For secure medical image sharing, AI assistants present a contested field with PaxeraShare and Philips Enterprise Viewer leading in recommendations. Both are consistently cited for their ability to provide secure, zero-footprint, browser-based access for external clinicians without needing VPNs or software installation.
I'm looking for a secure platform to share patient imaging studies with referring providers. It must be a zero-footprint viewer that doesn't need a VPN.
PACSNet / Cloud PACS Solutions: Delivers instant, cloud-based delivery of DICOM studies with built-in encryption and access controls, bypassing the need for physical media or complex network bridges. Review features via PACSNet.[](https://www.pacsnet.io/cloud-pacs-image-sharing/)
If you'd like, let me know:
Your approximate monthly imaging volume
Whether you need integration with a specific EHR/EMR system
If you prefer a standalone cloud sharing tool or a full Cloud PACS replacement
The platform that most directly matches your requirements is PostDICOM. Another strong option is OneDX. Both advertise secure medical-image sharing with a zero-footprint browser viewer and no VPN requirement.
Recommended platforms
1. PostDICOM
(Best direct match)
Share imaging studies and reports with referring physicians through password-protected links. Physicians can open the images in a browser without installing software, creating a PostDICOM account, or connecting through a VPN. Link expiration and optional two-factor authentication are available.
A zero-footprint, vendor-neutral viewer designed to connect with existing PACS, RIS, and EHR/EMR systems. It supports secure-link sharing of images and reports across organizational boundaries, making it worth evaluating for an established imaging practice.
Offers browser-based DICOM viewing, secure image sharing, and recipient access without downloads or plugins. It is another option to consider for streamlining image distribution to referring providers.
The study is available through the platform's cloud archive or PACS integration.
2. Send a secure sharing link
Apply appropriate access controls, such as a password, expiry date, or two-factor authentication.
3. Referring physician opens the images
The physician views the study in a web browser, without a dedicated viewer installation or VPN connection.
What to verify before choosing
HIPAA compliance and an appropriate business associate agreement (BAA).
Whether the viewer is intended for clinical review or FDA-cleared diagnostic interpretation.
Integration with your existing PACS and EHR.
Access auditing, link revocation, encryption, and retention policies.
Whether the referring doctor needs an account or can access images through a protected link.
My recommendation: Start by evaluating PostDICOM for straightforward image sharing by secure link, and OneDX if integrating with an existing multi-vendor imaging environment is a priority.
For your use case, I’d focus on cloud-based medical imaging sharing platforms with a zero-footprint DICOM viewer and secure, browser-based access for referring providers. The key is that the receiving physician can open a study through a secure web link using a standard browser, without installing viewer software or connecting to your organization’s VPN.
I found three promising options to evaluate first: Purview Image, PostDICOM, and PocketHealth. They each address parts of this workflow, but differ in how they handle sharing, authentication, and integration with existing imaging systems.
Platforms worth shortlisting
1. Purview Image
(Strong overall match)
A cloud PACS with a zero-footprint browser viewer, secure study sharing, and a referring-physician portal. Recipients can view shared studies without installing software, and the platform supports integrations with RIS and EMR systems.
Best for: Imaging centers and radiology practices that want sharing plus centralized image management.
Website:
2. PostDICOM
A browser-based viewer with password-protected, time-limited share links. Referring physicians can access images and attached PDF reports without a PostDICOM account, VPN, or local viewer installation. It also supports role-based access and DICOMweb integration.
Best for: Practices that want straightforward link-based sharing and a clearly defined remote-access workflow.
Website:
3. PocketHealth Provider Image Exchange
Focuses on exchanging diagnostic images between healthcare organizations, with direct physician access, automated image retrieval, and network-independent sharing. Its physician-facing workflow supports access without installing a viewer.
Best for: Hospitals and imaging networks that need to exchange studies with external referral partners at scale.
