SPECT系统心肌断层靶心图分析软件的设计

心肌灌注断层显像是诊断心肌缺血的重要方法，靶心图在断层基础上加以定量分析。作者在与ＴｅｃｈｎｉｃａｒｅＯｍｅｇａ５００伽玛相机联机的ＭＣＳ－５６０计算机系统上设计了靶心图分析软件，将短轴断层图像分成１６个扇区，把各层面各扇区相对计数值以极坐标形式展开，成为一幅彩色靶心图。分析程序可对正常人的心肌灌注断层图像进行定量分析，所得数据存盘，并自动加入早先所测正常人数据，计算出正常人的均值（Ｘ）和标准差（ＳＤ）。以正常值数据库为依据，凡相对计数低于（Ｘ－２．５ＳＤ）的部位，靶心图呈黑色。为表示患者心肌灌注血流与正常人差异情况，同时还显示各层片各扇区与正常均值相差多少ＳＤ的极坐标分布图。为了更明确地显示缺血扇区个数，根据分析数据把低于（Ｘ－２．５ＳＤ）部位的扇区个数以直方图表示。

Integrated Assessment of Cardiac PET/MRI: Co-Registered PET and MRI Polar Plots by Mutual MR-Based Segmentation of the Left Ventricular Myocardium

Background: In the present study, we sought to describe a procedure for the creation of co-registered positron emission tomography (PET) and magnetic resonance imaging (MRI) polar plots of cardiac PET/MRI examinations, validate the resulting plots against available standard methods in patients with myocardial infarction and provide examples that demonstrate the advantage of the novel approach over existing standards. Methods: Co-registered LGE and PET short-axis images were transformed into polar maps based on a radial sampling pattern. LGE was automatically detected using an automated thresholding algorithm (ATA). In 20 PET/MRI examinations in patients with acute myocardial infarction, agreement between manual LGE assessment and the ATA classification was calculated. Also agreement between MRI-segmentation based PET polar plots and standard PET polar plots (created with the Corridor4DM software package) was assessed. Results: No statistically significant difference in infarct sizes between manual and ATA segmentation was found (p = 0.12). Both methods were highly correlated (Pearson’s r = 0.96, p Conclusion: A straightforward software approach for the creation of co-registered PET and MRI polar plots was described and successfully demonstrated in PET/MRI studies of myocardial infarction and inflammation.

品《五牛图》读韩滉其人

我国现存最早的纸本名画《五牛图》，为唐代宰相画家韩滉所作。从这幅稀世名画中，我们不仅可以领略到韩滉精妙的画牛技巧，同时也可以品读到这位宰相画家的政治理想和人格魅力。本文旨在通过品读《五牛图》，分析韩滉的农本思想及忠君思想，来解读其人。

超声牛眼图诊断在不同心脏疾病中的应用

超声牛眼图是基于斑点追踪技术建立起来的心脏超声诊断新方法,可以定量分析心肌组织运动的速度、位移、应变、应变率及旋转角度等动力学行为,综合评价心脏整体与局部的收缩和舒张功能变化,直观、迅速、准确地判定心脏不同节段区域心肌受损的严重程度和病变范围,近年受到美国超声心动图学会和中国超声学会新颁心脏定量测量指南的大力推介。本文概括阐述了超声牛眼图的生成原理和模式类型,简要介绍了超声牛眼图的参数采集和分析方法,重点说明了超声牛眼图在常见心脏疾病,如冠心病、高心病、糖尿病心脏病、甲状腺桥本病心脏损害、原发性心肌病、肺心病、心力衰竭以及评价心脏再同步化治疗等的主要表现和诊断价值,并客观分析了二维超声牛眼图存在的不足之处和未来发展走向,以期推动此项新技术应用的进一步开展。