One platform or two systems joined together: what actually changes
Many imaging centres in India run a RIS and a PACS from different vendors, connected by an interface. Others run both on one platform. Both can work. The difference shows up at the joins: patient IDs, priors, logins, and who you call when something breaks. This page sets out the trade-offs plainly, including the cases where keeping separate systems is the better choice.
The problem with the joins
- The same patient, twice. Registration happens in the RIS, but the PACS holds its own patient record. When the interface drops a message or the technician types the name on the console, the two drift apart and priors stop matching.
- Three windows per study. The radiologist opens images in the PACS, writes in a reporting tool or Word, and marks the report final in the RIS.
- Two vendors, one problem. When a report doesn't reach the patient, each vendor points to the other's side of the interface.
- Upgrades break things. One side updates and the interface needs fixing again.
Side by side
| Unified RIS-PACS | Separate RIS and PACS | |
|---|---|---|
| Logins | One login for registration, images, reporting and sign-off. | Usually two or more; single sign-on is possible but has to be set up and maintained. |
| Patient ID | One patient record shared by scheduling, images and reports. | Two records kept in step by HL7 messages; mismatches need manual reconciliation. |
| Priors | Matched on the same patient record, across all centres on the platform. | Depend on IDs matching across both systems; fetching from a different branch's PACS is extra work. |
| Billing | Part of the same cycle, so what was billed and what was scanned and reported line up. | Billing often in the RIS or a third package; reconciliation is a separate task. |
| Report delivery | Signed report goes out by email, WhatsApp or patient portal from the same system. | Depends on which system holds the final report and whether it has delivery built in. |
| Integrations | One HL7/FHIR connection to your HIS, EMR or LIS. | RIS-to-PACS interface plus each system's own links to the HIS. More interfaces to monitor. |
| Support contracts | One vendor, one contract, one number to call. | Two contracts, two AMCs, and a grey zone at the interface. |
| Upgrades | Released and tested together. | Each vendor upgrades on its own schedule; the interface must be retested. |
| Choice of components | You take the vendor's RIS and PACS together. | You can pick the best-fit product for each and replace one without the other. |
| When it makes sense | Single centres and chains that want one workflow from registration to report, and anyone opening new sites. | A hospital whose HIS already does radiology ordering and billing well; a site with a long-term PACS contract; a large enterprise with an integration team and an enterprise imaging archive. |
Separate systems are not wrong. If your HIS already handles radiology orders and billing well, and your PACS is under a long contract, connecting them properly through HL7 and IHE profiles may be the sensible path. The cost is the interfaces, and someone has to own them.
How SOMATIQ handles it
- Unified RIS-PACS with multi-site support. Registration, scheduling, billing, acquisition, reporting and report delivery on one platform, with one login across centres.
- HL7/FHIR integration. Where a hospital HIS, EMR or LIS stays in place, SOMATIQ connects to it, so you can take the unified workflow inside radiology without replacing the HIS.
- Vendor neutral archive. Images are stored in standard DICOM, so they stay readable by other systems.
- Report Finder. Legacy reports from your old RIS can be migrated in and searched, so history comes with you.
- Hybrid or cloud-only deployment. An on-site PACS with cloud access for medium and large centres, or cloud-only with a lightweight pusher app for small centres.
What one system changed for Prima
SOMATIQ is deployed across 130+ imaging centres in 3 countries. Prima Diagnostics in Bengaluru moved all eight of its centres onto one system, from registration to signed report, and reports that its radiologists now report about 30% faster (Digital Health News).
Questions buyers ask
Can we keep our HIS and still use a unified RIS-PACS?
Yes. The HIS sends orders and receives signed reports over HL7 or FHIR, and radiology runs on one platform in between.
Is a unified system a lock-in risk?
Ask any vendor, including us, how you get your data out. Images in a vendor neutral DICOM archive and reports in exportable form are what you need.
Can we move to unified in stages?
Often, yes. Whether you start with reporting, the archive or the front desk depends on your current systems and contracts; we'll map it with you.
Does single sign-on close the gap?
It removes the extra password. It doesn't merge patient records, priors or billing.
Read more
Ready to see your workflow on one platform?
We will walk you through the whole workflow, from registration to signed report.