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

125 eosinophilic granulomas of the bone in 61 cases were reported. The radiologic manifestations may be summarized as follows: (1) Multiple lesions may occur with vertebra plana; (2) Epiphyseal lesion may be primary or secondarily involved by extension from metaphyseal lesion; (3) Metaphyseal lesion usually presents as an eccentric cystic area or central oval area of lucency; (4) The diaphyseal lesion manifests a "hole within hole" appearance; (5) The tarsal bone may exhibit a "bone within bone" sign; (6) Periosteal Codman triangle may be present.

The roentgen findings of 17 cases of parosteal osteosarcoma were analyzed. In 13 of them, a patho-radiologic correlative study was conducted. The results showed that there was an obvious relationship between the radiologic pattern and the degree of malignancy. On roentgenogram, tumor with dense ivory bone as the main manifestation is mostly lower in malignancy, while cotton-like and spiculate tumor bone usually denotes higher degree of malignancy. The pathological basis of the radiolucent area inside the tumor, the satellite nodules in the vicinity of the tumor as well as the differential diagnosis were discussed.

This paper reported 21 cases of myasthenia gravis. All investigated by laboratory tests, conventional chest X-ray study and CT scan, and documented by surgery and pathology. There were 9 cases of thymoma, 2 thymic cyst, 8 normal thymus, 1 atrophic thymus and 1 thymic hyperplasia. In this series, the diagnostic accuracy rate of CT scan was over 90%. Of course, CT is a highly efficient technique for evaluation of abnormalities of thymus, but high resolution CT scanner and the ability of correct interpretation of CT image are even more important.

The morphology and function of the femoral vein and its valves in normal and abnormal groups were analysed and compared in 334 cases (414 lower limbs) by ascending and descending phlebography. The diagnostic criteria were established in the normal and abnormal femoral vein and its valves using statistical analysis. Three types of the femoral valvular incompetence were proposed and the value of ascending and descending phlebography in the diagnosis of femoral valves was discussed.

32 cases (94 times) of selective bronchial arteriography (BAG) and bronchial artery infusion (BAI) were reported. The arteriographic manifestations in several diseases and the relationship between the arteriographic features and histological types of bronchial carcinoma were described. The clinical applications of BAG and BAI were briefly discussed.

74 patients with various intracranial tumors were studied by means of dynamic CT, among them 45 cases were confirmed by operation and pathology. In analyzing the time-density curve and the ratio of increase in CT number of the tumoral tissue to that in the arterial lumens (tissue-blood ratio, TBR), we found that: (1) Dynamic CT technique is safe and easy to perform suitable for out-patients; (2) The time-density curves in acoustic neurinoma, meningioma, glioma and metastatic tumors are different from each other because of difference in vascularity and the degree of B.B.B. breakdown. Meningioma curve shows a rapid rise to the peak followed by a subsequent plateau; (3) TBR at the peak time (TBRp) is useful as an index for tumor. Combined analysis of time-density curve and TBRp is helpful for tumor differentiation.

A radiologic-pathologic correlative study was carried out on 43 cases with fibrous dysplasia of the facial bones with emphasis on basis for radiological diagnosis. The x-ray manifestations according to density changes are classified into three types: sclerotic, osteolytic and mixed. The lesion extends along the longitudinal axis in the mandible whereas in the maxilla, the lesion spreads in a diffuse pattern along the wall of the maxillary antrum with preservation of maxillary contour. The authors considered that fibrodysplasia and ossifying fibroma are different disease entities and should be distinguished by combination of clinical, radiologic and pathologic evidences.

This article presented the X-ray plain films and myelograms of 108 patients with lumbar disc herniation and comparative study was made with operative findings. The diagnostic accuracy was 92.8%. Hypertrophic changes with lipping at posterior margin of the vertebral body and narrowing of anterior part of disc space with widening of the posterior part were useful signs for localizing the herniated disc. The myelographic signs of pressure on dural sac and nerve roots were evaluated for its significance in localization of the lesion and differential diagnosis. The X-ray manifestations of L S1 herniation were described in detail.

Intracranial vessels were evaluated in 600 patients with IADSA. Among them, 100 cases were studied with both conventional angiography and IADSA. The advantages of IADSA are: (1) Good image quality; (2) Examination time shortened; (3) Very useful for interventional neuroradiology, hence it can replace conventional cerebral angiography for preoperative evaluation in most cases.

100 cases of cervical spondylotic myelopathy were studied with both CTM and conventional myelography and the results were compared. It was shown that CTM possesses more advantages over its counterpart as follows: (1) CTM can demonstrate with a higher degree of accuracy the size and configuration of the spinal cord, its internal composition and cystic necrosis, can pick up more herniations, hard and soft, up to 16% (39/252) and better define the position left, middle and right of the protrusion. (2) CTM is capable of making a correct diagnosis of cervical myelopathy and cystic necrosis in the cord. Analysis also showed that the degree of changes of spinal cord seen on CTM correlation closely with severity of the clinical picture. Atrophy and cystic necrosis of the cord are important factors accounting for clinical deterioration and operative failure.