In this paper,such information of argon-fluoride excimer laser is introduced as its principle,capacity,features and application to corneal refractive surgery.Its treatment effects and developing trend are also mentioned.

In this paper, the constitution and operation principle of an automatic ventilation system for excimer laser therapeutic instrument are introduced. With high accuracy, stability and reliability, the system benefits the performance and service life of the instrument.

Objective To investigate the value of interventional therapy for nephrorrhagia after mini-invasive percutaneous nephrolithotomy(MPCNL).Methods From February 2007 to December 2008,16 cases with nephrorrhagia after MPCNL underwent interventional therapy,of them,14 cases treated with super-selective embolization,one case treated by kindey arterial embolization and one case with renal subcapsular bleeding treated by reptilase intra-arterial infusion.Results In 16 cases,15 cases were successfully treated by embolization.Conclusion Interventional therapy is the first choice method for treating nephrorrhagia after MPCNL.

Objective To explore the role in the localization of vascular puncture points with dynamic contrast-enhanced magnetic resonance angiography (DCE-MRA) before transjugular intrahepatic portosystemic shunt (TIPS). Methods MRA images of 46 patients with portal hypertension were measured. The patients were then punctured according to the measurement Results The supero-inferior distant from the puncture point of hepatic vein to plane of right branch of portal vein (AA') was (22.63±10.21)mm, the anteroposterior distant from the puncture point of hepatic vein to plane of right branch of portal (A'A'') was (13.93±1.07)mm, the angle of sag was (31.64±9.23)°. The distant from puncture point of hepatic vein (AS) and right branch (BS) were (23.51±2.12)mm and (38.51±5.36)mm. The angle of cor was (33.57±8.93)°. Forty-five patients were successful punctured, and the time of puncture decreased. Conclusion The location of portal vein puncture point during TIPS are changeable, therefore individualized location of positioning is needed. DCE-MRA is a valuable non-invasive method of localization, playing an important role in localization of vascular puncture points of TIPS.

With the increasingly strengthening of economic globalization and higher education internationalization,medical imageology as an important intersecting science in life sciences has more and more international communion and cooperation.In China many hospitals and medical colleges require large quantities of medical imageology professionals,and it is very necessary and important to develop the bilingual education in medical imageology,though a series of problems appear in the process.

The developing situation of "big image" makes the medical imaging become an increasingly huge and complicated system.It offers higher request to the medical imaging teaching.The internship of last term is always influenced by attending the graduate student's entrance examination and looking for job,the effect of teaching can't be assured,and it especially important to do well in field trip,thus it can reduce or avoid the phenomenon of "practice after graduate".

ObjectiveTo observe the effect of Nd∶YAG laser combined with enamel cement on dentine hypersensitiveness (DH).Methods120 DH cases (totally 182 teeth) were randomly divided into two groups. The experiment group (92 teeth) was treated with Nd∶YAG laser and enamel cement. The control group (90 teeth) was only treated with Nd∶YAG laser.ResultsEffective rates of the experiment group at the moment of treatment, 3 months and 6 months after treatment were 97.8%, 96.7% and 90.2 % respectively, and that of the control group were 95.6%, 91.1% and 84.4%. There was a significant difference between two groups (P<0.05).ConclusionNd∶YAG laser combined with enamel cement has an obvious effect on DH.

Objective To observe the characteristics of different level of normal abdominal aorta’s time-flow,time-velocity curve and to investigate the hemodynamic factors in role of the occurrence and development of abdominal aorta’s disease.Methods PC-MRI scanning was performed on 60 normal volunteers T12/L1-L4/5 disc at the level of abdominal aorta,time-flow and time-veloci-ty curve were generated respectively.The characteristics of blood flow curves at different levels of abdominal aorta were observed. Results The time-flow,time-velocity curve of the normal abdominal aorta in different levels have 2nd phase (no diastolic reflux) and 3rd phase (diastolic reflux).Conclusion The characteristics of blood flow curves of different levels of abdominal aorta are dif-ferent.

Objective To study the clinical efficacy of the combination of sephedex and docetaxel used in transcatheter arterial chemoembolization (TACE) for clinical treatment of primary liver cancer.Methods 120 patients with primary liver cancer in our hospital were divided into the experimental group and the control group randomly and equally, the 60 cases in experimental group were treated with sephedex suspensoid (Sephedex, G-50, 300-500 μm) and docetaxel-iodized oil, while other 60 cases in control group were treated with docetaxel-iodized oil suspension liquid.Results The success rate of surgical intubation in the two groups was 100%.After an average follow-up of 12 months, the postoperative tumor diameter of the experimental group was reduced by (4.4±1.4) cm, while that of the control group was (1.8±1.0) cm;The overall response rate was 70% in the experimental group in contrast to 30% in the control group;the alpha fetal protein (AFP) value was decreased by (33.2±15.2) μg/L in the experimental group and (10.4±9.8) μg/L in the control group.Conclusion The combination of sephedex, docetaxel suspensoid and iodized oil shows great potential in TACE treatment of primary liver cancer, from which the treatment effect can be improved significantly.

Objective:To investigate the correlation between peripheral blood renal function indexes and brain frailty imaging score in patients with mild ischemic stroke or transient ischemic attack (TIA).Methods:Patients with mild ischemic stroke or transient ischemic attack (TIA) admitted to the Department of Neurology, the Second Affiliated Hospital of Soochow University from March 2018 to August 2019 were enrolled retrospectively. General clinical data and peripheral blood renal function indexes, including urea, uric acid and estimated glomerular filtration rate (eGFR), were collected. eGFR <60 ml/(min·1.73 m 2) was used to reflect chronic kidney disease. According to the findings of MRI examination, the imaging score of cerebral frailty was performed. When there were white matter lesions, brain atrophy and lacunar infarction/lacuna, 1 point was given, and the total score was 3. Ordinal multi-class logistic regression analysis was used to evaluate the relationship between renal function indexes and brain frailty imaging score in patients with mild ischemic stroke or TIA. Binary logistic regression analysis was used to evaluate the relationship between renal function indexes and brain frailty imaging score >1. Results:A total of 204 patients with mild ischemic stroke or TIA were enrolled during the study. Their average age was 64.82 years old and 78 (38.2%) were females. There were 28 cases (13.73%), 70 cases (34.31%), 63 cases (30.88%) and 43 cases (21.08%) with brain frailty imaging scores of 0, 1, 2, and 3, respectively. One hundred and six patients (51.96%) were in the brain frailty imaging score >1 group and 98 (48.04%) were in the ≤1 group. Univariate analysis showed that there were significant differences in age, diabetes mellitus, eGFR, eGFR classification, homocysteine, intracranial vascular stenosis, stroke etiology classification and vascular distribution between the group with brain frailty imaging score >1 and those with brain frailty imaging score ≤1 (all P<0.05). Ordinal multi-class logistic regression analysis showed that urea (odds ratio [ OR] 0.67, 95% confidence interval [ CI] 0.51-0.89, P=0.005) and eGFR ( OR 0.98, 95% CI 0.96-0.99; P=0.004) were significantly and independently correlated with brain frailty imaging score. Binary logistic regression analysis showed that eGFR was significantly and independently correlated with brain frailty imaging score >1 ( OR 0.98, 95% CI 0.96-1.00; P=0.016). However, urea, uric acid and eGFR classification were not independently correlated with brain frailty imaging score or brain frailty imaging score >1. Conclusion:Blood urea and eGFR are correlated with the brain frailty imaging score in patients with mild ischemic stroke or TIA.