Medical Imaging PACS with OHIF Viewer

Enterprise PACS with Zero-Footprint OHIF Web Viewer Integration

WeHealth's PACS solution combines enterprise-grade medical imaging archiving with the open-source OHIF Viewer, delivering a modern, web-based diagnostic viewing experience that works anywhere, on any device, without software installation.

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What is a PACS?

Picture Archiving and Communication System (PACS) is a medical imaging technology that provides economical storage, retrieval, management, distribution, and presentation of medical images. PACS eliminates the need to manually file, retrieve, and transport film jackets.

WeHealth's PACS is built on industry-standard DICOM protocols and integrates seamlessly with modalities like CT, MRI, X-Ray, Ultrasound, and more. Our solution is designed specifically for Canadian healthcare institutions with features for compliance, bilingual support, and integration with existing HIS/RIS systems.

  • DICOM 3.0 compliant storage and retrieval
  • HL7 integration with RIS and HIS systems
  • Cloud and on-premise deployment options
  • Disaster recovery and backup solutions
PACS System

OHIF Viewer Integration

Zero-footprint web-based medical imaging viewer built on open standards

What is OHIF Viewer?

The Open Health Imaging Foundation (OHIF) Viewer is an open-source, web-based medical imaging platform. It's a zero-footprint viewer, meaning no software installation is required—clinicians access studies directly through their web browser. OHIF is actively maintained by a global community and is used by leading healthcare institutions worldwide.

WeHealth has deep expertise integrating OHIF Viewer with our PACS solution, providing a modern, standards-based viewing experience that radiologists and clinicians love.

Zero-Footprint Access

Access medical images from any device with a web browser. No plugins, no installations, no updates to manage. Works on Windows, macOS, Linux, tablets, and even mobile devices.

Open Source & Extensible

Built on open standards (DICOM, DICOMweb). Fully extensible architecture allows custom plugins, measurement tools, and AI integrations. No vendor lock-in.

High Performance

Fast image loading with progressive streaming. GPU-accelerated rendering for smooth pan, zoom, and window/level adjustments. Handles large studies (500+ images) with ease.

Advanced Measurement Tools

Built-in annotation and measurement tools: length, angle, ellipse, rectangle, freehand ROI. SUV calculations for PET studies. Bidirectional measurements for oncology.

Multi-Modality Support

Display all DICOM modalities: CT, MR, PT, CR, DX, US, MG, and more. MPR (Multi-Planar Reconstruction) for 3D datasets. Fusion imaging for PET/CT studies.

AI Integration Ready

OHIF supports AI algorithm integration via DICOM SEG and SR. Display AI-generated segmentations, annotations, and structured reports alongside original images.

WeHealth PACS Core Features

Enterprise imaging platform designed for Canadian healthcare

Scalable Storage Architecture

Tiered storage with automatic lifecycle management. Recent studies on high-speed SSD, older studies migrate to cost-effective object storage. Supports petabyte-scale deployments.

DICOM & DICOMweb

Full DICOM 3.0 compliance (C-STORE, C-FIND, C-MOVE, C-GET). Modern DICOMweb APIs (WADO-RS, QIDO-RS, STOW-RS) for web-based viewers and AI platforms.

Modality Worklist (MWL)

Integrated DICOM worklist provider eliminates manual entry errors. HL7 ADT and ORM messages from RIS automatically populate worklists on modalities.

RIS/HIS Integration

Bidirectional HL7 interfaces with radiology information systems and hospital information systems. Automatic study routing based on procedure codes, modality, or department.

Security & Compliance

DICOM TLS encryption. Role-based access control. Audit logging (DICOM Audit Trail). PIPEDA and provincial privacy law compliance. PHI de-identification tools.

FHIR ImagingStudy

Expose DICOM studies as FHIR ImagingStudy resources. Enables integration with FHIR-based EHR systems, patient portals, and clinical decision support systems.

Clinical Workflows Enabled

Real-world use cases in Canadian radiology departments

1

Primary Diagnostic Reading

Radiologists use OHIF Viewer for primary interpretation of CT, MR, and other cross-sectional imaging. Multi-monitor support, hanging protocols, and advanced measurement tools provide a diagnostic-grade reading experience.

2

Referring Physician Access

Clinicians access imaging from their EHR via SMART on FHIR launch or web portal. Zero-footprint viewer means no software deployment to hundreds of workstations—just a browser.

3

Multi-Site Collaboration

Share studies between institutions using DICOM Q/R or DICOMweb. Consulting radiologists review cases remotely. Community hospitals access tertiary center expertise without physical film transfer.

4

Patient Access Portal

Patients view their imaging through a secure web portal. Reduces CD burning costs. Improves patient engagement. Annotated reports with linked images for better understanding.

