\MIT-BIH数据的详细说明.pdf

【实例简介】
MIT-BIH数据库数据下载的详细说明，中英文翻译 ，常见问题（注释符号 数据库）
MII-BH数据库下载佯详情 Jack han' s Zone百度空间 页码,3/8 Recorder Records A02,107,11115121 B12 D18,124,217 E101,103,106,108,112,117,119,122,209,219,220,223,233 F104,109,123,205,207,210,215,221 G100,105,114,116,213,214,222,228 H113,201,202,231 120023023234 (It is not known which recorder was used for record 208) (不知道记录208用的那个记录仪) During the digitization process, the analog recordings were played back on a del Mar Avionics model 660 unit. 在数字化过程中,模拟记录在 De mar avionics公司型号660装置上播放 The analog tapes used for records 112, 115 through 124, 205, 220, 223, and 230 through 234 were played back and digitized at twice real time the rest were played back at real time using a specially constructed capstan for the model 660 unit 记录112,115到124,205,220,223,230到234的模拟磁带在第二次实时回放并数字化;其余的利用型号660 装置专门的构建绞盘实时的回放。 Skew between the two signals was found to be as great as 40 milliseconds for some of the analog recorders 对某些模拟记录发现两个信号之间的偏移大到40毫秒。 In addition to the fixed skew that results from extremely small differences in the orientations of the tape heads on the recorder and the playback unit, microscopic vertical wobbling of the tape either during recording or playback, introduces a variable skew, which may be comparable in magnitude to the fixed skew. 除了由记录仪和回放单元磁头方向上极小的差别导致的固定的偏移之外,在记录或回放过程中,磁带垂直方向微小 的颤动引入变化的偏移,幅度比得上固定的偏移 This problem(which also occurs on the aha database) may present difficulties for certain two-channel analysis methods designed for real-time applications 这个问题(AHA数据库也有此问题)可能给为实时应用而设计的一些双通道分析方法带来困难。 Minor tape speed variations should not pose problems for typical arrhythmia detectors. It is difficult to avoid tape sticking or slippage during low-speed playback, and several episodes of tape slippage were noted and marked with comment annotations 小的磁带速度变化不应该对典型心律失常检测器造成问题。很难避免磁带低速凹放过程中的粕着或滑动,儿处 磁带产生滑动的片段用注释符号进行了注释或标记。 Wow and flutter should be studied carefully in the context of heart-rate variability studies, since flutter compensation was not possible in these recordings 摇晃和抖动在心率变异性硏究方面应该认真的硏究,因为这这些记录中不可能对抖动进行补偿(校正)。 A number of frequency-domain artif acts have been identified and related to specific mechanical components of the recorders and the playback unit 许多频域的伪迹已经被识别出来并且找到了和记录仪和播放单元具体机械韶件的关系: Frequency团H Source 0.042 Recorder pressure wheel 0.083 Playback unit capstan(for twice real-time playback) 0.090 ecorder capstan http://hi.baidu.com/%do%c4%d2%ed%0d4%bo/blog/itcm/9264f2363b582c225ab5...2011 MII-BIH数据库下载/详情 Jack han’ s Zone百度空间 页码,48 0.167 layback unit capstan (for real-time playback) 0. 18-0.10 Takeup reel(frequency decreases over time) 0. 20-0.36 Supply reel(frequency increases over time) 0.042Hz----音机压力轮 0.083Hz---放怕元绞盘(第二次实时回放) 0.090Hz-----录音机绞盘 0167Hz---放单元绞盘(实时回放) 0.18-0.10Hz -收带卷轴(频率随时间减小) 0.20-0.36H--带卷轴(频率随时闻增加) The most significant of these artifacts by far is the 0. 1 67 Hz artifact on recordings that were played back at real time 到目前为止,最为严重的是实时回放记录时的0.167Hz伪迹。 