Objective To explore the diagnostic value of 16-slice Spiral CT pulmonary angiography(16-SCTPA) in diagnosing pulmonary embolism(PE).Methods 13 patients suspected with PE were examined with 16-slice spiral CT pulmonary angiography.The volume data of all patients were reconstructed with the 3D techniques including multiplanar reconstruction(MPR) and maximum intensity projection(MIP),and CT features were analysed.Results In 13 patients,58 thrombosed pulmonary arterial branches were displayed by CT-PA,including 3 main pulmonary arteriae,18 lobar arteriae,22 segmental vessels,15 subsegmental or sub-subsegmental arteriae.Conclusion 16-slice Spiral CT pulmonary angiography is non-invasive,fast,and highly accurate method,it would be the modality of choice for the diagnosis of PE.

Objective To improve the recognition and reduce the misdiagnosis of bipartite patella by analyzing and summarizing the imaging features.Methods X-ray,CT and MR images of 1 7 cases of bipartite patella were collected,imaging features were ana-lyzed and summarized.Results X-ray revealed the smooth interface of the main and accessory patella fragments with sclerotic mar-gins,the cleft was slightly wide but not sharp.CT showed the bone sclerosis of interface was mostly smooth,rough and vesicular interface could also be found in a few patients,low density soft tissue could be found in separation zone.MRI could detect the intact but thinned cartilage covering the main and accessory patella fragments,fibrous like tissues could be found in separation zone with MRI.Conclusion Imaging findings of bipartite patella are characteristic,these features are helpful in the diagnosis and differential di-agnosis of bipartite patella.

ObjectiveTo investigate the value of combined digital mammography and Color Doppler Mammasonography in the diagnosis of the breast carcinoma with ROC analysis.MethodsFifty female patients with breast carcinoma and fifty female patients with breast benign lesions confirmed by means of surgery and histopathological examinations were studied.All patients were examined by Digital Mammagraphy and Color Doppler Mammasonography.Images of all patients were sorted and divided into three groups,Digital radiographs of all patients was the first group,and the second group was Color Doppler photographs,and the third was included the above two photographs.Each group was evaluated respectively by three radiologists independently.The diagnostic result of breast carcinoma or benign lesions were investigated with a five point confidence-rating scale:(1)definitely positive;(2)probably positive;(3)indeterminate;(4)probably negative,and(5)definitely negative.ROC analysis was made with SPSS 11.0 software.The differences of the area under the curve for each group was made by Z test.ResultsThe average number of breast carcinoma diagnosed by three radiologists with digital mammography,Color Doppler Mammasonogaraphy and both of them was 42,38,and 48,respectively;and the average number of breast benign lesions was 40,43,and 47,respectively.The sensitivity and specificity for digital mammography was 84%(42/50),80%(40/50),and they were 76%(38/50),86%(43/50)for Color Doppler;and 96%(48/50),94%(47/50)for two modes combination.ROC analysis indicated that the average area under the curve was 0.852 for Digital Mammagraphy,0.825 for Color Doppler,and 0.952 for both combined.For digital mammography combined with Color Doppler Mammasono-garaphy on diagnosis breast carcinoma,the area under the curve(Az)was significally larger than that for digital mammography(Z1=2.183,P＜0.01),and also larger than that for Color Doppler Mammasono-garaphy(Z2=2.581,P＜0.01), respectively.Conclusions Among three medical imaging modes on diagnosing breast carcinoma,the diagnostic value of digital mammography combined with Color Doppler Mammasono-garaphy was the highest. It was helpful on detecting and diagnosing breast carcinoma early.