CT Diagnosis of Renal Leiomyosarcoma / 医疗卫生装备

Objective To discuss the CT manifestations of renal leiomyosarcoma. Methods 9 cases of renal leiomyosarcoma proved by pathology were analyzed retrospectively. Results CT imaging showed homogeneous hyperattenuation in two cases. Heterogeneous in density with necrosis inside was observed on the CT scan in six cases. After contrast medium administration heterogeneous enhancement with cystic and necrotic areas could be revealed in all cases on both CT scan. Conclusion Large renal mass with intra-tumor necrosis,cystic and hemorrhagic change is the characteristic manifestations of renal leiomyosarcoma. But differential diagnosis from renal carcinoma by CT clinical setting is difficult before surgery, and final diagnosis should depend on pathology examination.

Comparative Study on Computed Radiogram (CR) and Conventional Chest Film in Diagnosing Lung Cancer / 实用放射学杂志

Objective To determine the efficacy of computed radiogram (CR) of chest in the diagnosis of pulmonary carcinoma.Methods There were 56 cases of pulmonary carcinoma confirmed by pathology including 34 cases of central pulmonary carcinoma and 22 cases of periphral pulmonary carcinoma in this paper.Four kinds of chest CR images (plain CR,wide CR,HE-CR and LE-CR) and two kinds of chest CR tomogmphic images (plain CR tomogram and HE-CR) were compared with conventional X-ray (CXR) and conventional tomogram (CTomo)respectively in showing normal structures and abnormal shadowes tomogram.Results The normal structure were displayed more clearly by CR than by CXR,except wide CR and HE-CR in showing right inferior pulmonary artery.The central pulmonary carcinoma was displayed more clearly by CR and LE-CR than by CRX in all aspects.The airways were involved displayed much more clearly by wide CR than by CXR.The display of peripheral vessels and inside densiy of neoplasm was similar on wide CR and CXR films,but the mass margins were abscure on wide CR.HE-CR displayed less clearly than CRX in all aspects.In the peripheral lung carcinoma,plain CR and LE-CR played the better in display of neoplasma margin and cavity in tumor than CXR did, but CXR displayed the margin clearly than wide CR did.HE-CR displayed all of the signs less clearly than CXR did. The indexes displayed by CR tomo were all bettre than that done by CXR tomo.Conclusion All kinds of CR (including CR tomo) images of chest have advantages in displaying normal strcture and neoplasma signs, versus CXR and CXR tomo images. Synthesizing the adventages of various CR(including CR tomo) images,the observator can find more signs to improve the accuracy of diagnosis of pulmonary carcinoma.