The next largest is the 0.090 Hz artifact; the 0.083 Hz artifact on recordings that were played back at twice real-time of roughly the same magnitude as the 0.090 Hz artifact. The 0.042 Hz artifact is of much lower magnitude. Other frequencies related to the drive train(at 0. 42 Hz, 1.96 Hz, 9. 1 Hz, and 42 Hz) do not appear as noticeable artifacts The frequencies of the last two artifacts listed in the table depend on how much tape is on the supply and takeup reels; the supply reel causes a much more noticeable artifact than does the takeup reel. Other frequency-domain artifacts generated by the supply reel appear in the 0. 10-0. 18 Hz and 0.30-0.54 Hz bands Four of the 48 records(102, 104, 107, and 217)include paced beats. The original analog recordings do not represent the pacemaker artifacts with sufficient fidelity to permit them to be recognized by pulse amplitude (or slew rate)and duration alone the method commonly used for real-time processing. the database records reproduce the analog recordings with sufficient fidelity to permit use of pacemaker artifact detectors designed for tape analysis, however. 接下来最大的是0.090Hz伪迹,第二次实时回放引入的0.083Hz伪迹大约和0.090H伪迹有相同幅度。0.042Hz伪迹 幅度低得多。与传动系统相关的其它频率(0.42Hz,1.96Hz,9.1Hz42H)没出现明显的伪迹。表中列出的最后两个 伪迹的频率依赖于在放带和收带卷轴上还有多少磁带;放带卷轴比收带卷轴引入更加明显的伪迹。由放带卷轴产生 的其它频率域上的伪迹出现在0.100,18Hz和0.30054Hz频段。48个记录中有4个(102,104,107,217)包含起 搏心拍。原始的模拟记永没有以足够的俣度表小起器伪迹,是够的保真度可以允许伪迹仅通过脉冲幅度(或 斜率)和时限被识别出来,这种方法常用于实时处理。然而,数据库记录重新生成具有足够保真度的模拟记录从而 允许为对磁带分析而设计的起搏器伪迹检测器的使用 ight 数字化 The analog outputs of the playback unit were filtered to limit analog-to-digital converter(ADC) saturation and for anti-aliasing, using a passband from 0. 1 to 100 Hz relative to real time, well beyond the lowest and highest frequencies recoverable from the recordings 冋放装置的模拟输出被滤波以限定模拟-数字转换(ADC饱和度和抗混叠,利用通带0.1到100Hz相对实时的滤 波,远远超出了从模拟记录可以恢复的最低和最高频率 The bandpass-filtered signals were digitized at 360 Hz per signal relative to real time using hardware constructed at the mit Biomedical Engineering Center and at the BIH Biomedical Engineering Laboratory 带通滤波后何个信号相对实时的以360Hz速率被数字化,使用MIT生物区学程中心和BIH生物医学程实验室搭 建的硬件。 The sampling frequency was chosen to facilitate implementations of 60 Hz(mains frequency digital notch filters in arrhythmia detectors Since the recorders were battery-powered, most of the 60 Hz noise present in the database arose during play back In those records that were digitized at twice real time, this noise appears at 30 Hz (and multiples of 30 Hz) relative to real time 采样率的选择是为了便于心律失常检测器中60Hz(工频)数字陷波的实现。由于记录仪用电浊供电,出现在数据 库中的人多数60Hz噪声是在回放过程中引入的。那些在第二次实时回放被数字化的记录中,相对于实时数字化 录这种噪声出现在30Hz(及30Hz整数倍)处。 Samples were acquired from each signal al most simultaneously(the intersignal sampling skew was on the order o http://hi.baidu.com/%do%c4%d2%ed%0d4%bo/blog/itcm/9264f2363b582c225ab5...2011 MII-BH数据库下载/详情 Jack han's zone百度空间 页码,5/8 few microseconds. As noted above, analog tape skew was several orders of magnitude larger. The adcs were unipolar, with 11-bit resolution over a +5 mV range. Sample values thus range from o to 2047 inclusive, with a value of 1024 corresponding to zero volts 从每个信号几乎同时地获取采样值(信号闫的(通道间的)采样偏移是在几个微妙的级别上)。