Related Experiment Video
Updated: Aug 18, 2026

Identifying Coronary Artery Calcification on Non-gated Computed Tomography Scans
Published on: August 28, 2018
Quantitative evaluation of coronary arterial stenosis using 16-slice multidetector-row computed tomography:
Minoru Yamada1, Masahiro Jinzaki, Sachio Kuribayashi
1Cardiovascular Imaging Laboratory in Research Park, Keio University School of Medicine, Tokyo, Japan. yamada@mr.med.keio.ac.jp
Objective:
The purpose of this study is to consider the possibility of quantitative evaluation of coronary arterial stenosis by using 16-slice multidetector-row computed tomography (MDCT).
Methods:
Simulated coronary arteries were prepared, which consist of 5-mm-diameter acryl tubes with contrast media (270 HU). Simulated stenoses of known density (-33 HU) were created in each coronary artery (25%, 50%, and 75%). Cardiac pulsating with 0, 50, 65, 85, and 105 beats per minute (bpm) was performed. Multiplanar reformation images for each coronary artery were created. Percent stenosis was calculated using the width middle value of boundary part of the arteries.
Results:
The stenoses were depicted in all heart rates. Average percent stenosis +/- standard deviation was 27.4 +/- 3.6%, 45.8 +/- 2.6%, and 69.4 +/- 2.7%, respectively. For each percent stenosis, there was a significant difference (P < 0.05).
Conclusion:
Sixteen-slice MDCT has a potential for noninvasive quantitative evaluation of stenosis in coronary arteries.
Related Concept Videos
Imaging Studies for Cardiovascular System V: CT
Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT
Acute Coronary Syndrome III: Diagnostic Studies
Imaging Studies for Cardiovascular System III: X-Ray
Definition and Purpose
An X-ray, or radiograph, is a non-invasive method that uses ionizing radiation to take images of internal structures. It is mainly used in cardiac imaging to examine the heart, lungs, and major blood vessels, aiming to identify abnormalities in the heart's size, shape, and position, such as heart failure, congenital defects, and vascular...
Computed Tomography
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
