Guide · Understand
How teleradiology works
Teleradiology is the interpretation of medical images by a radiologist working somewhere other than where the images were acquired. This guide follows one study from order to report and explains what makes the arrangement work.
The pathway, step by step
Order and acquisition
A clinician orders the examination with a reason for it. The facility’s technologist performs it and checks that the images are complete.
Routing
The images are sent from the PACS or scanner using the DICOM standard, over a secure connection, to the reading service. The order and clinical history travel by HL7 message, worklist or scanned requisition.
Worklist and assignment
The study appears on a reading worklist, prioritized as STAT, urgent or routine, and is assigned to a radiologist qualified for the modality, licensed for the patient’s state and credentialed with the facility where required.
Interpretation
The radiologist reviews the images with the clinical question and relevant prior studies. If information is missing, they ask through an agreed route.
Reporting
The report, covering clinical information, technique, comparison, findings, limitations and impression, is signed and returned to the facility’s RIS, EHR or PACS, or to the referring office.
Urgent communication
Findings that need urgent action are communicated directly to a responsible clinician, not just placed in the report, and the communication is documented.
Review
A sample of interpretations is peer reviewed, discrepancies are followed up, and service measures are reviewed with the facility.
Preliminary and final reports
A preliminary report is an initial interpretation issued to guide immediate care. It is common overnight in emergency settings and is followed by a final report. A final report is the signed interpretation that becomes part of the medical record.
When the final interpretation differs from the preliminary one in a way that matters, the ACR practice parameter on communication treats that difference as a nonroutine communication: it goes directly to the treating clinician, and the communication is documented. A good scope names who does this and how.
Preliminary
- Guides immediate decisions
- Common overnight and in emergencies
- Always followed by a final report
Final
- Signed interpretation for the record
- Standard for scheduled and outpatient work
- Changes follow as addenda
What stays onsite
Remote interpretation does not include everything a radiologist might do at a facility. These responsibilities stay local unless they are arranged separately:
- Image acquisition, image quality and patient care
- Contrast administration and its supervision, under payer rules, state requirements and facility policy
- Image-guided procedures such as biopsies and aspirations
- Medical direction and ownership of protocols
- For mammography facilities, MQSA obligations including the lead interpreting physician role
What makes it work
The ACR–AAPM–SIIM technical standard for electronic practice of medical imaging describes the technical goals: accurately labeled images, transmitted and stored with appropriate fidelity, available promptly for interpretation and distributed to remote sites. In day-to-day terms, four things decide whether teleradiology feels seamless:
- Context
- The reason for the examination and relevant history arrive with the images.
- Comparison
- Relevant prior studies are available at the moment of reading.
- Communication
- Urgent findings and report changes reach a named clinician, and the call is documented.
- Tested connections
- Every flow was proven with test data before the first patient study.
Common questions
Does the radiologist need a license in our state?
Licensure is set by each state and generally follows where the patient is imaged. That is why reader assignment checks state licensure for every study, alongside any credentialing the facility requires.
How are images protected in transit?
Over encrypted connections, such as a VPN or TLS, agreed with the facility’s IT team. The parties confirm their privacy roles and security requirements, including whether a business associate agreement is required. HIPAA excludes provider-to-provider treatment disclosures from the business associate contract requirement.
How quickly are reports returned?
It depends on priority and on how turnaround is defined. Agree where the clock starts and stops before comparing numbers; see service measures.
Can teleradiology cover only part of the day?
Yes. Daytime, evenings and weekends, overnight, overflow and modality-specific coverage are all common patterns. Compare coverage patterns.
References
Primary sources
- ACR–AAPM–SIIM Technical Standard for Electronic Practice of Medical ImagingAmerican College of Radiology · Revised 2022
- ACR Practice Parameter for Communication of Diagnostic Imaging FindingsAmerican College of Radiology · Revised 2025
- ACR Practice Parameter for Radiologist Coverage of Imaging Performed in Hospital Emergency DepartmentsAmerican College of Radiology · Revised 2023
- DICOM Standard, current editionMedical Imaging & Technology Alliance, a division of NEMA
- Scheduled Workflow integration profileIHE International
- When is a health care provider a business associate of another health care provider?U.S. Department of Health and Human Services
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