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Updated: Jun 26, 2025

Author Spotlight: Advancing Cardiovascular Imaging - Introducing the Spatially Weighted Calcium Score for Early Disease Detection

Author Spotlight: Advancing Cardiovascular Imaging - Introducing the Spatially Weighted Calcium Score for Early Disease Detection

Published on: September 22, 2023

Carotid artery calcium score: Definition, classification, application, and limits.

Luca Saba¹, John C Benson², Roberta Scicolone¹

¹Department of Radiology, University of Cagliari, Italy.

The Neuroradiology Journal

|May 8, 2024

Summary

A new Carotid Artery Calcium Score (CACS) quantifies carotid artery calcification using Hounsfield Units. This method shows potential for risk stratification of cerebrovascular events.

Keywords:

CTA Calcium carotid plaque

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Area of Science:

Medical Imaging
Cardiovascular Research
Neurology

Background:

Atherosclerosis in carotid arteries is a significant risk factor for cerebrovascular events.
Quantifying carotid artery calcification can aid in risk assessment.
Existing methods may not fully capture the extent of calcification.

Purpose of the Study:

To introduce and define a novel metric method for quantifying carotid artery calcification.
To present the Carotid Artery Calcium Score (CACS) as a quantitative measure.
To evaluate the feasibility and initial findings of the CACS method.

Main Methods:

The Carotid Artery Calcium Score (CACS) is calculated by summing Hounsfield Unit (HU) values (≥130 HU) of voxels within the carotid artery.
The total weight value is determined by multiplying the sum of HU values by a conversion factor and dividing by a weighting factor.
The Volume of Interest (VOI) is extracted for analysis.

Main Results:

The CACS was calculated for 235 carotid arteries in 131 subjects (mean age 72.7 years).
A statistically significant correlation was found between CACS in right and left carotid plaques (rho=0.663, p=0.0001).
Significant correlation observed between age and CACS (rho=0.244, p=0.005), with no significant gender difference (p=0.148).

Conclusions:

The CACS is an easily applicable method that integrates both volume and degree of calcification.
Further validation is needed to confirm its utility in risk stratification for cerebrovascular events.
Additional studies are required to determine the prognostic value of carotid calcium quantification.