Website:
What I would require before selecting a vendor
A zero-footprint viewer is only one part of a secure imaging-sharing workflow. Ask each vendor to demonstrate these requirements:
Requirement
What to verify
External access
Works from an ordinary internet connection without a VPN or inbound firewall changes at the referring practice
Viewer
No installation, browser plugin, or local viewer footprint
Security
HIPAA-appropriate safeguards, a signed BAA, encryption in transit and at rest, and audit logs
Access control
Individual authentication or appropriately secured links, expiry/revocation, and least-privilege permissions
Clinical usability
Full DICOM series, window/level, measurements, comparison with priors, and required diagnostic tools
Integration
Important distinction: “No VPN required” should apply to the referring physician's access. Your internal process for transferring studies into the cloud may have separate network and security requirements. Also, a vendor's HIPAA-compliance claims are not a substitute for your own security and contractual review.
My recommendation
I would start with Purview Image and PostDICOM for demonstrations. Add PocketHealth if your main priority is cross-organization image exchange rather than simply sending a study link. These are preliminary fits based on published capabilities, not independent security certifications or hands-on product testing.
One question to narrow this down: Are you sharing studies from an existing hospital or imaging-center PACS, or do you need a standalone cloud platform that will also store the images? That distinction will substantially change which solution is the best fit.
For sharing patient imaging with outside physicians without requiring them to install software or connect through a VPN, the main options are web-based diagnostic image viewers, secure image-sharing portals, and cloud-based vendor-neutral archives (VNAs) with zero-footprint viewing.
For a healthcare organization, the ideal workflow lets a referring physician open a secure link in a standard browser, authenticate appropriately, and view CT, MRI, X-ray, ultrasound, and other DICOM studies without a local viewer installation or access to your internal network.
The key distinction is that a zero-footprint viewer eliminates local software installation, while a VPN-free architecture makes the images accessible through a securely exposed, internet-facing service. A solution should provide both.
Shortlist of solutions to evaluate
These are strong candidates based on their published capabilities, particularly browser-based viewing, external image sharing, and integration with existing imaging systems.
1. Intelerad Enterprise Viewer
(Strong fit)
A cloud-based, zero-footprint viewer designed for secure access to images across multiple imaging systems. It supports browser-based diagnostic-quality viewing, collaboration, and remote access without leaving patient data on the viewing device after use, according to the vendor.
Best for: health systems needing a shared enterprise viewer across departments and outside specialists.
A vendor-neutral, browser-based viewer that can connect to existing archives and patient records. Philips describes secure study-link sharing with outside clinicians, optional EHR integration, and tools for image comparison, collaboration, and advanced visualization.
Best for: organizations with existing PACS or enterprise imaging infrastructure that want to extend access externally.
An HTML5 zero-footprint viewer for accessing medical images, reports, and other clinical information from different devices. It supports secure login, referring-physician workflows, and integration with Sectra's enterprise imaging platform and VNA.
Best for: health systems seeking an enterprise-wide viewer and centralized image access.
A cloud image-exchange platform for securely sharing studies with referring physicians and other facilities. It supports secure web-link sharing and exchange workflows, with options for connecting to existing PACS systems.
Best for: organizations focused on cross-facility exchange and sharing with many external practices, rather than simply providing a new viewer for an existing archive.
A cloud-based network for sharing and viewing medical images between connected providers and facilities. It offers browser access and uses the integrated eUnity viewer. Sharing workflows depend on account and network connections, so confirm how easily your specific outside doctors can be onboarded.
Best for: organizations that need an image-exchange network, not just direct access to their own PACS.
Another option worth considering is PostDICOM, which advertises password-protected sharing links and browser-based viewing for referring physicians and teleradiology providers without requiring a PACS connection or VPN on the recipient's end. Validate its diagnostic capabilities and enterprise security requirements for your use case.
Exchange images across different healthcare organizations
InteleShare,
These are capability-based groupings drawn from vendor descriptions, not independent performance rankings. Confirm the exact product edition, deployment model, and external-access workflow during evaluation.
Security requirements to put in your RFP
A zero-footprint viewer is not automatically a secure image-sharing solution. I would require vendors to demonstrate the following:
VPN-free external access: Outside physicians connect through a secured, internet-accessible service without network access to your internal systems.
Strong authentication: Named accounts, MFA, and preferably federated identity where feasible. If using share links, require recipient verification and controls against unauthorized forwarding.
Patient-level permissions: Access restricted to the specific patient and study, with expiration and revocation.
Minimal local data: Images are streamed or rendered remotely, with controls for browser caching, downloads, printing, and local storage.