如上所述,模拟磁带 的偏移幅度上大奷几级别。模欻转换器是单极的,11位分辨率,信号范围±5mV。因此采样值在0到2047的范围 内,1024对应0伏。 The 1l-bit samples were originally recorded in 8-bit first difference format (this was necessary because of limited mass storage capacity Given the sampling frequency and the resolution of the adC, the difference encoding implies a maximum recordable slew rate of #225 mV/s In practice this limit was exceeded by the input signals very infrequently, only during severe noise on a small number of records. The effect on the quality of the recorded signals is totally negligible. On this CD-ROM, the samples have been reconstructed from the first differences and stored as pairs of 12-bit amplitudes packed in triplets of consecutive bytes for details on the storage format see signal(5)) 11位采样值起初用8位一阶差分的格式记录(由于大容量存储能力的限制,这么做是必要的)。所给ADC的采样率 和分辨率,差分编码意味着最大可记录斜率是±225mν/s。在现实中,这个限制很少被输入信号超岀,仅在少量记 录上出现一些噪声时超过此界限。这对记录信号质量的影响完全可以忽略。在光盘上,采样值被从一阶差分重建并 用12位幅倌对打包成连续三个字节构成的组的格式存储(关于存储格式的细节参见 signal(5))。 Annotations 注释 An initial set of beat labels was produced by a simple slope-sensitive QRS detector, which marked each detected event as a normal beat 起初的心拍标识是由一个简单的对斜率敏感的QRS检测器产生的,标记每个检测到的事件并看做正常心拍。 Two identical 150-foot chart recordings were printed for each 30-minute record, with these initial beat labels in the margin 对每一个30分钟记汞,两个相同长度的150英尺的卷图被打印出来,在边缘带有初始的心拍标签。 For each record, the two charts were given to two cardiologists, who worked on them independently. The cardiologists added additional beat labels where the detector missed beats deleted false detections as necessary, and changed the labels for all abnormal beats. they also added rhythm labels signal qual ity labels and comments 对每一个记录,两个图交绘两个心脏病学家,他们独立地工作。心脏病学家添加额外的心拍标识在检测器漏掉的 心拍,检測错误的心拍,对改变所有异常心拍标识。他们也添加节律标识,信号质量标识,注释。 The annotations were transcribed from the paper chart recordings. once both sets of cardiologists annotations for a given record had been transcribed and verified they were automatically compared beat-by-beat and another chart recording was printed. This chart showed the cardiologists annotations in the margin, with all discrepancies highlighted each discrepancy was reviewed and resolved by consensus. The corrections were transcribed and the annotations were then analyzed by an auditing program, which checked them for consistency and which located the ten longest and shortest R-R intervals in each record to identify possible missing or falsely detected beats) 注释从纸质的图标记录上转录下来。一旦心脏病学家对一个给定记录的两组注释的转录与核实完成,它们自动地 逐拍比较,另一个图表记求被打印。这个图表在边缘显示心脏病学家的标注,所有的差异被凸显出来。每一处差异被 重新审查并经协商一致后决定。更正被转录,注释然后用一个审核程序进行分析,检查它们的一致性并且在每一个 记录中定位10个最长和最短的RR间期(用来识别可能遺漏或错误检测的心拍)。 