Objective To evaluate the value of 16-slice spiral computed tomography angiography(16SCTA) and reconstruction technique in the diagnosis of vascular diseases. Methods Using 0.75 mm collimation,1mm slice thickness and 0.5mm repitition,16SCTA was performed in 100 patients with suspected vascular diseases.Reconstruction methods were multiple planar reconstruction(MPR),maximum intensity projection(MIP) and volume rendering technique(VRT). Results 65 patients were proved by pathology or DSA in 100 vascular diseases,which included cerebral aneurysm(n=8),brain arteriovenous malformation(AVM,n=2),pulmonary AVM(n=6),pulmonary artery embolism with thrombus of the lower limb vein(n=9),pulmonary sequestration(n=4),coronary artery soft plaque and / or calcification(n=20),aortic aneurysm(n=12),renal artery stenosis(n=3),superior mesenteric artery thrombus(n=2),femoral artery stenosis(n=1),soft tissue hemangioma(n=33).Three reconstruction techniques showed the size,shape and extent of the lesion and displayed the lesion in any directions.VRT could display three-dimensionally the lesion.MPR and MIP could show the thrombus of lesion,MIP and VRT could display the calcification of lesion. Conclusion Application of every 16 SCTA reconstruction technique can display clearly lesion and replace DSA in diagnosis of vascular diseases,and provides another reliable diagnostic method for patients and has clinical importance for treatment.

Objective To summarize the echocardiographic characteristics and clinical signiifcance of prenatal diagnosis of coronary artery ifstula (CAF). Methods Images and follow-up results of ifve fetuses with CAF diagnosed by fetal echocardiography between January, 2011 and December, 2012 in our department were reviewed. Results Echocardiographic characteristics of CAF were a dilated coronary artery in the four chamber view and the left ventricular outlfow tract view. Track the course of the dilated coronary artery can conifrm the oriifce of the ifstula. Among the ifve cases, the oriifce of the ifstula included the aortic root of left ventricular outlfow tract, right atrium side of interatrial septum, the entrance of superior vena cava to right atrium, right ventricular apex and right ventricle cone. The colour Doppler lfow imaging showed turbulence in the dilated coronary artery. The spectral Doppler with the sampling gate in coronary artery showed the characteristic bidirectional lfow pattern. One case was associated with other complex intracardiac abnormalities and one case with persistent left superior vena cava. Among the ifve cases of CAF diagnosed by fetal echocardiography, one case was missed and four cases were conifrmed by postnatal echocardiography. Conclusion Coronary artery ifstula has special fetal echocardiographic characteristics. The fetal echocardiography plays an important role in early detection, diagnosis and treatment of CAF.

Objective To study the role of pulmonary angiography with 16-detector row spiral CT in the diagnosis of pulmonary embolism (PE).Methods Forty-nine patients suspected of having pulmonary embolism were examined prospectively with 16-detector row spiral CT pulmonary angiography.Contrast enhanced 3-mm section thickness was used to scan the entire chest and the raw data were used to perform the reconstruction with 1-mm section thickness and multiplanar reformation (MPR).The axial images of 3-mm,1-mm section thickness,and MPR were compared.Results PE were diagnosed in 42 of 49 patients,and 352 branches were detected,including 8 left or right main pulmonary arteries,96 lobar arteries,132 segmental vessels,and 116 subsegmental arteries.For displaying the emboli in main pulmonary arteries and lobar arteries,the results of the images with 3-mm,1-mm section thicknesses and MPR were identical.But 1-mm-thick section yielded higher rate of detecting emboli in segmental and subsegmental pulmonary arteries compared with 3-mm-thick sections,and there was significant difference statistically (P0.05).Conclusion 16-detector row spiral CT pulmonary angiography is non-invasive,fast,and highly sensitive for PE,and it should be the modality of choice for the diagnosis of PE.