Auditability: Logs capture who accessed which patient's images, when, and from where.
HIPAA and contractual protections: Appropriate business associate agreement, encryption in transit and at rest, retention policies, incident response, and documented security controls.
Clinical suitability: Verify whether the viewer is cleared for the intended diagnostic use, particularly for primary radiology interpretation versus referring-physician review.
My recommendation
Start with Intelerad Enterprise Viewer, Philips Enterprise Viewer, and Sectra UniView if you already operate an enterprise PACS or VNA and want to extend image access securely to outside physicians.
Prioritize Intelerad InteleShare or Microsoft PowerShare if the bigger problem is exchanging images across organizations that use different imaging systems.
Before choosing, run a proof of concept in which an outside physician receives access to a test study, opens it on a standard browser without a VPN, reviews the images, and then loses access when the permission expires.
One question that would help narrow the shortlist: What imaging environment do you currently use?
1. Current imaging environment
Existing PACS or VNA (e.g., Sectra, GE, Philips, Fuji, Agfa)
Cloud PACS
No central PACS / standalone imaging center
Multiple hospitals or different PACS vendors
2. Organization size
Small imaging center or practice
Hospital or health system
Multi-organization network or HIE
3. Primary use case
Referring doctors reviewing studies and reports
Diagnostic interpretation by outside radiologists
Sending and receiving full imaging studies between organizations
Prominent enterprise and cloud solutions engineered for this workflow include:
PostDICOM provides an online, HTML5 zero-footprint diagnostic viewer that runs natively inside modern browsers (Chrome, Safari, Firefox, Edge) across desktop and mobile devices. It allows secure sharing via encrypted links without demanding VPN configurations or local plugin installations.[]()
Compatibility with your current PACS/RIS/EHR and automated study distribution
Operations
Clear retention policies, uptime commitments, support, and total cost at your expected study volume
Ambra Health (by Intrado/Radiology Workflow) : Industry leader in cloud-based medical image exchange and PACS integration. It allows you to send secure, encrypted, password-protected links to referring physicians. They can open and manipulate high-resolution studies instantly via a web-based, zero-footprint viewer without any local installs or VPNs.[](https://www.instagram.com/reel/DeVB9RjCbXz/)
Sectra UniView / IDS7 : Ideal if you are looking for an enterprise-grade solution. Sectra UniView serves as an enterprise zero-footprint viewer allowing secure web access to images, history, and integrated reports across your broader healthcare network without heavy client installations.[](https://medical.sectra.com/product/sectra-reporting/)
No VPN Required: Access is managed via HTTPS, tokenized secure links, or multi-factor authentication (MFA) portal logins.
Sectra UniView serves as an enterprise-level universal viewer designed for referring physicians and cross-site collaboration. It embeds directly into Electronic Medical Records (EMRs) or launches via secure URLs, supporting both DICOM and non-DICOM media (such as clinical photography or PDFs) without a VPN.[](https://medical.sectra.com/product/sectra-uniview/)
Medicai offers a cloud-based, HIPAA-compliant zero-footprint platform with built-in DICOM viewing tools (MPR, measurements, windowing/leveling). It features granular role-based access control and secure link-sharing designed specifically for second opinions and multi-site external consultations.[](https://www.medicai.io/products/dicom-viewer)
MedDream (by Softneta) is an HTML5 zero-footprint DICOM viewer supporting cloud or hybrid deployments. It delivers full diagnostic image manipulation (CT, MRI, US, X-ray) and cross-site image access via standard web browsers, omitting any client-side footprint.[](https://darwinist.io/docs/meddream/)
ClaronHealth / NilRead provides a universal zero-footprint viewing and sharing architecture (via tools like NilFeed) that enables outside facilities to transmit studies into an access hub where external or referral clinicians can immediately view them via a browser. Nothing is left on the external hardware after the viewing session terminates.[](https://www.radiologytoday.net/imaging-informatics-sharing-images-outside-of-pacs/)
If you'd like to narrow down these options, let me know:
Do you need this integrated with a specific EHR/EMR (like Epic or Cerner)?
Are you looking for a cloud-native SaaS or a solution that layers over an on-premise PACS?
