[ABSTRACT]OBJECTIVETo study clinical features and imaging manifestations of facial nerve hemangioma. METHODSClinical data of 5 cases with facial nerve hemangioma, who were diagnosed and treated in facial lab of Beijing Shijitan hospital between January 2006 and December 2011, were collected. There were 2 male and 3 female. The age ranged from 29-44 years. Among the 5 cases with facial nerve hemangioma, both HRCT of temporal bone and facial nerve enhancement MRI were performed on 4 cases, and one case underwent facial nerve enhancement MRI examination only.RESULTSAll the 5 cases firstly presented with sudden unilateral facial palsy. Facial palsy affected the left and right side in 4 cases and 1 case, respectively. Geniculate ganglion was affected in all cases. Local bony canal expansion at geniculate ganglion, labyrinthine segment and horizontal segment was the main manifestation of facial nerve hemangioma on HRCT, and the surrounding bone was incontinuous and less regular. The typical appearance was point-shape or pin-shape, similar to honeycomb structure. On MRI, soft tissue node image around geniculate ganglion accompanied by thickness of the adjacent facial nerve was the chief appearance. It showed mixed T1, uneven and slightly longer T2 signal with less clear border on horizontal scanning, and abnormal enhancement was exhibited after enhancement scanning.CONCLUSIONDetailed history together with HRCT of temporal bone and multi-planar reconstruction MPR as well as facial nerve enhancement MRI were useful for preoperative diagnosis of facial nerve hemangioma. The tumor should be removed with surgical approach was based on hearing conditions, tumor scale and the affected sites.in order to preserve integrity of facial nerve if possible.

Objective To investigate the effects of Helium-oxygen mechanical ventilation on respiratory mechanics and oxygenation in ALI animal models.Methods To investigate the changes of respiratory mechanics and oxygenated indexs in acute lung injury rat models caused by sepsis at different PEEP by comparing air-oxygen mixture mechanical ventilation with helium-oxygen mixture mechanical ventilation.Results 1.Helium-oxygen mechanical ventilation could not improve respiratory mechanical indexs in ALI animal models(airway peak pressure、mean airway pressure、platform pressure、dynamic compliance、airway resistance、flow rate of peak value).On the contrary,in the condition of high level of PEEP,some indexs became worse,such as depress of dynamic compliance(P

With the rapid development of society and the increasing improvement of living standard,people shows increasing demand for high quality of medical care so that more and more advanced medical instruments are applied to disease prevention,diagnosis and treatment.Thanks to the development of the professional medical technology,a new branch of medicine-clinical engineering has emerged.The history,current situation and future development of clinical engineering are mainly expounded.

With the rapid development of Picture Achieving and Communication System(PACS), the interpretation of medical images has been changing rapidly from a procedure based on films and light boxes to one based on computers and medical displays. The function parameters of Soft-Copy Reading carriers——medical grayscale display play an important part in radiodiagnosis because they can greatly influence the quality of medical image. It is very easy for quantitative assessment of this influence by using ROC curve theory, and it can direct hospital to select suitable medical display.

Objective To evaluate the influence of the resolution of medical grayscale LCD over the detective efficiency of pulmonary nodule.Methods By reviewing PACS, 93 on-line chest DR images were collected.These radiographs included 23 normal images that had no nodule confirmed by CT, 32 doubtful images that also had no nodule confirmed by CT,and 38 positive images that had nodules confirmed by CT.These nodules didn't show obvious calcification and their diameters were from 0.30 to 1.90 cm. Nine patients had multi-nodules.Three residents or postgraduates, three attending physicians, and three associate professors or professors interpreted the 93 chest images by using three types of displays: Barco Z-2261, Barco Z-3620 and Barco Z-5620.All observers evaluated their confidence of the presence of pulmonary nodule with five-point level rating scale : ( 1 ) definitely positive, ( 2 ) probably positive, ( 3 ) uncertain, (4) probably negative, (5)definitely negative.SPSS 11.5 software was used to analyze the results ,including to draw the ROC curves and to perform Z test.Results The areas under the ROC curves of 2 M display, 3 M display and 5 M display were 0.774,0.784,0.816 for experienced radiologists; for instructors were 0.754,0.764,0.768 ;for teaching assistants were 0.695,0.754,0.774.However, for the detection of pulmonary nodules,there was no significant difference between observers with different ranks using the same modality of display,and no significant difference was found between the different modalities of displays used by observers with the same rank.Conclusion It's equivalent for detection performance with 2,3 and 5 M medical grayscale LCD display in detecting pulmonary nodule; Experienced radiologists can get more information using 5 M display;By reasonably matching displays, we could improve the cost-efficacy.

