翼状胬肉切除加自体结膜转位术与单纯切除的疗效观察

目的观察翼状胬肉逆行切除加自体结膜转位术防止胬肉复发的临床疗效。方法逆行将翼状胬肉头部自角膜上分离,向泪阜方向及上下钝性分离结膜及其下方增生变性组织,直至近半月皱襞处,全部切除胬肉。转位相邻带干细胞的自体结膜于巩膜裸露区。结果40例46只眼的翼状胬肉患者的角膜上皮、结膜上皮缺损区均在术后1~2 d全部愈合,随访8~16个月,1例复发。结论翼状胬肉逆行切除加自体结膜转位术简单易操作,并可较大程度地降低胬肉术后复发率。     

锁边缝合在翼状胬肉摘除联合自体角膜缘干细胞移植术中的应用

目的 探讨锁边缝合在翼状胬肉摘除联合自体角膜缘干细胞移植术中的应用及其临床效果.方法 选择本院65例翼状胬肉患者采取自体角膜缘干细胞移植后行锁边缝合进行治疗.术后随访5月～1年.结果 65例中63例治愈,2眼复发.结论 自体角膜缘干细胞移植后行锁边缝合治疗翼状胬肉方法简单,疗效可靠.     

自体角膜缘干细胞移植治疗复发性翼状胬肉的疗效分析

目的:探讨自体角膜缘干细胞移植术治疗复发性翼状胬肉的临床疗效.方法:对36例42眼复发性翼状胬肉行胬肉切除联合自体角膜缘干细胞移植治疗,术后随访6个月至2年.结果:仅有1眼复发,复发率为2.38％.结论:自体角膜缘干细胞移植术治疗复发性翼状胬肉复发率低,创面修复快,效果理想,值得推广应用.     

准分子激光角膜屈光手术后常见并发症的护理

准分子激光角膜屈光手术因具有安全性、有效性和可预测性等优点而广泛运用临床。近年来，随着准分子激光角膜屈光手术的普遍开展．其术后并发症也时有发生。我院近年实施准分子激光角膜屈光手术1248例，屈光度-1．3DS-14．0DS，经过精心的手术和护理效果满意。现将施行准分子激光角膜屈光手术常见并发症及护理体会报告如下。     

自体角膜缘干细胞移植在翼状胬肉手术中的应用

目的 观察自体角膜缘干细胞移植对手术治疗翼状胬肉的效果。方法 随机选择21例翼状胬肉眼（包括静止期,活动期和复发性胬肉）,显微手术切除病变组织后,行自体角膜缘干细胞移植术。结果 角膜上皮修复和植片存活均出现在术后3－5天内。随访6－24个月,19例痊愈,仅2例复发（9．52％）。结论 按显微手术方式切除翼状胬肉,并行自体角膜缘干细胞移植,治疗各种类型翼状胬肉效果良好,有临床推广使用价值。     

LASIK术后1年拳击伤致角膜破裂1例

准分子激光原位角膜磨镶术（laserin situ keratomileusis，LASIK）由于保留了角膜上皮及前弹力层，手术效果具有可预测性，术后无明显疼痛刺激，视力提高迅速，是较成熟的手术。但是相应的手术并发症亦随着手术数量的增加而逐渐被重视。我科2005年6月收治了1例LASIK术后1年因眼拳击伤致角膜破裂的患者，现报告如下。     

两种不同翼状胬肉手术方法的临床疗效比较

翼状胬肉传统的手术方式术后复发率较高,我院眼科2005年5月-2008年5月采用翼状胬肉切除联合羊膜移植术和翼状胬肉切除联合自体带有角膜缘干细胞球结膜移植术进行治疗,现将两种术式的疗效比较报告如下.     

自体角膜缘干细胞移植治疗翼状胬肉手术中应用丝裂霉素C对角膜内皮、角膜上皮的影响

目的探讨自体角膜缘干细胞移植治疗翼状胬肉手术中应用丝裂霉素C对角膜内皮、角膜上皮的影响。方法本实验组筛选46例原发性翼状胬肉的患者（46只眼）,所有患者均接受胬肉切除手术,然后行角膜缘干细胞移植联合丝裂霉素C。分别测量术前、术后角膜内皮细胞密度、变异系数及六角形细胞百分比,观察角膜创面上皮愈合情况并记录愈合时间。结果随访期内胬肉复发1例（2.2%）。各阶段角膜内皮细胞密度、平均变异系数以及平均六角形细胞百分比值比较无明显差异（P〉0.05）。角膜荧光素染色阴性平均时间为（4.20±1.05）d。结论翼状胬肉切除术联合自体角膜缘干细胞移植术中使用0.02%丝裂霉素C延长术后角膜创面愈合时间,但不会对角膜内皮产生急性毒性作用,手术复发率低。     

