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Related Concept Videos

Imaging Studies I: CT and MRI01:14

Imaging Studies I: CT and MRI

Introduction: MRI and CT scans are crucial advancements in medical imaging techniques, playing a vital role in diagnosing conditions related to the gastrointestinal (GI) system. Each scan serves distinct purposes, targets specific areas, and requires unique nursing duties.
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Computed Tomography (CT) scan:
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Imaging Studies for Cardiovascular System I:Echocardiography01:17

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Cardiac imaging studies encompass a wide range of noninvasive and minimally invasive techniques designed to visualize the heart's structure and function in detail. One such technique is echocardiography, which uses high-frequency ultrasound waves to produce detailed images of the heart, known as echocardiograms.
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Imaging Studies for Cardiovascular System II:Types of Echocardiography01:20

Imaging Studies for Cardiovascular System II:Types of Echocardiography

Echocardiography plays a role in assessing cardiac health and detecting heart conditions, with various types providing critical insights for diagnosis and treatment.
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Imaging Studies for Cardiovascular System IV: CMRI01:21

Imaging Studies for Cardiovascular System IV: CMRI

Cardiovascular magnetic resonance imaging, or CMRI, is a non-invasive diagnostic test that employs a magnetic field and radiofrequency waves to create precise images of the heart and arteries. It provides comprehensive information about cardiac anatomy, function, perfusion, and tissue characterization without ionizing radiation.IndicationsCMRI diagnoses various heart conditions, including tissue damage from heart attacks, ischemic heart disease, myocarditis, aortic issues (tears, aneurysms,...
Imaging Studies for Cardiovascular System V: CT01:28

Imaging Studies for Cardiovascular System V: CT

Cardiac computed tomography (CT) scanning is an advanced cardiac imaging technique that utilizes CT technology, with or without intravenous (IV) contrast, to produce accurate cross-sectional virtual slices of specific areas of the heart, coronary circulation, and major blood vessels such as the aorta, pulmonary veins, and arteries. The computer processes these slices to generate three-dimensional images. Multidetector CT (MDCT) is a rapid form of CT scanning that captures multiple slices...
Imaging Studies VII: Vascular Imaging01:19

Imaging Studies VII: Vascular Imaging

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Related Experiment Video

Updated: Jun 27, 2026

3D Whole-heart Myocardial Tissue Analysis
06:53

3D Whole-heart Myocardial Tissue Analysis

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Image Integration to Identify Histologic and Electroanatomic Ventricular Scar: A Clinicopathological Study Comparing

Kasun De Silva1, Timothy Campbell1, Richard G Bennett2

  • 1Department of Cardiology, Westmead Hospital, Sydney, Australia; Westmead Applied Research Centre, University of Sydney, Sydney, New South Wales, Australia.

JACC. Clinical Electrophysiology
|January 8, 2026
PubMed
Summary
This summary is machine-generated.

Cardiac magnetic resonance (CMR) image integration systems ADAS-3D and inHEART show similar accuracy in identifying ventricular tachycardia scar for ablation. While effective for endocardial and intramural scar, both systems struggle with epicardial and non-compact scar identification.

Keywords:
cardiac magnetic resonancecatheter ablationhistologyimage integrationscarventricular tachycardia

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Area of Science:

  • Cardiovascular Imaging
  • Electrophysiology
  • Medical Device Technology

Background:

  • Cardiac magnetic resonance (CMR) image integration holds promise for guiding ventricular tachycardia (VT) ablation by delineating scar tissue.
  • Limited histological data and comparative studies exist for commonly used CMR segmentation tools in VT ablation.

Purpose of the Study:

  • To validate two vendor systems, ADAS-3D and inHEART, for integrating CMR late gadolinium enhancement (LGE) with electroanatomic mapping (EAM) in VT catheter ablation.
  • To compare the accuracy of ADAS-3D and inHEART in characterizing scar distribution against histological data.

Main Methods:

  • Sheep models with induced myocardial infarction were used to create a histological scar model.
  • CMR images were segmented using ADAS-3D and inHEART, then validated against whole-heart histology for endocardial, intramural, and epicardial layers.
  • A clinical validation involved 5 human subjects undergoing VT ablation, matching critical VT sites to segmented scar regions.

Main Results:

  • Both ADAS-3D and inHEART demonstrated comparable accuracy (>75%) and moderate agreement with histology for endocardial and intramural scar.
  • Performance was poorer for epicardial layers (modest accuracy 60%-68%) and non-compact scar.
  • Critical VT sites reliably colocalized with segmented scar (88% within one layer), with over 80% of sites showing scar in multiple layers.

Conclusions:

  • ADAS-3D and inHEART offer similar scar characterization and display of scar-reentry circuit relationships for VT ablation.
  • Limitations persist in accurately identifying epicardial and non-compact scar patterns with these technologies.