Objective To investigate the echocardiographic features and clinical significance of prenatal diagnosis of fetal double aortic arch (DAA). Methods Totally 21 596 fetuses underwent fetal echocardiography in Nanjing Medical University Afifliated Suzhou Hospital and ifve cases were diagnosed as DAA by echocardiography. Echocardiographic characteristics, types and outcomes of these ifve cases were summarized retrospectively. Results Five fetal cases were diagnosed as DAA by fetal echocardiography. 1. Prenatal echocardiographic features:In three-vessel and trachea view, the normal“V”-shaped conlfuence formed by the aortic arch and ductal arch was absent. However, the ascending aorta bifurcated into the left and right aortic arch and these two arches encircled the trachea. Annular lfow signal around trachea was seen on color Doppler imaging. 2. Types:Among these ifve fetuses, three cases were called right arch predominant type, whose diameters of right arches were larger than those of left arches. The other two were balanced type, whose diameters of right arches were almost equal to those of left arches. 3. Accompanied malformations:Case 2 was accompanied with membranous ventricular septal defect and permanent left superior vena cava. Case 4 was associated by hemivertebrae. The other three cases had no other abnormalities. 4. Follow-up:These five cases were all arranged for MRI subsequently and all were confirmed by follow-up till to the induction of labor or three months after birth. Conclusions Double aortic arch is a kind of severe congenital heart disease. Echocardiography is the ifrst choice to diagnose DAA prenatally and three-vessel and trachea view are the effective cross sections in the diagnosis of double aortic arch.

Objective To investigate the fetal ultrasonographic features in pregnancies with Toxoplasma (TOX), rubella virus (RV), cytomegalovirus (CMV) and herpes simplex virus (HSV) infection. Methods From January 2011 to March 2013, prenatal ultrasound examination was performed in 545 fetuses with mothers of speciifc positive IgM of TOX, RV, CMV and HSV, detected by enzyme-linked immune sorbent assay (ELISA) in Nanjing Medical University Affiliated Suzhou Hospital. Ultrasonographic features were summarized and pregnancy outcome was followed up in fetuses with abnormal ifndings. Results Among the 545 fetuses, 56 cases with abnormal sonographic ifndings:6 cases with central nervous systerm abnormalities (2 intracranial calcifications, 4 hydrocephaly);9 cases with digestive system abnormalities (1 intrahepatic calcifications, 8 echogenic bowel);2 cases with heart abnormalities (1 interventricular septal defect, 1 right heart enlargement);17 cases with abnormal amniotic fluid volume (16 polyhydramnios, 1 oligohydramnios);3 cases with placental abnormality (1 thick placenta, 2 placenta abnormal calciifcation);13 cases with urinary systerm abmormality appearing as renal sinus separation;and 6 cases with other systerm abnormalities (1 neck lymphatic hygroma, 1 single umbilical artery, 1 sacrococygeal teratoma and 3 intrauterine growth restriction);2 cases of complicated abnormalities. Conclusions Prenatal ultrasonography is signiifcant in detecting serious fetal malformations, such as hydrocephaly, heart abnormalities and characteristic ultrasound features such as intracranial calciifcations, echogenic bowel, placenta abnormal calciifcation complicated with TOX, RV, CMV and HSV infection, providing valuable information for further clinical treatment, such as induced labour.

