Artrya vs Circle Cardiovascular Imaging (2026)
Both put coronary plaque analysis in the reading physician's hands, and both let the reader edit the result. The difference is where the software runs and what else it reads. Artrya's Salix is a cloud platform on Amazon Web Services, built around coronary CT, with the reading platform and the plaque module cleared in 2025. Circle's cvi42 runs on premises, on a hospital workstation or customer managed server, so the analysis happens without patient data leaving the institution, and it also reads cardiac MR, structural heart and electrophysiology planning studies. Circle's plaque module was cleared in October 2025 (K251027). Artrya's filing reports its test data with case counts; Circle's reports agreement figures without stating how many cases. If you want a cloud reading service with a published contract figure, start with Artrya. If patient data must stay on site, or you read cardiac MR too, start with Circle.
- You want cloud delivery: Salix runs on Amazon Web Services and returns an automated analysis in minutes for the physician to edit.
- You want counts behind the figures: K251837 tests the machine learning outputs on held out centers, with 302 series for calcium scoring and a reader study of 103 patients and eight readers.
- You want a price reference: a public ASX filing puts a five hospital deployment at US$0.6 million over five years.
- Patient data must stay inside the institution: cvi42 runs on a hospital workstation or customer managed server, and its models are locked and do not learn from customer data.
- You read more than coronary CT: cvi42 also covers cardiac MR, vascular CT, structural heart and electrophysiology planning, with StrokeSENS for acute stroke.
- You want clearances you can check: Circle's regulatory page lists its 510(k) numbers and registrations in 21 other jurisdictions.
This comparison is published by AI Health Index, an independent research platform that compares healthcare AI vendors objectively. Artrya and Circle Cardiovascular Imaging are each graded against the same capability taxonomy, from each vendor's own public materials and the regulatory record, under the AI Health Index verification standard. No vendor pays for placement, and no vendor has reviewed this page. How this evidence is graded
Plain facts
| Fact | Artrya | Circle Cardiovascular Imaging |
|---|---|---|
| Primary category | Radiology & Imaging AI | Radiology & Imaging AI |
| Founded | Not recorded | 2007 |
| Headquarters | Perth, Western Australia, Australia | Calgary, Alberta, Canada |
| Website | artrya.com | circlecvi.com |
Side by Side
Select any grade to read the note behind it.
Product updates
The latest logged changes from each vendor, newest first, each linked to its source.
Circle Cardiovascular Imaging
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Product / capability
Circle Cardiovascular Imaging released cvi42 v6.5, introducing automated phase offset correction, anti-aliasing, and pre-segmentation for 4D Flow.
Source
Each vendor in one paragraph
Written to be quoted whole. Each paragraph opens the AI Health Index profile of the vendor: what the product is, who buys it and what it does.
Artrya, listed on the ASX (AYA) and based in Perth, sells Salix, a cloud platform for reading coronary CT angiography at the point of care. Physicians start from an automated analysis, returned in minutes without an external reading team, and edit it before reporting. Machine learning handles centerline extraction, vessel labeling, lumen and wall segmentation and calcium scoring, and plaque is quantified from Hounsfield unit ranges, including low attenuation plaque, spotty calcification, positive remodeling and the napkin-ring sign.
Source: AI Health Index, September 2026
Circle Cardiovascular Imaging, based in Calgary and working in cardiovascular imaging since 2007, makes cvi42, vendor-neutral software for reading and reporting cardiac MR, cardiac and vascular CT, structural heart and electrophysiology planning, with StrokeSENS for acute stroke.
Source: AI Health Index, September 2026
Questions buyers ask
How do Artrya and Circle Cardiovascular Imaging work with the EHR?
Artrya's announcement of its Tanner Health contract says Salix Coronary Anatomy was integrated into Tanner's PACS and electronic medical record and is in clinical use across its five hospitals; Northeast Georgia Health System and Cone Health are further customers. Salix reads DICOM from any CT scanner, and new modules such as Coronary Plaque switch on inside the same interface without a separate integration project.
Circle lists partner integrations on its site. From the AI Health Index, drawn from each vendor's own published materials and the regulatory record, verified September 27, 2026. No vendor pays for placement.
How are Artrya and Circle Cardiovascular Imaging priced and sold?
Artrya's ASX announcement of its first US customer states a five year SaaS license for Salix Coronary Anatomy at a monthly subscription fee, valued at US$0.6 million over 60 months for Tanner Health's five hospitals and 30 practices, with a fee per scan added for Coronary Plaque and, once cleared, Coronary Flow. Further US customers are reported on the same subscription plus per scan structure.
Circle publishes a coding and reimbursement guide and a reimbursement calculator, and describes Medicare payment for AI plaque analysis of CCTA (US$950 under Category III code 0625T, moving to a permanent Category I code from January 2026) and higher base payments for the CCTA exam. From the AI Health Index, drawn from each vendor's own published materials and the regulatory record, verified September 27, 2026. No vendor pays for placement.
How do Artrya and Circle Cardiovascular Imaging handle patient data?
With Artrya, no retention period is given, and because the default instruction is not to put personal information into the product at all, it is unclear which document actually governs an identified coronary CT study. The same policy separately permits disclosure to a third party who may combine data to develop anonymized consumer insights, and lists advertising and marketing among its purposes, with no clinical carve out.
Circle states that image data and derived results are managed locally on a hospital workstation or customer managed server, that coronary analysis runs without sending patient data to an external reading service, and that its models are locked at integration and do not learn from customer data or from users' edits, treating each analysis in isolation. From the AI Health Index, drawn from each vendor's own published materials and the regulatory record, verified September 27, 2026. No vendor pays for placement.
Which settings and specialties do Artrya and Circle Cardiovascular Imaging cover?
For Artrya, the cleared indication covers adjunctive analysis of CCTA for patients evaluated for known or suspected coronary disease and calcium scoring on non-contrast cardiac CT, on any CT scanner. The validation in K251837 spans seven US centers, four scanner makers, adults aged 23 to 84 and routine clinician readers.
With Circle Cardiovascular Imaging, the plaque module's clearance limits it to adults' cardiac CT and its validation used US data only, and the company says not all modules are available in every region. Validation by setting for the other modules is not set out on the product pages. From the AI Health Index, drawn from each vendor's own published materials and the regulatory record, verified September 27, 2026. No vendor pays for placement.
Related comparisons
Other published head to head assessments involving these vendors or their closest peers. The full set for this category is on the Clinical Decision Support page.
Circle's K251027 summary reports segmentation and plaque volume agreement without stating the number of cases. Artrya markets Salix for rapid chest pain assessment beyond its adjunctive clearance, and its fractional flow reserve module is not yet cleared. Neither vendor publishes a per scan price.