This dataset contains 174 episodes (2 minutes intervals) of Multichannel Intraluminal Impedance data belonging to 26 individuals. The dataset includes three variables, "IMPEDANCE", "BASE" and, "FLAG_GER" of the same size r*c.
IMPEDANCE: includes impedance data of the 6 different channels for the 174 episodes of 2 minutes, with a sampling frequency of 50 HZ.
BASE: includes baseline impedance data of the 6 different channels for the 174 episodes of 2 minutes duration with a sampling frequency of 50 HZ.
FLAG_GER: determines ground-truth areas of the 6 different channels for the 174 episodes of 2 minutes duration with a sampling frequency of 50 HZ.
Multichannel Intraluminal Impedance-pH (MII-pH) monitoring is designed to detect intraluminal bolus movement without the use of radiation and allows for detection of Gastroesophageal reflux (GER) which is the key concept for the diagnosis of Gastroesophageal Reflux Disease (GERD).
The occurrence of all types of GERs can be determined by investigating the MII signal, independently of pH. Driven by this information, for simplicity and also to prevent multi−modal processing, pH data was ignored in our investigation for providing the MII database. In this regard, the data vector provided here is of a unit type of impedance.
In the absence of swallow or GER within the esophagus, the impedance is identified by the electrical conductivity of the inner wall and it is relatively stable and is known as baseline impedance value.
Please cite the following paper to use the data:
IEEE J Biomed Health Inform. 2021 Apr 28;PP. doi: 10.1109/JBHI.2021.3076212. Epub ahead of print. PMID: 33909574.