OHIF Viewer Advanced Capabilities

Imaging Features

  • Window/Level - Preset and custom W/L adjustments
  • Pan & Zoom - Smooth navigation with mouse or touch
  • Stack Scroll - Cine mode for dynamic studies
  • Magnifying Glass - Pixel-level examination
  • Invert - Grayscale inversion for better visualization
  • Rotate & Flip - Image orientation adjustments
  • Reference Lines - Cross-reference between series
  • Synchronization - Link scroll/zoom across viewports

Advanced Tools

  • MPR (Multi-Planar Reconstruction) - Axial, sagittal, coronal views
  • 3D Volume Rendering - VRT for CT angiography
  • Maximum Intensity Projection (MIP) - Vessel visualization
  • PET/CT Fusion - SUV calculations and fusion overlays
  • Hanging Protocols - Customizable series layout rules
  • Key Images - Mark and export significant findings
  • DICOM SR Display - Structured report rendering
  • Viewport Presets - Save custom layouts

Flexible Deployment Options

Deploy the way that works for your imaging center

Cloud PACS

Fully managed cloud deployment: WeHealth hosts both PACS and OHIF Viewer in Canadian data centers. Zero on-premise infrastructure. Pay-per-study pricing. 99.9% uptime SLA.

  • No capital expenditure
  • Automatic backups and DR
  • Elastic scaling for peak loads
  • 24/7 monitoring and support

On-Premise PACS

Full control deployment: Install PACS and OHIF on your infrastructure. HIPAA/PIPEDA compliant. Integrate with existing network. We provide hardware specs, installation, and training.

  • Complete data sovereignty
  • Integration with existing IT
  • No internet dependency
  • One-time license fee

Hybrid Cloud

Best of both worlds: Store recent studies on-premise for low-latency access. Automatically tier older studies to secure cloud storage. OHIF viewers at both locations.

  • Hot data local, cold data cloud
  • Optimized storage costs
  • Disaster recovery included
  • Seamless archive migration

Benefits of WeHealth PACS with OHIF

Lower Total Cost of Ownership

OHIF is open source—no per-seat licensing fees. No thick client deployments or VDI infrastructure. Reduce IT support costs with zero-footprint architecture. Save on film and CD distribution.

Rapid Deployment

Cloud PACS deploys in days, not months. OHIF viewers accessible immediately via web browser. No workstation provisioning delays. Start archiving studies on day one.

Improved Clinician Satisfaction

Modern web interface familiar to clinicians. Access from any device, anywhere. Responsive performance. Intuitive tools reduce training time. Happier radiologists and referring physicians.

Future-Proof Technology

OHIF is actively developed by global community. Regular updates with new features and modality support. DICOMweb standard ensures long-term viability. No vendor lock-in concerns.

Seamless Integration

HL7 interfaces with RIS, HIS, EMR. FHIR ImagingStudy resources for EHR integration. RESTful APIs for third-party applications. SMART on FHIR launch from EHR context.

AI-Ready Platform

OHIF supports AI algorithm integration via DICOM SEG/SR. Display AI-generated findings alongside images. Enable CAD (computer-aided detection) workflows. Prepare for radiology's AI future.

Technical Specifications

DICOM Standards

  • DICOM 3.0 conformance (all IODs)
  • DICOM services: C-STORE, C-FIND, C-MOVE, C-GET, C-ECHO
  • DICOM Modality Worklist (MWL)
  • DICOM Storage Commitment (SC)
  • DICOM Query/Retrieve (Q/R)
  • DICOM Print (DICOM Print SCU/SCP)
  • DICOM TLS encryption support

DICOMweb APIs

  • WADO-RS (Web Access to DICOM Objects)
  • QIDO-RS (Query based on ID for DICOM Objects)
  • STOW-RS (Store Over the Web)
  • WADO-URI (legacy WADO support)
  • RESTful API with OAuth 2.0 authentication
  • JSON and XML metadata formats
  • CORS support for web applications

Modality Support

  • CT (Computed Tomography)
  • MR (Magnetic Resonance)
  • PT (Positron Emission Tomography)
  • CR/DX (Computed/Digital Radiography)
  • US (Ultrasound)
  • MG (Mammography)
  • NM (Nuclear Medicine)
  • XA (X-Ray Angiography)
  • All other DICOM modalities

OHIF Technology Stack

  • React 18 + TypeScript
  • Cornerstone3D (image rendering)
  • DICOMweb client library
  • WebGL acceleration
  • Progressive Web App (PWA)
  • WCAG 2.1 AA accessibility
  • Mobile responsive design

Ready to Modernize Your Medical Imaging?

Discover how WeHealth PACS with OHIF Viewer transforms radiology workflows

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