ORIGINAL ARTICLES   

International Angiology 2014 August;33(4):392-403

Copyright © 2014 EDIZIONI MINERVA MEDICA

language: English

Link between automated coronary calcium volumes from intravascular ultrasound to automated carotid IMT from B-mode ultrasound in coronary artery disease population

Araki T. ¹, Ikeda N. ², Molinari F. ³, Dey N. ⁴, Acharjee S. ⁴, Saba L. ⁵, Suri J. S. ^{4, 6, 7} ✉

¹ Division of Cardiovascular Medicine, Toho University Ohashi Medical Center, Ohashi Meguro-ku, Tokyo, Japan; ² Division of Cardiovascular Medicine, National Centre for Global Health and Medicine (NCGM), Toyama Shinjuku-ku, Tokyo, Japan; ³ Biolab, Department of Electronics and Telecommunications, Politecnico di Torino, Torino, Italy; ⁴ Point of Care Devices, Global Biomedical Technologies, Inc., Roseville, CA, USA; ⁵ Department of Imaging Sciences, Azienda Ospedaliero Universitaria di Cagliari, Polo di Monserrato, Monserrato, Cagliari, Italy; ⁶ Diagnostic and Monitoring Division, AtheroPointTM LLC, Roseville, CA, USA; ⁷ Electrical Engineering Department, Jdaho State University, ID, USA

AIM: Establishing relationship between coronary calcium volumes from Intravascular Ultrasound (IVUS) and automated carotid intima-media thickness (cIMT) helps in understanding the genetic nature of atherosclerosis disease. In this research, we have quantified the detected calcium from IVUS video frames and associated a relationship between coronary calcium volumes computed and automated cIMT from B-mode ultrasound.
METHODS: Coronary calcium volume is computed from IVUS and auto cIMTs are computed using B-mode ultrasound. An automated computer based application is developed and tested on 100 patient volumes (an average of 2549 frames per volume) to calculate lesion area and normalized coronary calcium volume. We use an integrated approach for volume computation which is based on lesion area per frame. We have measured the normalized volume from the calcium detected video frames using proposed integration method. The cIMT of 100 carotids were measured with novel and dedicated automated software analysis (AtheroEdge™ from AtheroPoint™ LLC, Roseville, CA, USA).
RESULTS: The computer-based coronary calcium volume (from IVUS) showed a correlation coefficient with respect to cIMT for left and right carotids as 9.1% and 13.9%, respectively.
CONCLUSION: Coronary calcium volume computed from IVUS and auto cIMT are moderately correlated. The association between auto cIMT (right side) vs. computer-based coronary calcium volume (IVUS) is stronger than the association between auto cIMT (left side) vs. computer-based coronary calcium volume.