.

In order to improve visualization of the portal vein, an experimental comparative study of enhancing arterial portography with four vasodilators was conducted in 8 dogs and the hemodynamic changes observed after administration of these agents. This study confirms that prostaglandin E1. Vasoactive intestinal peptide and anisodamine can improve the image quality of portal vein in arterial portography, but priscoline is less effective. The mechanism, and technical factors involved and the clinical application of pharmaceutical-arterial portography were discussed. This study also provided the experimental data for a wide choice of vasodilators in enhancing visceral angiography.

The non-lymphomatous lymphoid disorders of the chest are rare conditions characterized by infiltration of the pulmonary interstitium with lymphocytes and plasma cells. This article reported 6 pathologically proved cases, including Castleman's disease (3), pseudolymphoma (1), angioimmunoblastic lymphadenopathy (1), and lymphomatoid granulomatosis (1). The X-ray findings of these lesions were rather characteristic. In our series, the chest film showed large patchy areas of consolidation sometimes with the presence of air bronchogram in pseudolymphoma and lymphomatoid granulomatosis, simulating bronchiolo-alveolar carcinoma or pulmonary lymphoma roentgenologically. However, the former developed very slowly with little clinical symptoms. Most of the Castleman's disease in this series were found in young adults showing conspicuous, sharply marginated mediastinal node enlargement. Recognition of the aforementioned signs would bring about greater diagnostic accuracy.