数字曲面体层X片在评价非负荷期种植体周围骨吸收的临床应用

目的:评价数字曲面体层X片在测量非负荷期种植体周围牙槽骨吸收的应用情况。方法:观测、分析对比26例患者50枚Camlog系统种植体临床应用非负荷期间数字化曲面体层X片和X线牙片上种植体周围牙槽骨吸收的情况。结果:50枚Camlog种植体植入后10 d,两种X片骨吸收测量结果分别为0.65 mm、0.81 mm,两者之间无明显差异;第4个月(或6月\下颌)分别为0.12 mm、0.19 mm,两者之间无明显差异。结论:本研究显示数字化曲面体层X片在测量非负荷期种植体周围牙槽骨吸收的应用中有操作简单、重复性好、精确度高、变形可补偿等优点,有实际应用价值,值得推广。     

早期DSA检查对蛛网膜下腔出血的临床意义

蛛网膜下腔出血（subarachnoid hemorrhage，SAH）是临床发病率和死亡率均较高的急性脑血管病之一，并呈逐年增高趋势。随着神经介入影像学的发展，对急性SAH患早期（72h内1开展数字减影血管造影（digital subtraction angiography．DSA）检查，使SAH的早期病因诊断及病因治疗成为可能，患的预后也得到显改善。我院自2003年1月至2006年4月收治96例SAH患行早期DSA检查并给予相应的病因治疗．取得较好的临床疗效。现将有关资料与临床治疗总结报道如下。[第一段]     

数字图书馆的个性化信息服务

分析了国内外数字图书馆个性化信息服务的现状及相关技术,提出了建立个性化信息服务系统的方法及个性化信息服务中需要注意的问题.     

Case Study of Institution-Building by Nurse Bertha Wright and Colleagues

Purpose: To illuminate the history of nurses' participation in institution-building in the early 1900s, using the Baby Hospital in Oakland, California (now called Children's Hospital Oakland) as a case.
Design: Historical research using a framework of women's history theory focused on the women who founded Oakland's Baby Hospital, 1910–1930.
Method: Data collection included studying original sources, archival material, and interviews. Data evaluation included external criticism for authenticity and genuineness, and internal criticism for accuracy and bias.
Findings: In 1912, nurse Bertha Wright and social worker Mabel Weed, with a circle of community women, including Jessica Peixotto and Jean Howard McDuffie, established the Baby Hospital. Their activism included home visits, education, research, publications, political lobbying, and state policy and program development. At the center of this activity, was the lifelong commitment of Wright and Weed, who created new definitions of family. With social changes in the late 1920s, the male Board of Directors seized control of the hospital, and relegated women to auxiliary roles.
Conclusions: Health and social issues of the United States at the turn of the century are still problematic as a new century approaches and pertain to maternal-child health, foster care, and immigration. Feminists, including nurses, have played a central role in creating solutions. Knowledge of some of their incredible effort has been lost, particularly nursing's history in the western United States.     

Digital movement analysis,a new objective method of measuring tardive dyskinesia and drug-induced parkinsonian tremor: acceptability,reliability and validity

Digital movment analysis (DMA) is a new instrumental approach to assessing oral tardive dyskinesia (TD) by means of digital image processing of a video signal, tracking five paper dots placed around the patient's mouth. A total of 40 schizophrenic patients, 30 with and 10 without TD, were examined twice (with a 3-month interval) with this new device. The patients were further examined with two TD rating scales: the St. Hans Rating Scale for extrapyramidal syndromes (SHRS) and the Abnormal Involuntary Movement Scale (AIMS).The schizophrenic patients accepted the instrumental assessment without any anxiety or resistance. The internal relibility of the apparatus was high, with correlation coefficients of 0.80–0.99. The DMA TD values correlated with the SHRS and AIMS scores with correlation coefficients of 0.48–0.73 indicating an acceptable, although not strong, concurrent validity. Fluctuations occurred from the first to the second examination independent of medication. For these fluctuations no correlation was found between DMA values and rating scores. Finally, the DMA device was able to detect perioral tremor as a sign of parkinsonism.It has been concluded that DMA is a useful supplement to classical TD rating, although further validity evaluation is warranted.     

Value of digital volume tomography in patients with conductive hearing loss

Digital volume tomography (DVT) is an extension of panoramic tomography. With this diagnostic technique, characterized by high resolution, a narrow section width (0.125 mm) and three-dimensional display, small pathological processes can be well visualized. Twenty-five patients with the history of a progressive hearing loss were examined with DVT (Accu-I-tomo, Morita, Japan). The results were compared with pre- and intraoperative findings to evaluate the diagnostic value of DVT in cases of erosion of the ossicular chain. With high resolution and artifact-free demonstration of the middle ear and the ossicular chain, it was possible to define its continuity preoperatively by DVT in all 25 cases. An intact ossicular chain was found by DVT in 13 cases and was later confirmed by surgery. The predicted erosion of the ossicles was verified in 12 patients, and a tympanoplasty type III was performed. Digital volume tomography is an excellent technique to examine the middle ear cleft and inner ear, and expands the application of diagnostic possibilities in the lateral skull base. Therefore, improvement in preoperative diagnosis is achieved along with more accurate planning of the surgical procedure. Digital volume tomography delivers a small radiation dose with a high resolution and a low purchase price for the equipment.     

读图时代的新闻图片编辑

当今人们的阅读方式已悄然进入了读图（图片）时代、读题（标题）时代、读头（头版）时代。新闻图片凭借其强烈的视觉冲击、逼真的情景再现以及直观的信息传递，在带给受众视觉享受的同时，也满足了受众了解真相、直击现场的心理需求。“一图胜千言”的巨大的传播优势，使新闻图片成为报纸在媒体竞争中的一个重要武器。     

An adaptor to the Leksell stereotaxic instrument for digital coordinate determination in radiography

Summary Special perspex adaptors with radiopaque reference structures have been constructed to fit to the Leksell stereotaxic instrument. These structures are visualized on X-ray film in a radiographic examination like angiography or encephalography. The films obtained in two projections at arbitrary angles and focus-film-distances are placed on a digitizing table for the determination of the stereotaxic coordinates of selected targets. The reference structures and the targets are marked with a cursor whereupon a desk top computer performs the calculation of the stereotaxic coordinates. The system allows a rapid, simple and accurate coordinate determination in stereotaxic radiography using the Leksell stereotaxic instrument.     

应用ROC曲线评价DR后处理技术对胸部影像的影响

目的:运用ROC曲线,探讨DR胸部摄影最佳的影像后处理技术。方法:使用DR系统设置的正常胸部摄影条件,对胸部体模与专用于X线摄影的ROC曲线评价体模(TRG)进行组合并曝光。分析未使用后处理技术及使用不同后处理技术,对DR胸部摄影胸片影像的影响。结果:使用单纯噪声消除技术、噪声消除加图像反转及噪声消除加全屏放大三种后处理技术所得的ROC曲线下面积Az值依次为0.85、0.825及0.925,均明显大于未使用后处理技术的面积Az值0.6;单纯噪声消除技术获得的ROC曲线下面积略大于噪声消除加图像反转技术的面积;噪声消除加全屏放大技术获得的ROC曲线下面积Az值最大。结论:应对胸部原始影像实施后处理调节。单纯噪声消除技术可明显增加影像的信息量,若在噪声消除基础上实施全屏放大技术,可获得DR胸部摄影的最大影像信息量。