MOOC is a new online teaching model. Learners complete the course of study through on-line autonomous learning, communication with others, receiving system assessment and evaluation. In medi-cal imaging teaching, the combination of MOOC and traditional classroom teaching is a new way of med-ical imaging teaching reform. It will be beneficial to integration and making full use of high quality teaching resources, which plays an important role in the discipline development and the teaching quality improve-ment.

Purpose:To evaluate the thrombolytic effect of transcatheter intra-arterial infusion of urokinase injectio salviae miltiorrhizae and heparine.Materials and methods:A 5F catheter was delivered to the thrombotic site via femoral artery,then infused urokinase.Injectio salviae mihionrrhizae via catheter.During and after the procedure heparin was given for antico- agulation.Finally to evaluate the effect by femoral arteriograms.Results:Blood circulation of 10 eases were inproved with complete pateney.One case wasn't very fluent and the last one remained obstructed.Total effective rate was 92%.Conclusion:Transcatheter Intraarterial thrombolysis by combing urokinase,injeetio salviae miltiorrhizae and heparin was a effective and safe theraputic method.

Objective To explore the indications, intraoperative problems and management of its complications of the microendoscopic discectomy (MED) in the treatment of lumbar intervertebral disc herni-ation through posterior approach. Methods 242 cases of lumbar disc herniation treated by MED were re-viewed retrospectively from March 2000 to March 2002. Of the 242 cases, there were 171 males and 71 fe-males aged from 19 to 71 years with an average of 34 years. Among them, the lesions were located at single level in 193, double levels in 46, and three levels in three. All of 242 patients were examined with CT, 48 of which were performed MR. Results 205 herniated discs of the single level were removed, 36 of the double levels, and one of the three levels. It was average 2.2 days for the patients to get off bed ranging from 24 hours to 6 days. Postoperative hospitalization was from 3 to 12 days with an average of 5.2 days. Among the intraoperative complications, dural tear happened in four, nerve root injury in two, and mistakes of localiza-tion in one. While in postoperative complications, there was discitis in one which happened at three weeks postoperatively, and was cured with antibiotics and ambulation for five months. All incision healed in one stage, except one suffered from superficial infection and healed by dress changing. All cases were followed up for 2 to 15 months with an average of 6 months. The average period for the patients retuning to daily life was 3.6 weeks, and 52.4% of the patients restored to previous work. According to Macnab's evaluation sys-tem for clinical outcomes, the results showed excellent in 183, good in 44, fair in 13 and poor in two, so the rate of excellent and good was 94%. However, there were two cases converted to open operation because of compressive neurological dysfunction. Conclusion Appropriate control of indications and skillful surgical technique are the key points to decrease the complication, and to improve the curative effect.

Objective To analyze the imaging and histopathologic features of extra-plural solitary fibrous tumor (SFT) and to improve the diagnose diagnostic ability.Methods The images and pathologic features of 32 SFT cases confirmed by pathology were retrospectively reviewed.Results Of 32 SFT cases, there were 5 cases in the head, 3 cases in the orbit, 1 case in the nasal sinuses, 1 case in the bronchus, 2 cases in the stomach,1 case in the pancreas, 3 cases in the kidney, 3 cases in the retroperitoneum, 4 cases in the pelvic cavity, 6 cases in the soft tissues, 3 cases near the vertebra.6 cases were malignant,8 cases were borderline,18 cases were benign.The tumors located in abdominal and pelvic tumors were larger,the average diameter of the tumors was 13.6 cm.The volumes of the other tumors were smaller, the average diameter was 4.2 cm.The majority of the tumors showed clear boundary, smooth edge or lobulated soft tissue mass, partial necrosis, rare cystic degeneration and calcification.MR images showed hypo to isointensity on T1WI and hyper to isointensity on T2WI.After enhanced enhancement, multiple small circuitous vessels could be found in or around the mass.The tumor showed slightly enhanced in the arterial phase and moderately to obviously heterogeneously enhancement in the venous phase.In addition, part of the tumors can could be seen positive-negative signal changes.The positive expression rate of immunohistochemical indexes were: CD34 100%, CD99 68.8%, Bcl-2 62.5%, Vimentin 46.9%, Ki-67>5% 43.8% respectively.