not always located precisely at the peak. In copies of the database made since 1983, the beat labels have been e In early copies of the database, most beat labels were placed at the r-wave peak, but manually inserted labels were shifted from their original locations 在数据厍早期的副本中,大多心拍标签被置丁R波峰值点,但是手工的插入标签不总是定位到精确的峰值点。自从1983 年制作的数据库副本屮,心拍标签从原始的位置上做了移动。 The ECG ( usually the upper signal) was digitally bandpass-filtered to emphasize the QRS complexes, and each bea label was moved to the major local extremum, after correction for phase shift in the filter. a few noisy beats were manually realigned http://hi.baidu.com/%do%c4%d2%ed%0d4%bo/blog/itcm/9264f2363b582c225ab5...2011 MII-BH数据库下载/详情 Jack han's zone百度空间 页码,6/8 ECG(通常是第一个信号)绎数字带通滤波处理以突岀QRS复合波,在对滤波的相移校准之后,每个心拍标笭被移动 到最大局部极值点。许多噪声污染严重的心拍于工进行了对齐啁整。 This process was applied to all records except record 117 in 1983; the beat labels for record 117 were not realigned until March 1998, however 在1983年,这个处理过程应用到除117以外的所有记录;记录117的心拍标签没有被重新调整直到1998年三 月 The result is that annotations generally appear at the r-wave peak, and are located with sufficient accuracy to make the reference annotation files usable for studies requiring waveform averaging and for heart rate variability studi (but note the comments with respect to analog tape wow and flutter above) 结果是注释一般出现在R波峰值点,定位足够精确,使得参考注释文件可用于要求波形平均的硏究和心率变异性研 究(但要注意到上面关于模拟磁带晃动和抖动的注解)。 In the annotated eCg plots produced by psfd and pschart, and in printed copies of this directory each label is placed so that the fiducial mark for the annotation corresponds to the left edge of the label 在psfd和 mschart生成的带标注的ECG图中,及在这个目录的打印副本中,每个标签被标出,标签的左侧边缘对应 着该标注的基准点(对起点)。 The database contains approximately 109,000 beat labels. Sixteen were corrected in the first seven years after the database was released in 1980 (in records 104, 108, 114, 203, 207, 217, and 222); 数拈库包含大约109,000个心拍标记。在1980年数拈库发布后的头7年里有16处被史正(在记录104,108,114, 203,207,217,222屮) in addition, all of the left bundle branch block beats in record 214 were originally labelled as normal beats 此外,记录214中所有左束支阻滞心拍起初是标记为正常心拍。 The rhythm labels have been more substantially revised and now include notations for paced rhythm, bigeminy, and trigeminy, which were missing in early copies. 节律的标注做了很大修改,现在包括起搏节律,联率,三联律的注释,这些是在早期副本中找不到的 In October 1998, a rhythm label in record 203 was corrected 1998年10月,记汞203中节律标识被更正。 In October 2001, a seventeenth error in the beat labels was discovered and corrected (in record 209) 2001年10月,心拍标识中的第十七个错误被发现和更正(记录209中)。 In April 2003, 26 PVC annotations in record 119 were manually realigned by small amounts(up to 74 ms) 2003年四月,记录119中26个PVC注释被手工微调重新对齐(直到74m5)。 In May 2003, an eighteenth error in the beat labels was discovered and corrected (in record 214) 2003年五月,心拍标注的第十八个错误被发现和更正(记录214) In April 2005, many of the episodes previously labelled as atrial fibrillation in record 222 were partially or completely relabelled as atrial flutter 2005年4月,记录222中先前标记为房颤的很多片段部分地或全部地重新标注为房扑。 