Bunkerhill Health vs Circle Cardiovascular Imaging
Circle's cvi42 is analysis software for the cardiac imaging lab: cardiac MR and CT, strain, mapping, plaque and calcium quantification. Its openFDA record runs to 12 entries under two applicant names, from CMR42 in 2008 to the cvi42 Coronary Plaque application (K251027) in October 2025. The vendor lists ISO 13485:2016 and MDSAP certificates, plus integrated solutions with GE Healthcare and Siemens Healthineers. It fits a cardiac MR lab or a CT lab that reads and measures its own studies.
Bunkerhill sells an agent platform to health systems and holds nine openFDA clearances: iCAC (K230223), CAC (gated, K240369), AVC (K243229), BMD (K242295), aortic quantification (K243779), ECG-EF (K250649), MAC (K250662) and contrast versions of CAC and AVC from March 2026. Its homepage lists heart failure follow-up for patients with LVEF 40% or below.
Cardiology leaders at a health system comparing the two meet at coronary calcium, which each product list covers. Beyond that the products serve different desks, Circle the lab that measures and Bunkerhill the system that wants algorithm results to drive follow-up work.
Radiology · Reviewed November 2, 2026

Bunkerhill Health
by Bunkerhill Health
AI agent platform for health systems covering referrals, prior auth, care coordination and imaging, built on nine FDA-cleared imaging algorithms.

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.
When to pick each one
Bunkerhill Health
- Nine openFDA clearances, CAC, AVC, MAC and ECG-EF
- Heart failure follow-up agent, LVEF 40% or below
Circle Cardiovascular Imaging
- cvi42 Coronary Plaque, K251027, October 2025
- Cardiac MR strain and mapping software
- ISO 13485:2016 and MDSAP certificates
Score
Each row shows points earned of points available under the published rubric.
Bunkerhill Health
40of 100
Circle Cardiovascular Imaging
42of 100
| Dimension | Bunkerhill Health | Circle Cardiovascular Imaging | Difference |
|---|---|---|---|
| FDA clearance | 18 / 18 | 18 / 18 | 0 |
| HIPAA / SOC2 / BAA | 10 / 10 | 0 / 10 | +10 |
| 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 | 0 / 18.2 | 0 |
| RCT / meta-analysis / systematic review | 0 / 7.8 | 0 / 7.8 | 0 |
| Funding & adoption signal | 3 / 12 | 8.4 / 12 | -5.4 |
| Pricing transparency | 2.5 / 5 | 2.5 / 5 | 0 |
| Years in market | 0 / 6 | 6 / 6 | -6 |
Scroll horizontally to see every column.
Pricing
Bunkerhill Health
| Tier | Monthly | Annual | Notes |
|---|---|---|---|
| Quote only | n/a | n/a | No public price. The site offers a demo request only. |
Circle Cardiovascular Imaging
| Tier | Monthly | Annual | Notes |
|---|---|---|---|
| Enterprise | n/a | n/a | No public price. |
Evidence
Bunkerhill Health
FDA decisions
K260167 (opens in new tab)510(k)2026-03-06
Bunkerhill Contrast AVC
K260166 (opens in new tab)510(k)2026-03-06
Bunkerhill Contrast CAC
K250662 (opens in new tab)510(k)2025-10-03
Bunkerhill MAC
K250649 (opens in new tab)510(k)2025-09-19
Bunkerhill ECG-EF
K243779 (opens in new tab)510(k)2025-07-01
Bunkerhill Abdominal Aortic Quantification (AAQ)
Show 4 more
K242295 (opens in new tab)510(k)2025-04-08
BunkerHill BMD
K243229 (opens in new tab)510(k)2025-01-27
Bunkerhill AVC
K240369 (opens in new tab)510(k)2024-09-27
CAC (gated) Algorithm
K230223 (opens in new tab)510(k)2023-04-25
iCAC Device
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
Compliance and integrations
Documented from each vendor’s own pages.
| Spec | Bunkerhill Health | Circle Cardiovascular Imaging |
|---|---|---|
| Free tier | ||
| HIPAA | ||
| SOC 2 Type II | ||
| EHR integrations | Not specified | Not specified |
| Founded | n/a | 2007 |
| HQ | n/a | CA |
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.