Ninety rats were divided into 8 groups. Group 1-5 were fed vitamin A free ration and each group was divided into 2 subgroups at the beginning and 12, 23, 36, 43, days after the experiment respectively. Group 6-8 were fed the ration containing 66, 132, and 198?g vitamin A per 100g diet respectively fer 30 days, and each group was also divided into 2 subgroups. The results showed that RBPR% was better than the serum vitamin A content in evaluating vitamin A nutritional status. It was suggested that the vitamin A nutritional status could be graded as follows: deficient(abore 70%)) mar-ginal(60-70%),normal (20-60%), and sufficient (under 20%)by RBPR%.

An improved microfluorimetric method for determination of serum vitamin A was presented. In this method, the excitation wavelength 345nm and emission maximum 480nm were selected, and cyclohexane as solvent for extraction of saponified vitamin A in the serum samples to be tested was used. The sensitivity was sufficient for measurement of vitamin A content in 20*l serum taken from normal fasting blood without elimination of interference. The recovery averaged 99.0% (93.0-105.5).When this method was applied to laboratory study or field work, practically, the results showed that the values of vitamin A obtained seemed to correlate with its nutritional status of experimental animals or subjects investigated. The procedure was simple, reproducible and easily acceptable, espicially in the field work.

35 rats were divided into 5 groups. Group 1-3 were fed rations containing 20, 12 and 6% caseien respectively, group 4 containing 12% mixed protein of soybean and gluten. The food of group 5 was the same as that of group 1 but the amount was only half of that of group 1. Every animal was given 8?g vitamin A by stomach tube daily for 3 weeks and then 25?g for 2 weeks. Afterward serum vitamin A values were determined in all animals, then 132?g vitamin A was administrated by stomach tube. After 3.5 hours, the vitamin A values in serum and liver were determind. The results showed that in group 3 and 5 serum vitamin A contents decreased and the liver values rose. It was suggested that the release of vitamin A from liver had been interfered by semistarvation or low protein intake. There is no difference between group 2 and 4.

Based on the body height and weight of the Chinese young men, 975 from the north and 921 from the south of China, actually measured, a calculating formula for the ideal body weight of young men both of north and south listed blow was established. The Northener's ideal body weight (kg) = [height (cm) - 150] ? 0.6 +50; the Southener's ideal body weight(kg) = [height (cm.) - 150] ? 0.6 +48. The formula later checked by another data of body height and weight of 783 young men from north and 883 from south has been proved to be reliable. It also showed that the ideal body weight of 1464 young men from north and 2264 from south calculated according to the formula seemed to be more reasonable than the another's formula used previously.

Using the Medical Imaging Experimental Teaching Demonstration Center of Nanjing Medical University and related web site as a platform, we have established a case library and online learning system which fused medical imaging, pathology and anatomy images according to the human organ system. The system has achieved a“medical imaging”teaching real-time, diversified, systematic and clinical simulation technology. Medical students can perform image processing, simulate writing reports and discuss online using this system. Teachers can use the system to carry out teaching reform-problem-based learning (PBL), and the integration of teaching with horgan systems and case based curriculum.

Objective To analyze the correlations between the CT features and pathological classifications of gastroentric neuroendocrineneoplasm(GE-NEN) and to evaluate the association between prognostic value and CT features.Methods 45 cases pathologically and immunohistochemically proved GE-NEN were studied retrospectively.The correlation between the CT features (tumor's volume,shape,enhancement patterns and TNM stage) and pathological classifications was analyzed.Meanwhile,the association between the CT features and patients' overall survival was evaluated by Kaplan Meier method using Log-rank test and multivariate analysis in Cox proportional hazard model.Results The CT features were proved to be associated statistically with pathological classifications including the tumor's volume,shape,with or without areas of cystic change,necrosis or ulceration,T stage and lymphadenopathy (P ＜ 0.05).On the other side,the patients' overall survivals were associated with age,pathological classifications,volume of tumors,with or without areas of cystic change,necrosis or ulceration and TNM stage.Age,areas of cystic change,necrosis or ulceration and metastases were the independent prognostic factors.Conclusion Contrast-enhanced CT can be useful in the classification of GE-NEN and predicting the patient's survival.