BIDS CHB-MIT Scalp EEG Database

This dataset is a BIDS-compatible version of the CHB-MIT Scalp EEG Database. It reorganizes the file structure to comply with the BIDS specification. To this effect: The data from subject chb21 was moved to sub-01/ses-02. Metadata was organized according to BIDS. Data in the EEG edf files was modified to keep only the 18 channels from a double banana bipolar montage. Annotations were formatted as BIDS-score compatible `tsv` files. Details related to access to the data License The dataset is released under the Open Data Commons Attribution License v1.0. Contact person The original Physionet CHB-MIT Scalp EEG Database was published by Ali Shoeb. This BIDS-compatible version of the dataset was published by Jonathan Dan. Practical information to access the data The original Physionet CHB-MIT Scalp EEG Database is available on the Physionet website. Overview Project name CHB-MIT Scalp EEG Database Year that the project ran 2010 Brief overview of the tasks in the experiment This database, collected at the Children's Hospital Boston, consists of EEG recordings from pediatric subjects with intractable seizures. Subjects were monitored for up to several days following withdrawal of anti-seizure medication in order to characterize their seizures and assess their candidacy for surgical intervention. Description of the contents of the dataset Each folder (sub-01, sub-01, etc.) contains between 9 and 42 continuous .edf files from a single subject. Hardware limitations resulted in gaps between consecutively-numbered .edf files, during which the signals were not recorded; in most cases, the gaps are 10 seconds or less, but occasionally there are much longer gaps. In order to protect the privacy of the subjects, all protected health information (PHI) in the original .edf files has been replaced with surrogate information in the files provided here. Dates in the original .edf files have been replaced by surrogate dates, but the time relationships between the individual files belonging to each case have been preserved. In most cases, the .edf files contain exactly one hour of digitized EEG signals, although those belonging to case sub-10 are two hours long, and those belonging to cases sub-04, sub-06, sub-07, sub-09, and sub-23 are four hours long; occasionally, files in which seizures are recorded are shorter. The EEG is recorded at 256 Hz with a 16-bit resolution. The recordings are referenced in a double banana bipolar montage with 18 channels from the 10-20 electrode system. The dataset also contains seizure annotations as start and stop times. The dataset contains 664 `.edf` recordings. 129 those files that contain one or more seizures. In all, these records include 198 seizures. Methods Subjects 23 pediatric subjects with intractable seizures. (5 males, ages 3–22; and 17 females, ages 1.5–19; 1 n/a) Apparatus Recordings were performed at the Children's Hospital Boston using the International 10-20 system of EEG electrode positions. Signals were sampled at 256 samples per second with 16-bit resolution.

本数据集为适配脑成像数据结构标准（Brain Imaging Data Structure, BIDS）的CHB-MIT头皮脑电图数据库版本，其重构了文件结构以符合BIDS规范。具体调整如下：将chb21号受试者的数据迁移至sub-01/ses-02路径下；元数据已按照BIDS规范完成整理；脑电图EDF（European Data Format, EDF）文件中的数据已被修改，仅保留双香蕉双极导联布局中的18个通道；标注文件已格式化为兼容BIDS-score的TSV（Tab-Separated Values, TSV）文件。

数据获取与授权相关说明：本数据集采用开放数据通用署名许可协议v1.0（Open Data Commons Attribution License v1.0）进行发布。
联系人：原始PhysioNet CHB-MIT头皮脑电图数据库由Ali Shoeb发布，本适配BIDS的数据集版本由Jonathan Dan发布。
数据获取实用信息：原始PhysioNet CHB-MIT头皮脑电图数据库可在PhysioNet官网获取。

概述
项目名称：CHB-MIT头皮脑电图数据库
项目实施年份：2010年
实验任务概述：本数据库由波士顿儿童医院采集，收录了患有难治性癫痫的儿科受试者的脑电图记录。受试者在停用抗癫痫药物后被监测长达数日，以明确其癫痫发作特征并评估其手术干预的适配性。

数据集内容说明
每个文件夹（如sub-01、sub-01等，原文存在笔误重复）包含来自单个受试者的9至42个连续EDF文件。受硬件限制，编号连续的EDF文件之间存在信号未被记录的间隙；多数情况下间隙时长不超过10秒，但偶尔也会出现更长的间隙。
为保护受试者隐私，本数据集提供的文件中已将原始EDF文件内的所有受保护健康信息（Protected Health Information, PHI）替换为替代信息。原始EDF文件中的日期已替换为替代日期，但保留了每个病例所属各文件之间的时间关联。
多数情况下，单个EDF文件包含恰好1小时的数字化脑电图信号，但sub-10对应的文件时长为2小时，sub-04、sub-06、sub-07、sub-09及sub-23对应的文件时长为4小时；偶尔，记录到癫痫发作的文件时长会更短。
脑电图以256Hz的采样率录制，分辨率为16位。录制采用10-20电极系统的双香蕉双极导联布局，共18个通道。
本数据集还包含以起始和结束时间标注的癫痫发作标注信息。本数据集共包含664个EDF录音文件，其中129个文件包含至少一次癫痫发作，所有记录总计包含198次癫痫发作。

研究方法
受试者：共23名患有难治性癫痫的儿科受试者（5名男性，年龄3~22岁；17名女性，年龄1.5~19岁；1名受试者信息未标注）。
设备与采集参数：脑电图录制于波士顿儿童医院，采用国际10-20系统的脑电图电极布局。信号采样率为256样本/秒，分辨率为16位。

搜集汇总

背景与挑战

背景概述

BIDS CHB-MIT Scalp EEG Database是一个BIDS兼容版本的EEG数据集，包含来自23名难治性癫痫儿科患者的头皮EEG记录，采样率为256Hz，采用双香蕉双极蒙太奇。数据集包含664个.edf文件，其中129个文件记录有198次癫痫发作，并提供了癫痫发作的起始和停止时间注释。