Circle Cardiovascular Imaging vs RapidAI
A stroke center that wants ICH triage on non-contrast CT can start from Rapid ICH (K193087), alongside Rapid ASPECTS (K200760) and Rapid LVO (K200941). The vendor claims use in 2,500+ hospitals. Circle has no ICH record among its twelve openFDA records, which rules it out for that buyer.
Each has papers. StrokeSENS has three on PubMed: a 2023 comparison of multiphase CTA perfusion with CT perfusion in 121 patients, a 2022 Neuroradiology paper on LVO accuracy on CTA, and a 2026 AJNR multi-reader study of ASPECTS. Rapid's include a 2024 AJNR comparison with Viz.ai, which found CT perfusion volumes not interchangeable, and a 2022 comparison with Brainomix on ASPECTS, LVO and CTP. NeurologyLive reports the AJNR May 2026 DUEL study, retrospective, single-center and promoted by RapidAI, in which Rapid detected 98% of confirmed LVOs against 73% for Viz.ai.
A hospital with a cardiac imaging lab gets cvi42 and StrokeSENS from one vendor, while Rapid's modules add aneurysm, aortic and pulmonary embolism.
Radiology · Reviewed November 2, 2026
Circle Cardiovascular Imaging
by Circle Cardiovascular Imaging Inc. · founded 2007
cvi42 cardiac MR and CT software with FDA-cleared AI coronary plaque analysis and StrokeSENS acute stroke tools.
RapidAI
by RapidAI · founded 2017
Imaging platform for stroke, aneurysm, aortic and pulmonary embolism care, with CT perfusion, LVO and ICH modules.
When to pick each one
Circle Cardiovascular Imaging
- Multiphase CTA perfusion, 121-patient study
- cvi42 cardiac tools alongside StrokeSENS
RapidAI
- Rapid ICH, ASPECTS and LVO each have K numbers
- Aneurysm, aortic and pulmonary embolism modules
Score
Each row shows points earned of points available under the published rubric.
Circle Cardiovascular Imaging
42of 100
RapidAI
65of 100
| Dimension | Circle Cardiovascular Imaging | RapidAI | Difference |
|---|---|---|---|
| FDA clearance | 18 / 18 | 18 / 18 | 0 |
| HIPAA / SOC2 / BAA | 0 / 10 | 0 / 10 | 0 |
| EHR integrations (count) | 0 / 4.2 | 0 / 4.2 | 0 |
| Top-3 EHR coverage (Epic / Oracle / Athena) | 0 / 2.4 | 0 / 2.4 | 0 |
| Peer-reviewed papers | 0 / 18.2 | 12.7 / 18.2 | -12.7 |
| RCT / meta-analysis / systematic review | 0 / 7.8 | 3.9 / 7.8 | -3.9 |
| Funding & adoption signal | 8.4 / 12 | 8.4 / 12 | 0 |
| Pricing transparency | 2.5 / 5 | 5 / 5 | -2.5 |
| Years in market | 6 / 6 | 6 / 6 | 0 |
Scroll horizontally to see every column.
Pricing
Circle Cardiovascular Imaging
| Tier | Monthly | Annual | Notes |
|---|---|---|---|
| Enterprise | n/a | n/a | No public price. |
RapidAI
| Tier | Monthly | Annual | Notes |
|---|---|---|---|
| Plan | n/a | n/a | Enterprise. |
Evidence
Circle Cardiovascular Imaging
FDA decisions
K251027 (opens in new tab)510(k)2025-10-27
cvi42 Coronary Plaque Software Application
K250221 (opens in new tab)510(k)2025-07-01
StrokeSENS ASPECTS Software Application
K242781 (opens in new tab)510(k)2024-10-15
cvi42 Software Application
K241038 (opens in new tab)510(k)2024-06-07
Cardiac CT Function Software Application
K232661 (opens in new tab)510(k)2023-12-07
Myocardial Strain Software Application
Show 7 more
K222593 (opens in new tab)510(k)2023-01-18
TruPlan Computed Tomography Imaging Software
K213998 (opens in new tab)510(k)2022-07-28
cvi42 Auto Imaging Software Application
K212261 (opens in new tab)510(k)2021-10-14
StrokeSENS LVO
K202212 (opens in new tab)510(k)2021-02-19
TruPlan
K141480 (opens in new tab)510(k)2014-08-22
CVI42
K111373 (opens in new tab)510(k)2011-08-23
CT42 Cardiac CT Software
K082628 (opens in new tab)510(k)2008-11-20
CMR42 Cardiac MRI Imaging System
RapidAI
FDA decisions
K233512 (opens in new tab)510(k)2024-01-16
Rapid (6.0)
K213165 (opens in new tab)510(k)2022-02-08
Rapid
K200941 (opens in new tab)510(k)2020-07-09
Rapid LVO
K200760 (opens in new tab)510(k)2020-06-26
Rapid ASPECTS
K193087 (opens in new tab)510(k)2020-03-31
Rapid ICH
Show 2 more
K182130 (opens in new tab)510(k)2018-12-27
iSchemaView RAPID
K121447 (opens in new tab)510(k)2013-10-04
ISCHEMA VIEW RAPID
Peer-reviewed
4 PubMed records name RapidAI.
- A Comparison of CT Perfusion Output of RapidAI and Viz.ai Software in the Evaluation of Acute Ischemic Stroke. (opens in new tab)
- Transforming Stroke Diagnosis with Artificial Intelligence: A Scoping Review of Brainomix e-Stroke, Aidoc, RapidAI, and Viz.ai. (opens in new tab)
- Impact of RapidAI mobile application on treatment times in patients with large vessel occlusion. (opens in new tab)
Compliance and integrations
Documented from each vendor’s own pages.
| Spec | Circle Cardiovascular Imaging | RapidAI |
|---|---|---|
| Free tier | ||
| HIPAA | ||
| SOC 2 Type II | ||
| EHR integrations | Not specified | Not specified |
| Founded | 2007 | 2017 |
| HQ | CA | US |
Scroll horizontally to see both columns.
Common questions
Open the full radiology comparison
Acute-care triage, mammography screening, CCTA plaque analysis, mobile MRI. 30+ FDA-cleared platforms across stroke, oncology, cardiac. Enterprise sales only — we compared what's deployed where.