断层角膜地形图引导的个体化LASIK矫正近视和散光早期临床疗效分析

目的:评价断层角膜地形图引导的个体化准分子激光原位角膜磨镶术矫正近视和散光的安全性、有效性和可预测性。方法:应用Oculyzer断层角膜地形图系统(Wavelight,Inc)获取角膜形态资料,联机Allegretto Wavelight Q-eye准分子激光系统和应用Oculink个体化切削手术程序对24例47只眼,行Oculink引导的个体化LASIK手术,评价术后1个月的临床疗效。结果:(1)安全性:术后最佳矫正视力无下降2行及以上,下降1行的为5只眼(占10.64%)。(2)有效性:所有患者术后1个月视力均在5.0以上为100%;5.1以上为78.8%。(3)可预测性:术后1个月等效球镜为(-0.03±0.08)D,在±0.25 D以内为100%。(4)视觉质量评估:术后1个月高阶像差C12和C13较术前明显增大(P0.05)。与术前对比敏感度相比,术后1个月暗光和眩光在低频区明显提高(P0.05)。结论:断层角膜地形图引导的个体化LASIK矫正近视和散光具有较高的安全性、有效性和可预测性,远期疗效有待进一步随访和研究。     

军人LASIK术后450例视觉质量分析

准分子激光原位角膜磨镶（LASIK）术以其良好的稳定性、安全性和可预测性，被认为是目前最有发展前景的角膜屈光手术。我们通过问卷调查和随访观察，对军人LASIK术后450例进行了视觉质量调查。现分析报告如下。     

Research on time-course differential imaging by bone scintigraphy

The temporal image subtraction technique was applied to bone scintigraphy, using Photoshop (commercially available image processing software) and Morpher (public domain warping software). For the temporal subtraction images, 81 subtraction images (19 cases) were prepared by a method used to subtract the previous images from the current ones. Registration of the current and previous images was performed by manual operation using Photoshop, and warping was done using the warping function of Morpher. In addition, difference images prepared after correcting the distributions of radioactive isotopes of the current and previous images using the count of the pelvic region were also examined. Compared with manual operation, alignment of images by warping improved registration and reduced the generation of pseudo-images of subtraction images. The rate of identification of abnormal accumulation-enhanced regions and subjective evaluation by doctors was improved for warping more than for manual operation. Furthermore, abnormal hot regions, which are difficult to find in film images, could be found in three subtraction images. In addition, it was confirmed that abnormal hot regions become more visible in many cases by preparing subtraction images after correcting the count between images using the count of the pelvic region. Thus, it is suggested that the temporal image subtraction technique in bone scintigraphy enables more accurate observation of enhancement of or changes in abnormal hot regions, which will support diagnostic reading. It is considered that enhancement of or changes in abnormal hot regions will be more accurately understood through further detailed discussion in the future.     

小波分析技术在面颈部肿大淋巴结超声诊断中的价值

目的使用Fhotoshop软件技术,观察研究面颈部肿大淋巴结的图像纹理空间分布特征表现,以提高超声诊断能力。方法将超声获取的图像组织,再经Fhotoshop技术色彩变换和变换后小波系数与图像局部特征的对应关系进行分析:即行细节按列排序,列细节按行排序,对角线细节按斜Z排序。结果通过对面颈部肿大淋巴结的图像测定和小波技术分析,提供了频谱数据及图像的纹理分析信息,获取了病灶区域与正常组织纹理定量的数据描述。结论小波分析技术为临床诊断面颈部肿大淋巴结提供了分辨和分析病灶性质、程度的可靠依据。     

小波分析技术在椎旁及腰大肌肿块超声诊断中的应用

目的使用photoshop计算机技术,观察研究肿块组织的纹理空间分布特征表现,以提高超声诊断能力。方法将超声获取的图像组织,再经photoshop技术的变换和变换后的小波系数与图像的局部特征的对应关系进行分析,即:行细节按列排序,列细节按行排序,对角线细节按Z排序。结果通过对椎旁及腰大肌肿块组织的图像测定和小波技术分析,提供了频谱数据及图像的纹理分析信息,获取了病灶区域与正常组织的纹理定量的数据描述。结论小波分析技术为临床诊断椎旁及腰大肌肿块提供了分辨和分析病灶性质、程度的可靠依据。     

Clinical efficacy of a new software developed for dental digital subtraction radiography

OBJECTIVES: The aim of this study was to test and compare the efficacy of software developed recently for digital subtraction radiography (DSR) in vivo. METHODS: An algorithm performing both manual and automated image reconstructions and contrast correction was developed for the manipulation of radiographic images. Pre- and post-operative radiographic images of ten patients were obtained and the automated subtraction analyses were performed using four different softwares (new software, Emago, Photoshop 8.0 and Paintshop Pro 9). Ten experienced dental specialists evaluated the clinical efficacy of each program and scored the softwares by using visual analogue scales (VAS). The results were statistically analysed and alpha was set as 0.05. RESULTS: The newly developed algorithm received higher scores than the others (new software =67.89, Emago = 64.26, Paintshop Pro 9 = 33.41 and Photoshop 8.0 = 27.24, respectively). The clinical efficacies of the new software and Emago were not significantly different (P = 0.720); likewise, Photoshop 8.0 and Paintshop Pro 9 performed comparably (P = 0.295). CONCLUSIONS: Considering this study, the new software and Emago would be suggested for DSR in dental practice.     

