The scanner gets most of the attention when a practice starts a cardiac PET/CT program. The processing software deserves just as much. It turns raw images into perfusion scores, ejection fraction and myocardial blood flow, and it decides how quickly a reading physician can open a study, sign it, and send the report back.
Four programs come up again and again in the medical literature and on the vendor platforms that cardiac PET sites actually use. Below, we rank them on the three things that matter most to a growing program: ease of use, moving data from the scanner to a cloud server, and remote login so physicians can view and dictate from anywhere.
The four programs
Emory Cardiac Toolbox (Syntermed)
Developed at Emory University and sold by Syntermed, the Toolbox quantifies perfusion, function and dyssynchrony for both SPECT and PET, and its FlowTool module calculates absolute blood flow and flow reserve. SmartReport turns the quantitative scores into draft report text. Its standout feature is Syntermed Live, a cloud-based remote reading and reporting service in use since 2007 that physicians reach over ordinary internet, with no hospital VPN required.
Corridor4DM (INVIA)
Built on the University of Michigan’s methods, 4DM is probably the most widely distributed package. INVIA lists more than 25 partners, including GE HealthCare, Siemens Healthineers, United Imaging, Spectrum Dynamics, Philips, Sectra, Merge, Fujifilm and MIM. It covers perfusion, function and myocardial flow reserve with largely automated workflows. Cloud and remote access usually come through a partner, such as Oracle Health’s SkyVue (running in the Oracle Cloud) or ScImage’s web-based PICOM365. A standalone “4DM Personal” version also runs on a Windows laptop.
MIMcardiac (MIM Software, a GE HealthCare company)
MIMcardiac handles cardiac PET and SPECT perfusion, function and viability, with automatic left-ventricle segmentation and stress/rest alignment. GE HealthCare acquired MIM Software in 2024 and launched the vendor-neutral MIM Encore platform in 2025. MIM can be deployed in the cloud or on premises, and its Zero Footprint viewer runs in a web browser without plug-ins or a VPN.
Cedars-Sinai Cardiac Suite (QPS, QGS, QPET)
Cedars-Sinai’s software is widely regarded as a reference standard for quantitative nuclear cardiology. It has been licensed to GE, Philips and Siemens for more than 20 years, so many readers already know it. QPET analyzes static and gated PET, and its PET Kinetics module calculates myocardial blood flow and coronary flow reserve. The vendor does not advertise its own cloud or remote reading service. Remote access usually depends on the workstation or PACS it runs inside.
How they rank
We scored each program from 1 (weakest) to 5 (strongest) on each criterion, based on what the vendors and their partners publicly describe.
| Rank | Software | Ease of use | Scanner-to-cloud | Remote read & dictate | Total |
|---|---|---|---|---|---|
| 1 | Emory Cardiac Toolbox + Syntermed Live | 4 | 5 | 5 | 14 |
| 2 | Corridor4DM (INVIA) | 5 | 4 | 4 | 13 |
| 3 | MIMcardiac / MIM Encore | 4 | 4 | 4 | 12 |
| 4 | Cedars-Sinai Cardiac Suite | 5 | 2 | 2 | 9 |
- Emory Cardiac Toolbox ranks first because it comes with its own cloud reading service and doesn’t depend on a third party for remote access.
- Corridor4DM is the easiest to fit into whatever a site already owns. Its cloud and remote options are strong but come through partners.
- MIMcardiac offers the most modern browser-based access. It is a good fit for sites already using MIM or GE HealthCare imaging IT.
- Cedars-Sinai Cardiac Suite is excellent for quantitation but ranks last here only because cloud transfer and remote login rely on the host platform.
The best software is the one your reading physicians will actually open from home at 9 p.m., and that your technologists can send to without a phone call.
Getting studies from the scanner to the cloud
Every program here receives images by standard DICOM transfer. The practical questions are what sits between the scanner and the cloud, and what gets sent:
- A secure gateway. Most cloud services use a small on-site router or gateway that receives studies from the scanner and forwards them encrypted to the cloud. For mobile units, confirm how that gateway connects at each host site.
- The right series. Blood flow measurement needs the dynamic frames and the CT attenuation map, not just the reconstructed summed images. Missing series are a common cause of studies that can’t be processed.
- Tracer support. Confirm the version you buy supports your tracer, whether that’s rubidium-82, N-13 ammonia or F-18 flurpiridaz (Flyrcado).
Remote login and dictation
Physicians want to log in from any computer, review perfusion and flow, and sign a report in one sitting. Ask each vendor whether access requires a VPN or a full workstation install, whether quantitative results flow straight into the report (DICOM structured reporting or built-in templates), and whether the system works with your speech-recognition and reporting tools. A browser-based viewer with automatic report drafts saves the most physician time.
Choosing for your program
Start with what your scanner vendor and PACS already include. Many sites can license 4DM, QPET or the Emory Toolbox on equipment they already have. If your physicians read from several locations, or you run a mobile service across multiple host sites, put cloud transfer and remote login at the top of the list. Always ask for a trial using your own studies before you sign.
Rankings reflect Turtle Strategies’ assessment of publicly available vendor and partner information as of October 2026. No public market-share data exists for these products, and features, pricing and partnerships change often. Confirm current capabilities with each vendor.