[en] Objective: To evaluate the clinical efficacy of selective salpingography (SSG) and fallopian tube recanalization (FTR) in diagnosing and treating fallopian tubal infertility. Methods: SSG was performed in 459 patients and a total of 895 fallopian tubes were proved to be completely or incompletely occluded. Under fluoroscopic guidance, a catheter was managed to be placed in the tubal ostium, then a catheter and guide wire system was used to clear the proximal tube. The cumulative pregnancy rate within eighteen months after the treatment was calculated, and the postoperative tubal patency degree was compared with the preoperative one. Results: After FTR complete patency was achieved in 572 tubes(63.9%). For complete occluded tubes the postoperative patent rate was 80.3%(53/66), while it was 96.7% (802/829) for incomplete occluded tubes. During the follow-up period of 18 months, the pregnancy was confirmed in 43.9% patients(93/212), among which ectopic pregnancy was seen in 2.1% patients (2/93). The median procedure-conception interval was 8.2 months. The pregnancy rate was 51.3% (58/113) in patients with basically patent bilateral fallopian tubes, and it was 35.4% (35/99) in patients with incomplete patent fallopian tubes. Conclusion: The results clearly indicate that SSG together with FTR is a safe and effective method for the treatment of female infertility caused by proximal blockage or incomplete occlusion of the fallopian tubes. (authors)

[en] The state diagram of magnetostatic coupling phase-locked spin torque oscillator (STO) with perpendicular reference layer and planar field generation layer (FGL) is studied by the macrospin model and the micromagnetic model. The state diagrams of current densities are calculated under various external fields. The simulation shows that there are two phase-lock current density regions. In the phase-locked STOs in low current region I, the spin configuration of FGL is uniform; in high current region II, the spin configuration of FGL is highly nonuniform. In addition, the results with different STOs separation L_s are compared, and the coupling between two STOs is largely decreased when L_s is increased from 40 nm to 60 nm

[en] Background and purpose: To explore the value of CT spinal angiography with 64-detector row spiral CT in diagnosing spinal vascular malformations. Methods: Seventeen patients with initial MR and clinical findings suggestive of spinal vascular diseases underwent CT spinal angiography. Among these, 14 patients took DSA examination within 1 week after CT scan, 7 patients underwent surgical treatment, and 6 patients underwent vascular intervention embolotheraphy. CT protocol: TOSHIBA Aquilion 64 Slice CT scanner, 0.5 mm thickness, 0.5 s/r, 120 kV and 350 mA, positioned at the aortic arch level, and applied with 'sure start' technique with CT threshold of 180 Hu. Contrast agent Iohexol (370 mg I/ml) was injected at 6 ml/s velocity with total volume of 80 ml. The post-processing procedures included MPR, CPR, MIP, VR, etc. Among the 17 patients, four patients underwent fast dynamic contrast-enhanced 3D MR angiography imaging. CT spinal angiography and three-dimensional contrast-enhanced MR angiography (3D CE-MRA) images were compared and evaluated with DSA and operation results based on disease type, lesion range, feeding arteries, fistulas, draining veins of vascular malformation by three experienced neuroradiologists independently, using double blind method. The data were analyzed using SPSS analytic software with χ²-test. We compared the results with DSA and operation results. Results: The statistical analysis of the diagnostic results by the three experienced neuroradiologists had no statistical difference (P > 0.05). All of the 17 patients showed clearly the abnormality of spinal cord vessels and the range of lesions by CT spinal angiography. Among them, one patient was diagnosed as arteriovenous fistulas (AVF) by MRI and CT spinal angiography, which was verified by surgical operation. DSA of the same patient, however, did not visualize the lesion. One case was diagnosed as AVM complicated with AVF by DSA, but CT spinal angiography could only show AVM not AVF. The type differentiations of all the other 16 patients were consistent with DSA results. For 13 cases with positive CT spinal angiography results, DSA displayed 20 feeding vessels, among which 16 vessels were displayed correctly by CT spinal angiography, four could not be visualized, and two turned out to be false-positive. Fistulas were not displayed in six cases by CT spinal angiography. Draining veins were displayed clearly in all cases, which agreed with DSA results. Four cases who took CE-MRA obtained the same type diagnosis as that from CT spinal angiography. Feeding arteries were not displayed in CE-MRA of one case, but could be clearly visualized in other three cases, and the results agreed with CTA and DSA results. Fistulas could be seen in two cases. Draining veins and the disease range could be displayed distinctly by 3D CE-MRA. Conclusion: CT spinal angiography is quite valuable for diagnosing vascular malformation of spinal cord. It can be a screening exam before DSA, and has a guiding effect on DSA, reducing the amount of time required for DSA.