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Objective To summarize the characteristics of deltoid ligament rupture and explore the feasibility and shortterm clinical outcomes of targeted suture anchor repair technique according to the rupture site.Methods From May 2011 to October 2014,19 cases of complete deltoid ligament rupture (17 males and 2 females) were recruited in this study,with an average age of 34.15± 1.23 years (ranged from 15 to 60 years).According to Lauge-Hansen classification,there were 7 cases of pronation external rotation grade ⅣV injury,including 3 cases of Maisonnuve fracture;1 case of pronation abduction type Ⅲ degree injury,1 case of pronation abduction grade ⅣV injury;and 10 cases of supination external rotation grade ⅣV injury.According to AO / OTA classification,there were 9 cases of 43B type injury and 10 cases of 43C type injury.According to the rupture site of deltoid ligament,the targeted suture anchor repair surgery was operated respectively.Early mobilization with the help of hinged ankle brace was encouraged.The evaluation at last follow-up was based on the American Orthopedic and Ankle Association (AOFAS) criteria of ankle and hindfoot,and the visual analogue scale (VAS) scoring system.Results Nineteen patients were all followed up for 24 to 48 months,with an average of 30.42±5.11 months.Fourteen cases (73.7％,14/19) with talus end avulsion were treated by double suture anchor in the talus,with continuous locking suture of the avulsed end.Four cases (21.1％,4/19) with middle part rupture were treated by double suture anchor in the talus,with the sutures crossing three bone tunnels at the medial malleolus.One case (5.3％,1/19) with medial malleolus end avulsion was treated by single suture anchor at the medial malleolus,with continuous locking suture of the avulsed end.At the last follow-up,the AOFAS score was ranged from 70 points to 96 points,with an average of 90.53 points,and excellent in 16 cases,good in 2 cases,fair in 1 case,excellent and good rate was 94.7％.The VAS score was ranged from 0 to 2 points,with an average of 0.42 point.No wide medical clear space was detected.But traumatic arthritis was happened in 2 patients.Conclusion The targeted suture anchor repair technique according to the rupture site was a save technique in treating deltoid ligament rupture,which is conducive to early postoperative functional exercise,with excellent short-term clinical outcomes and few complications.

Objective:To establish the basic procedures of the application of optical surface monitoring system (OSMS) in the deep inspiration breath hold (DIBH) radiotherapy for patients with left sided breast cancer and compare the performance of OSMS and cone-beam CT (CBCT) in the determination of the set-up errors of DIBH radiotherapy for patients with left sided breast cancer.Methods:Twenty patients with left sided breast cancer received DIBH radiotherapy. Through the registration of CBCT images with the planning CT images, and the registration of OSMS radiography images with the outer contour of the body surface, translational set-up errors and rotational errors were determined along the lateral-medial ( Rx), superior-inferior ( Ry) and anterior-posterior ( Rz) directions. Pearson correlation analysis was performed to evaluate the correlation of the set-up errors determined by two methods, and Bland- Altman plot analysis was used to assess the coincidence of these two methods. Results:Two methods were positively correlated. The Rz volume was 0.84, 0.74 and 0.84 in the x, y and z directions, and 0.65, 0.41 and 0.54 in the Rx, Ry and Rz directions, respectively (all P<0.01). The 95% CI of agreement were within preset 5 mm tolerance (-0.37-0.42cm, -0.39-0.41cm, -0.29-0.49cm ) in x, y and z directions for two methods. The 95% CI of agreement were within preset 3 ° tolerance -2.9°-1.4°, -2.6°-1.4°, -2.4°-2.5°in Rx, Ry and Rz directions for two methods. The system errors of 20 patients with left sided breast cancer receiving DIBH radiotherapy were <0.18cm and the random errors were <0.24cm. Conclusions:OSMS is equivalent to CBCT in the determination and stimulation of set-up errors for patients with left sided breast cancer receiving DIBH radiotherapy. The combination of CBCT and OSMS is a safe and reliable method.

Inhibition of human epidermal growth factor receptor 2 mediated cell signaling pathway is an important therapeutic strategy for HER2-positive cancers. Although monoclonal antibodies are currently used as marketed drugs, their large molecular weight, high cost of production and susceptibility to proteolysis could be a hurdle for long-term application. In this study, we reported a strategy for the development of artificial antibody based on

Targeting immune checkpoints such as programmed cell death protein 1 (PD-1) and programmed death ligand-1 (PD-L1) have been approved for treating melanoma, gastric cancer (GC) and bladder cancer with clinical benefit. Nevertheless, many patients failed to respond to anti-PD-1/PD-L1 treatment, so it is necessary to seek an alternative strategy for traditional PD-1/PD-L1 targeting immunotherapy. Here with the data from The Cancer Genome Atlas (TCGA) and our in-house tissue library, PD-L1 expression was found to be positively correlated with the expression of ubiquitin-specific processing protease 7 (USP7) in GC. Furthermore, USP7 directly interacted with PD-L1 in order to stabilize it, while abrogation of USP7 attenuated PD-L1/PD-1 interaction and sensitized cancer cells to T cell killing