数字化医院信息安全建设与管理策略探讨

信息安全是数字化医院建设的关键环节,决定着以信息化为手段的医院各项业务的顺利开展。随着医院信息化建设的不断深入,信息安全问题的日益凸显,构建立体化的医院安全体系,注重日常安全防范,不断提升自身安全管理水平是医院信息化建设与管理的重中之重。     

Computed tomography perfusion in evaluating the therapeutic effect of transarterial chemoembolization for hepatocellular carcinoma

AIM： To prospectively assess the changes in parameters of computed tomography （CT） perfusion pre- and post-transarterial chemoembolization （TACE） of hepatocellular carcinoma （HCC） in different treatment response groups, and to correlate the changes with various responses of HCC to TACE. METHODS： Thirty-nine HCC patients underwent CT perfusion examinations pre-（1 d before TACE） and post-treatment （4 wk after TACE）. The response evaluation criteria for solid tumors （RECIST） were referred to when treatment responses were distributed. Wilcoxon-signed ranks test was used to compare the differences in CT perfusion parameters pre- and post- TACE for different response groups.
RESULTS： Only one case had treatment response to CR and the CT perfusion maps of post-treatment lesion displayed complete absence of signals. In the PR treatment response group, hepatic artery perfusion （HAP）, hepatic arterial fracture （HAF） and hepatic blood volume （HBV） of viable tumors post-TACE were reduced compared with pre-TACE （P = 0.001, 0.030 and 0.001, respectively）. In the SD group, all CT perfusion parameters were not significantly different pre- and post-TACE. In the PD group, HAP, HAl=, portal vein perfusion （PVP） and hepatic blood flow （HBF） of viable tumors post-TACE were significantly increased compared with pre-TACE （P = 0.005, 0.012, 0.035 and 0.005, respectively）.
CONCLUSION： Changes in CT perfusion parameters of viable tumors are correlated with different responses of HCC to TACE. Therefore, CT perfusion imaging is a feasible technique for monitoring response of HCC to TACE.     

Use of intravenous digital subtraction ventriculography in the evaluation of left ventricle volumes and ejection fraction

Although intravenous digital subtraction ventriculography (IDSV) is increasingly used to estimate end-diastolic left ventricular volume (EDV), end-systolic left ventricular volume (ESV) and left ventricular ejection fraction (EF), its ability to reproduce the precise estimates provided by left ventricle cineangiography (LVCA) and its role in clinical cardiology have not been unequivocally established. In 32 patients subjected to cardiac catheterization for a variety of cardiac disorders and a normal or reduced left ventricular function the EDV, ESV and EF provided by a 30 degrees right anterior oblique LVCA were compared with those provided by a 30 degrees right anterior oblique IDSV. The mean EDV, ESV and EF obtained by IDSV in the 32 patients were superimposable on those obtained by LVCA. The individual EDV, ESV and EF values provided by the two methods were all related in a close linear fashion. For EF the correlation coefficient was 0.98 and the 90% confidence interval of the mean difference between the two series of values was +/- 6.1%, i.e. +/- 10% error compared to the mean EF provided by LVCA. Thus IDSV is a reliable and not too invasive method for estimating left ventricle volumes and ejection fraction. It might provide serial estimations with a better assessment of the evolution of a patient's disease and the effect of treatment.     

UK reporting radiographers’ perceptions of AI in radiographic image interpretation – Current perspectives and future developments

IntroductionRadiographer reporting is accepted practice in the UK. With a national shortage of radiographers and radiologists, artificial intelligence (AI) support in reporting may help minimise the backlog of unreported images. Modern AI is not well understood by human end-users. This may have ethical implications and impact human trust in these systems, due to over- and under-reliance. This study investigates the perceptions of reporting radiographers about AI, gathers information to explain how they may interact with AI in future and identifies features perceived as necessary for appropriate trust in these systems.MethodsA Qualtrics® survey was designed and piloted by a team of UK AI expert radiographers. This paper reports the third part of the survey, open to reporting radiographers only.Results86 responses were received. Respondents were confident in how an AI reached its decision (n = 53, 62%). Less than a third of respondents would be confident communicating the AI decision to stakeholders. Affirmation from AI would improve confidence (n = 49, 57%) and disagreement would make respondents seek a second opinion (n = 60, 70%). There is a moderate trust level in AI for image interpretation. System performance data and AI visual explanations would increase trust.ConclusionsResponses indicate that AI will have a strong impact on reporting radiographers’ decision making in the future. Respondents are confident in how an AI makes decisions but less confident explaining this to others. Trust levels could be improved with explainable AI solutions.Implications for practiceThis survey clarifies UK reporting radiographers’ perceptions of AI, used for image interpretation, highlighting key issues with AI integration.     