Prospects for computer modeling technology of osteosynthesis in fractures of bones of the lower limbs

To improve the results of treatment of the patients with femur and shin bone fractures the digital processing of video-information and computer simulation of perosseous osteosynthesis were used. The roentgenogram analysis was conducted using the personal computer equipped with the tolls for image input and visualization and software for data processing. 235 patients with femur and shin bone fractures were treated. The method of perosseous osteosynthesis was used in 127 of them. The digital computer simulation of the operation was conducted in 75 patients. The method has allowed to improve the anatomic and functional results, to reduce the treatment duration, to decrease the number of complications and unsatisfactory outcomes, to optimize the method of perosseous osteosynthesis in the whole.     

多平面经食管旋转扫描超声心动图像的三维重建

目的 进行经食管旋转扫描超声心动图像的三维重建算法的基础研究,并开发相应三维重建软件系统。方法 首先,使用食管导入旋转扫描超声成像技术获得一系列在空间按一定角度分布的动态超声心脏图像,并同步记录心电信号。然后,根据心电及角度信号提取正确原始切片图像,进行预处理,并利用三维直接匹配插值方法对旋转扫描超声心动图像进行插值,获得规则体数据。最后,采用直接体绘制方法对体数据进行重建。结果 实现了全部重建算法,并对一组旋转扫描超声心动图像进行了三维重建实验,获得了左心室的真实感三维重建图像。结论 由于经食管扫描超声心动图像原始质量较好,并且本研究中采用了针对超声图像自身特点的图像预处理和三维直接插值方法,使得我们可以获得高质量的超声心脏体数据,从而获得良好的重建结果。     

自编图像数字化处理软件，提高乳癌X线诊断率（附128例分析）

目的研究自编计算机图像处理软件,提高钼靶X线片中乳癌的诊断率.材料与方法应用图像数字处理的计算机技术编制软件,对128例乳腺癌X线片(包括8例Tn级乳腺癌、19例假阳性和25例假阴性病乳腺癌)进行图像分析,并作回顾性研究.结果经处理的乳腺X线片图像清晰度明显提高,良、恶性肿瘤图像有明显的差异,早期乳腺癌微小钙化灶的显示尤为清晰.结论自编的计算机软件,应用于乳腺钼靶X线片的数字化图像处理,有利于提高早期乳腺癌诊断率.     

Geometrical verification system using Adobe Photoshop in radiotherapy

PURPOSE: Adobe Photoshop is used worldwide and is useful for comparing portal films with simulation films. It is possible to scan images and then view them simultaneously with this software. The purpose of this study was to assess the accuracy of a geometrical verification system using Adobe Photoshop. MATERIALS AND METHODS: We prepared the following two conditions for verification. Under one condition, films were hanged on light boxes, and examiners measured distances between the isocenter on simulation films and that on portal films by adjusting the bony structures. Under the other condition, films were scanned into a computer and displayed using Adobe Photoshop, and examiners measured distances between the isocenter on simulation films and those on portal films by adjusting the bony structures. To obtain control data, lead balls were used as a fiducial point for matching the films accurately. The errors, defined as the differences between the control data and the measurement data, were assessed. RESULTS: Errors of the data obtained using Adobe Photoshop were significantly smaller than those of the data obtained from films on light boxes (p < 0.007). CONCLUSION: The geometrical verification system using Adobe Photoshop is available on any PC with this software and is useful for improving the accuracy of verification.     

Comparison of simulated periodontal bone defect depth measured in digital radiographs in dedicated and non-dedicated software systems

OBJECTIVES: To compare simulated periodontal bone defect depth measured in digital radiographs with dedicated and non-dedicated software systems and to compare the depth measurements from each program with the measurements in dry mandibles. METHODS: Forty periodontal bone defects were created at the proximal area of the first premolar in dry pig mandibles. Measurements of the defects were performed with a periodontal probe in the dry mandible. Periapical digital radiographs of the defects were recorded using the Schick sensor in a standardized exposure setting. All images were read using a Schick dedicated software system (CDR DICOM for Windows v.3.5), and three commonly available non-dedicated software systems (Vix Win 2000 v.1.2; Adobe Photoshop 7.0 and Image Tool 3.0). The defects were measured three times in each image and a consensus was reached among three examiners using the four software systems. The difference between the radiographic measurements was analysed using analysis of variance (ANOVA) and by comparing the measurements from each software system with the dry mandibles measurements using Student's t-test. RESULTS: The mean values of the bone defects measured in the radiographs were 5.07 mm, 5.06 mm, 5.01 mm and 5.11 mm for CDR Digital Image and Communication in Medicine (DICOM) for Windows, Vix Win, Adobe Photoshop, and Image Tool, respectively, and 6.67 mm for the dry mandible. The means of the measurements performed in the four software systems were not significantly different, ANOVA (P = 0.958). A significant underestimation of defect depth was obtained when we compared the mean depths from each software system with the dry mandible measurements (t-test; P approximately equal to 0.000). CONCLUSIONS: The periodontal bone defect measurements in dedicated and in three non-dedicated software systems were not significantly different, but they all underestimated the measurements when compared with the measurements obtained in the dry mandibles.