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BACKGROUND: Various artifacts are found to be appeared in the nuclear magnetic resonance; the frequently appearing ones are the motion artifacts, plait artifacts, metallic artifacts, partial volume effect artifacts, chemical shift artifacts, phase artifacts, zipper artifacts and so on. However, there is still has no report on the controlling and revising method of the zipper artifacts which is produced in the spin-echo sequence imaging process. OBJECTIVE: Based on the discussion of the mechanism of the production of zipper artifact in the spin-echo sequence imaging process, a new impulse sequence is worked out to avoid the zipper artifact. METHODS: Standard SE sequence was complied to obtain the standard image, and compiling the artifact sequence to obtain the linear disturbance image and zipper artifact image, compiling the modified sequence to obtain the modified zipper artifact image. RESULTS AND CONCLUSION: Usually, the linear disturbance image could obtained in the instantaneous gradient of 5 degree with the echo sequence of 120 degree, and the zipper artifact will be obtained in the instantaneous gradient of 90 degree with the echo sequence of 120 degree. Modified sequence instantaneous gradient of 90 degree with the echo sequence of 120 degree can completely eliminate zipper artifact. The interesting result obtained in this paper is that the zipper artifact can be totally avoided with this new impulse sequence.
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Objective to investigate the therapeutic efficacy of multiple-point injection with absolute alcohol and pinyangmycin under digital fluoroscopic guidance for superficial venous malformations. Methods By using a disposal venous transfusion needle the superficial venous malformation was punctured and then contrast media lohexol was injected in to visualize the tumor body,which was followed by the injection of ethanol and pinyangmycin when the needle was confirmed in the correct position. The procedure was successfully performed in 31 patients. The clinical results were observed and analyzed. Results After one treatment complete cure was achieved in 21 cases and marked effect was obtained in 8 cases,with a total effectiveness of 93.5%. Conclusion Multiple-point injection with ethanol and pinyangmycin under digital fluoroscopic guidance is an effective and safe technique for the treatment of superficial venous malformations,especially for the lesions that are deeply located and ill-defined.
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BACKGROUD: According to the record of Compendium of Herbology of herbs epimedium, Berberidaceae barrenwort genus, herbs epimedium has the effects of supplementing essence qi, consolidating bones and tendons, tonifying bruise of loin and strengthening cardiac ability, etc. In recent years, its clinicalapplications and pharmacological effects have been reported more frequently.OBJECTIVE: To investigate the effects of herba epimedium extract on spontaneous activity and sleep function of mice under the intervention of suprathreshold and subthreshold dose of pentobarbital sodium with the method of jiggle-cage transducer.SETTING: Department of Mathematics and Physics, Laboratory of Analysis, Department of Pharmacology, Gannan Medical College.MATERIALS: A total of 110 healthy adult Kunming male mice of clean grade, with a body mass between 18 g and 22 g.METHODS: The experiment was conducted in Laboratory of Scientific Research Institute of Gannan Medical College from August to September 2004. ① The mice (n=30) were injected intraperitoneally with 1 000 g/L herbs epimediu extract(0.01 mL/g) and put into hanging cage 15 minutes later, after a 3-minute stabilization period, waveforms of spontaneous activity within 15 s after the administration of drug were recorded. ②The mice (n=40) were intraperitoneally injected with 1000 g/L herba epimediu extract(0.01 mL/g), 15 minutes later, injected intraperitone ally with 0.02 mL/g suprathreshold dose of pentobarbital sodium (2.5 g/L), and then observe the disappearance time of righting reflex of the mouse. ③ The mice (n=40) were injected intraperitoneally with 1 000 g/L herba epimediu extract(0.01 mL/g), 15 minutes later,intraperitoneally injected with 0.01mL/g subthreshold dose of pentobarbital sodium (0.25%),and then observe the disappearance time of righting reflex of the mouse.MAIN OUTCOME MEASURES: Frequency of spontaneous activity of the mice; sleeping time of the mouse with suprathreshold and subthreshold dose of pentobarbital sodium.RESULTS: All the 110 mice entered result analysis. ① Herba epimedium extract (0.1 mL/10 g) could significantly inhibit the spontaneous activity of the mice, and the frequencies of large waves and moderate waves decreased obviously (7.4±6.5, 47.1±18.7; t=3.265, P ＜ 0.01). ② Herbs epimedium extract (0.01mL/10g) could shorten the time for falling asleep and prolong the sleeping time of the mouse with suprathreshold dose of pentobarbital sodium, and there was significant difference as compared with the control group [(3.9±2.8), (219.7±87.2); (5.8±2.9), (113.0±77.4) minutes; t=2.452, 2.501, P ＜ 0.05]. ③ Herba epimedium extract (0.01 mL/10 g)could significantly prolong the time for falling asleep and the sleeping time of the mouse with subthreshold dose of pentobarbital sodium, and there was significant difference as compared with the control group [(6.6±5.2),(60.3±71.7); 0, 0 minute; t=3.275, P ＜ 0.01]. Herba epimedium extract and pentobarbital sodium had synergistic effect of central inhibition.CONCLUSION: Herba epimedium extract has the effect of significant central inhibition, which could inhibit the spontaneous activity of mice ,remarkably shorten the time for falling asleep,and obviously prolong the sleeping time of the mouse with suprathreshold dose of pentobarbital sodium, prolong the time for falling asleep of the mouse with subthreshold dose of pentobarbital sodium and increase the amount of animals falling asleep.
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Objective To develop and perfect hospital PACS in higher application level so that the imaging work can serve the diagnosis and therapy more efficiently.Methods According to the basic PACS theories and Criterion DICOM,the image acquisition and transmission were classified in study the optimal implementation plan was put forward through the effects comparison in practice and the experiences in PACS application and maintenance were explored.Results With common problems in image acquisition and transmission solved,PACS in hospital run smoothly.Conclusion The effective transmission of PACS can be attained by scientific hardware design and software tactic.
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This paper introduces daily management systems of medical equipment and some valid methods in our hospital.Such aspects are discussed as the equipment management organism,supply management,using management,maintenance management,etc.
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This paper presents the knowledge on fixing the heartbeat machine to the patients in such aspects as fixing,testing,using,notice in fixing,etc.
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Objective To sum up transplantation of forearm skin flap to repair the whole defect of the lip.Method Forearm free skin flap was used to repair the whole defect of the lip in 5 cases. Results The treatment was completed in one stage and the results were satisfactory in 5 cases.And the reconstructed lip showed good shape.Conclusions Forearm skin flap has many strong points:the skin flap has big area and wide blood vessel diameter.It is successed easy to be identical,operation can be completed once, and don't suffered harm to face or neighbour supply area.The skin flap has safe grain,more thinner, good springy and similar colour.It plays an important role in the repairs of the whole defect of the lip with nearby skin soft tissue defect.