An examination of technologies in complementary medicine education and practice: The perceptions and experiences of naturopathy students,faculty and educational leaders

ObjectivesLittle is known about the education of future CM practitioners. The objective is to explore the perceptions and experiences of students, faculty and professional leaders toward technologies in complementary medicine education and practice.Design and settingQualitative focus groups and one-on-one semi-structured interviews were conducted in CM educational organizations and institutions in North America (United States / Canada) and Australia involving seven focus groups (29 naturopathic students), and 30 one-on-one interviews (faculty, educational and professional leaders of the naturopathic profession).ResultsData analysis identified five issues reported. These related to perceptions of; the shortfalls of CM classroom technology, the value of technology within CM clinical practice, learning technologies in the classroom, addressing equity concerns as a consequence of learning technology use, and the need to develop technology literacy skills amongst students and faculty.ConclusionThis is the first study to examine the perceptions of students, faculty and professional leaders toward technologies in CM education and practice within an education setting. CM students exhibited complex attitudes and adoption patterns to technology. CM students were critical of faculty who have perceived low levels of digital literacy. The technology issue that students in our study found most challenging was PowerPoint use in the classroom. There is an urgent need to establish a strategic research agenda and modelling around this important area of health care education in order to ensure a well-educated, effective workforce able to deliver the best outcomes for the patients and communities they serve.     

数字化技术在胰头癌手术中的应用研究

目的 探讨数字化技术在胰头癌手术中的应用价值。方法 收集10例胰头癌患者的临床资料。采用三维（3D）可视化技术观察血管的变异情况、胰头癌累及的范围、肿瘤与血管关系、胰周肿大淋巴结情况等,同时结合3D打印技术进行实时手术引导。分析术前规划结果、手术情况、手术前后肝功能及糖链抗原199（CA199）水平变化、术后并发症及近期疗效。结果 10例胰头癌患者均完成了基于数字化技术的术前规划及术中导航。所有患者均顺利完成手术。手术时间（315.1±59.5）min,术中出血量325（200,450）ml,手术切缘均达到R0切除标准。10例患者的术后总胆红素、直接胆红素、ALT、AST、CA199均比术前下降（P均< 0.05）。术后发生B级胰瘘1例,经保守治疗后痊愈,无围术期死亡病例。结论 数字化技术适用于胰头癌的术前规划和术中导航,有助于提高手术成功率,降低手术风险。     

Optimisation of radiographic acquisition parameters for direct digital radiography: A systematic review

IntroductionThe objective of this systematic review was to uncover and synthesise all available literature regarding appropriate acquisition parameters for direct digital radiography. It sought to either confirm current practices as optimal, or to uncover practices that may produce more optimised results.MethodsA comprehensive search of published and unpublished literature was undertaken to find studies that evaluated how adjustment of different acquisition parameters affected subjective image quality and patient radiation dose. Eight hundred and fifty-eight studies were retrieved for title and abstract screening. Eighty-nine studies were retrieved for full-text screening, and 23 were included for review and methodological quality screening.ResultsNarrative synthesis of the 23 included studies revealed limited evidence to guide any potential change or acceptance of currently accepted best practice. Meta-analysis was unable to be performed for any of the included studies due to high levels of methodological heterogeneity. A key finding of this review was that the goals of optimisation research varied greatly across the included studies.ConclusionSignificant methodological heterogeneity in the included studies limited the number of clinically relevant findings that would give evidence to an acceptance of, or suggest changes to, currently accepted best practice. Improving consistency in approach across future works of technique optimisation will ensure future systematic reviews will be able to provide strong evidence and meta-analysis will be able to be performed.Implications for clinical practiceThis review highlights that in the literature, studies of optimisation of radiographic acquisition parameters have varying goals. This methodological heterogeneity limits the applicability of systematic reviews and precludes the use of meta-analysis. The authors recommend that a framework for optimisation research be produced as a priority to help improve homogeneity in future research.     

Novel method for selecting slices of the same cross-sectional view from digital tomosynthesis for monitoring posterior spinal instrumentation

BackgroundA method to evaluate pedicle screw loosening on digital tomosynthesis images is yet to be established owing to lack of methods for selecting slices of the same cross-sectional view. We aimed to develop an objective method for selecting slices of the same cross-sectional view on digital tomosynthesis images.MethodsFirst, an objective method of pixel selection was developed by measuring the size of glass disk and titanium alloy screw on digital tomosynthesis images followed by comparison with the actual sizes. Second, a method for selecting slices of the same cross-sectional view was explored on a bone model with posterior spinal instrumentation using the screw centerline and rod curvature as indicators of the same cross section. The angle between the screw centerline and rod was calculated to verify the accuracy in obtaining the same cross-sectional view. Third, the method for selecting slices of the same cross-sectional view was applied to six patients after posterior lumbar spinal instrumentation.ResultsThe pixel selection method enabled objective determination of a pixel on the peripheral lines of objects with an error as low as 200 μm in distance measurements on titanium alloy and glass. The mean differences of rod-screw angles between two slices were less than 1° and were not statistically significant in the bone model and patient images.ConclusionA method for selecting slices of the same cross-sectional view on digital tomosynthesis images was successfully developed. This method can enable objective and quantitative evaluations of pedicle screw loosening.