In April 2008, three beat labels were corrected( two in record 108, and one in record 215) 2008年四月,三个心拍标记被更正(108屮有两个,215屮有一个) In June 2010, the 22nd and 23rd errors in the beat labels were found and corrected (both in record 203) 2010年6月,心拍标记中的第22,23个错误被发现和更正(都在203中) Thanks to Bob Bruce, Pat Hamilton Yin Dengfeng(#a: k), Roger Mark, Sebastian Vasquez, and Mariano Llam Soria for finding and reporting these errors http://hi.baidu.com/%do%c4%d2%ed%0d4%bo/blog/itcm/9264f2363b582c225ab5...2011 MII-BH数据库下载/详情 Jack han's zone百度空间 页码,7/8 Symbols used in plots 绘图用符号 TAn expanded and updated version of the table below can be found at http://www.physionet.org/physiobank/annotations.shtml.i 扩充和更新的下表,可以在。。。。。找到。 Symbol Meaning or N Normal beat 正常心拍 eft bundle branch block beat -束支阻滞心拍 Right bundle branch block beat--束支阻滞心拍 Atrial premature beat 房性早搏心拍 berrated atrial premature beat-:的(发生畸变的)房性早搏心拍 Nodal (junctional) premature beat-(交界)性早心拍 Supraventricular premature beat ----- 室上性早抽心拍 Premature ventricular contraction --- 室性期前收缩 Fusion of ventricular and normal beat-性与正常心拍的融合波 tart of ventricular flutter /fibrillation-室扑动/纤颤的起点 entricular flutter wave 室扑动波 End of ventricular flutter/ Fibrillation--室扑动/纤颤的终点 trial escape beat -房性逸搏心拍 Nodal (junctional) escape beat --(交界)性逸搏心拍 Ventricular escape beat -性逸搏心拍 Paced beat --起搏心拍 Fusion of paced and normal beat 起搏和正常心拍的融合波 下 Ion-conducted p-wave( blocked APB)--传P波(阻湍的房性早搏心拍) Unclassifiable beat 分类心拍 Isolated QRS-like artifact 孤立的类似QRS的伪迹 Rhythm annotations appear below the level used for beat annotations 节律注释符号纵别低于心拍注释符号 AB trial bigeminy---房性二联率 (AFIB trial fibrillation -房 (AFL Atrial flutter -房扑 B /entricular bigeminy--性二联率 (BII 20 heart block --2度心脏阻滞 Ivr Idioventricular rhythm---室自主节律 Normal sinus rhythm 正常窦性节律 NoD卜oda( A-V junctional)hyhm--结(房交界)性节律 Paced rhythm tent tt nt tu -起搏节律 PREX Pre-excitation(WPW) -预激综合征 sbr inus bradycardia 性心动过缓 (SVTA Supraventricular tachyarrhythmia -室上性心动过速 entricular trigeminy ---室性三联律 VEL entricular flutter 心室扑动 VT Ventricular tachycardia 室性心动过速 Signal quality and comment annotations appear above the level used for beat annotations 信号质量和注解的注释符号级别高于心拍标记符号的水平: Signal quality change: the first character(c'or'n,)indicates the quality of the upper signal (clean or noisy), and the second character indicates the quality of the lower signal--倍号质量变化:第 序符(c或n)表示第_个信号的质量(干净或干扰大),第二个字符表示第二个信号质量 http://hi.baidu.com/%do%c4%d2%ed%0d4%bo/blog/itcm/9264f2363b582c225ab5...2011 MII-BH数据库下载佯详情 Jack han' s Zone百度空间 页码,8/8 xtreme noise or signal loss in both signals: ECG is unreadable-两个信号上都有极严重的噪声或 言号缺失:ECG不能读取 M(Or MISSB) Missed beat 漏掉的心拍(心肛在该位置少一个搏动) Cor PSEPause (心脏)暂停 (or TS)Tape slippage --带滑动 上篇>>WFDB软件包介绍下篇>> Fortuneclient-Q4自带例子 类别:默认分类1分享添加到搜藏1分享到贴吧1浏览(221评论(1) 网友评论 1 lamy8952011-08-1911:25 回复 很牛很厉害 发表评论 姓名 hefanr 内容: 厂同时将此文音分享给好友 验证码 请击后输入四位验证码,字尽不区分大小写 发表评论 http://hi.baidu.com/%do%c4%d2%ed%0d4%bo/blog/itcm/9264f2363b582c225ab5...2011 【实例截图】
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