CAC Software vs ZEUS System (Zio Watch)

Similar category, different focus. These tools serve overlapping but distinct needs. Comparability 60/100 Comparability is an AI-graded 0–100 score of how directly these two tools compete — higher means a more apples-to-apples comparison.
CAC Software
by 4DMedical (Imbio CAC Software)
VS
ZEUS System (Zio Watch)
by iRhythm Technologies, Inc.

AI Verdict

Tool A specializes in analyzing CT scans to quantify coronary artery calcification for cardiovascular disease risk assessment, providing structural insights. In contrast, Tool B employs a wearable device for continuous cardiac monitoring to detect and characterize arrhythmias such as Atrial Fibrillation, focusing on electrical activity. While both leverage AI in cardiology, they address distinct diagnostic needs and utilize different data sources, making them complementary rather than direct competitors.

Choose CAC Software if…

Choose Imbio's CAC Software if your primary goal is to assess a patient's risk for coronary artery disease by quantifying calcification within their coronary arteries. This tool is ideal for radiologists and cardiologists who need automated, deep-learning based analysis of non-contrast chest CT scans to generate precise Agatston scores and 3D visualizations for structural heart health assessment.

View CAC Software →

Choose ZEUS System (Zio Watch) if…

Choose iRhythm Technologies' ZEUS System (Zio Watch) if you require long-term continuous cardiac monitoring to detect and characterize cardiac arrhythmias, particularly Atrial Fibrillation. This wearable solution is best suited for physicians needing actionable insights from continuous ECG and PPG data to diagnose and manage patients with suspected or known cardiac rhythm disorders, offering up to 14 days of monitoring.

View ZEUS System (Zio Watch) →

Reviewed by Pouyan Golshani, MD — Interventional Radiologist

Quick Comparison

Feature CAC Software ZEUS System (Zio Watch)
Pricing Unknown Contact vendor
Deployment Cloud-based (SaaS), integrates with PACS Cloud-based system with a wearable device
BAA Available Yes AI-estimated Yes AI-estimated
FDA Status Cleared AI-estimated Cleared AI-estimated
HIPAA Yes AI-estimated Yes AI-estimated

Feature-by-Feature

Detail beyond the Quick Comparison summary. For pricing, deployment, BAA, FDA, and HIPAA see the Overview tab.

Feature CAC Software ZEUS System (Zio Watch)
Tool Name CAC Software ZEUS System (Zio Watch)
Company Imbio iRhythm Technologies
Primary Purpose Automated image post-processing algorithms to determine location and calculate amount of calcification within coronary arteries from non-contrast chest CT. FDA-cleared, AI-powered wearable for long-term continuous cardiac monitoring to detect and characterize Atrial Fibrillation (AFib) and other cardiac arrhythmias.
Categories Cardiology AI Cardiology AI, Wearables & Remote Monitoring (RPM)
Key Output/Analysis Agatston score, arterial age, calcified lesion mass and volume; 3D visualizations and annotated images. Advanced arrhythmia detection and analysis; detection and characterization of Atrial Fibrillation (AFib) burden; clinically actionable reports.

Videos

Demos, reviews, and walkthroughs featuring CAC Software and ZEUS System (Zio Watch).

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Frequently Asked Questions

Tool A, Imbio's Coronary Artery Calcification (CAC) software, is designed to quantify calcification within coronary arteries from non-contrast chest CT scans to support risk assessment for coronary artery disease. Tool B, iRhythm Technologies' ZEUS System (Zio Watch), provides long-term continuous cardiac monitoring for the detection and characterization of Atrial Fibrillation (AFib) and other cardiac arrhythmias, offering actionable insights for physicians.
Tool A analyzes existing non-contrast chest CT scans to identify and quantify coronary artery calcification. Tool B utilizes a wearable biosensor (Zio Watch) to continuously collect ECG and PPG data for up to 14 days.
Tool A is intended for adult patients aged 29 years and older who have undergone a non-contrast chest CT and require assessment for coronary artery disease risk. Tool B is indicated for adult patients 18 years or older (or 22 years or older, depending on the specific clearance) who may be asymptomatic or suffer from transient symptoms, or who are susceptible to developing or have been diagnosed with AFib, and require long-term continuous cardiac monitoring.
Tool A outputs an Agatston score, arterial age, calcified lesion mass, and volume, along with 3D visualizations and annotated images. Tool B provides advanced arrhythmia detection and characterization, delivering clinically actionable reports on AFib burden and other cardiac arrhythmias.
Tool A integrates into existing DICOM viewing workflows, providing automated image post-processing and returning results directly to PACS. Tool B offers a cloud-based ZioSuite portal and a provider mobile app for report interpretation and patient management, with seamless EHR integration.
Tool A is primarily intended for use by radiologists and cardiologists. Tool B is designed for cardiologists, family medicine practitioners, and internal medicine physicians.

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Backers

Who funded each tool's parent company.

ZEUS System (Zio Watch)

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