Objective To investigate the effect of Helium-oxygen mechanical ventilation on histomorphology in acute lung injury(ALI)animal models.Methods To investigate the changes of histomorphology in ALI rat models caused by sepsis by comparing air-oxygen mixture mechanical ventilation with helium-oxygen mixture mechanical ventilation.Results Helium-oxygen mechanical ventilation has no influence on the change of lung histomorphology.Conclusion Helium-oxygen mixture mechanical ventilation could not improve lung histomorphology.Helium-oxygen mixture mechanical ventilation has no protective effect on ALI animal models.

Objective: Evaluate the influence of monochrome LCDs with different resolutions for the quality of detail imaging and detection performance of lesions. Methods: 93 DR chest images were selected from PACS on-line, including 38 positive cases, 32 suspected cases and 23 normal cases. The positive cases were divided into two groups A and B according the diameter of pulmonary nodules. Three of high-, mid-and low-experienced radiologists interpreted the 93 images on three types of displays independently. Each observer marked their confidence of the presence of pulmonary nodule with five-point rating scale : (1)definitely absent, (2)probably absent, (3)possibly present, (4)probably present and (5)definitely present, and the visual quality of lung markings with three-point rating scale:(1) excellent, (2)free, (3) inferior. Software SPSS 13.0 was used to analyze the results. Results: For the detection performance of lesion, while detecting nodules of Group A, the areas under ROC curves were 0.643、0.686、0.739 on 2MP、3MP and 3MP display for high-experienced radiologist. Those were 0.636、0.682、0.717 for mid-experienced radiologist and 0.623、0.656、0.721 for low-experienced radiologist; while detecting nodules of Group B, those were 0.813、0.832、0.846 for high-experienced d radiologist, 0.773、0.824、0.838 for mid-experienced radiologist and 0.763、 0.7.73、0.833 for low-experienced radiologist. There were no significant differences among detection performance ofradiodiagnostic systems. For the quality of detail imaging, while interpreting the visualization of lung markings, the difference between high-and mid-experienced radiologist or between high-and low-experienced radiologist on 5MP display was conspicuous (P<0.05). But the differences of other comparisons did not reach the significant level. Conclusions: For the detection performance ofpulmouary nodules, it is comparable among different radiodiagnostic systems; for the visualization of lung markings, high-experienced radiologist could get more information on 5MP display.

Objective:To summarize and analyze the disease characteristics of the patients in Chinese Level-II Hospital for UN Peacekeepers in Liberia,for offering some references to the pre-mission training of the successive contingents as well as the improvement of medical support to the peacekeeping mission.Methods:A statistical analysis was made of the case history of all the outpatients and inpatients received in Chinese Level-Ⅱ Hospital for UN Peacekeepers in Liberia from May 2004 to December 2005. Results:Out of the total of 7107 outpatients,2539(35.7%) were medical cases,1205(17.0%) surgical,1136(16.0%) dental,787(11.1%) dermatological and 763(10.7%) contagious cases.Malaria was the main type of contagious disease,which accounted for 86.1% of all the contagious cases.There were 39 cases of AIDS/HIV(acquired immunodeficiency syndrome / human immunodeficiency virus).Of the 453 inpatients,233(51.4%) were contagious and 166(36.7%) medical cases,and 185(40.8%) of the total number suffered from malaria.The average hospital stay was 5.2 days.Conclusion:Adequate drugs and equipments should be prepared for both common and special diseases in the peacekeeping mission area.During the pre-mission training at home,special emphasis should be laid on the prevention and treatment of common diseases and frequently occurring diseases,particularly on the diagnosis of and protection against AIDS.

Perfofinance of the radio-diagnostic system can be evaluated quantitatively by the analysis method of the ROC curve.Areas under the ROC curves represent the diagnostic perfogrmance efficiency.A comparison of the perforrmance variance of the diagnostic system incurred by different diagnosticians,will find the diagnostic competence of individual diagnosticians.This can help hospital management in deploying personnel in the department of radiology reasonably.

Objective Evaluate the influence of medical monochrome liquid crystal display (LCD) with different resolutions on the detection of pulmonary nodules.Methods Ninety-three direct digital radiography (DR) chest images were selected on-line from picture archiving and communication system (PACS),including 38 positive,32 suspected and 23 normal cases.All of the images were confirmed by CT.These positive images were divided into group A and B according to the diameter of nodules.Three experienced radiologists blindly read the 93 images using three types of displays with different resolutions.Regarding the presence of nodule,five-point confidence system was used:definitely absent,probably absent,indefinite,probably present and definitely present.All observers marked their confidence levels of each image according to the presence of pulmonary nodule on different displays.Software SPSS 13.0 was employed for statistical analysis.Results In the group-A cases,the areas under ROC curves were 0.643,0.686 and 0.739,and in the group-B cases,those were 0.813,0.832 and 0.846 respectively.There was no difference in the detection efficacy among different radiodiagnostic systems.Conclusion Regardless of post-processing tools,it was equivalent to detect pulmonary nodules with different diameters of Group A or B among medical monochrome LCDs with different resolutions.