STAT teleradiology turnaround: benchmarks and SLA terms

A vendor quotes you "STAT reads in 15 minutes" and your current provider's contract says under 2 hours, and you have no way to tell whether either number describes the same measurement. That is the practical problem with STAT teleradiology turnaround: the quoted minutes are meaningless until you know what clock they run on, what fraction of studies they describe, and who measured them.

This page gives you the cited benchmarks, the clock definitions, and the SLA language that turns a quoted number into an enforceable one. For how to operate the STAT tier day to day, routing and escalation and quality control, see the operational guide to STAT radiology reads. If you want a written commitment to compare against, a rate card with SLA terms reaches you within one business day of a request.

What STAT teleradiology turnaround is achievable?

Under 1 hour to a final signed report is the competitive contractual tier in 2026, and the measured performance of good services sits well inside it. The published evidence, thin as it is, supports the hour as a realistic ceiling. A two-year retrospective study of a multistate teleradiology service reading emergency pediatric and adolescent neuroimaging, published in BMC Emergency Medicine, measured mean turnaround of 37.5 minutes for CT and 61.2 minutes for MRI. Those are means across an emergency workload, delivered across state lines, by a distributed panel.

Hospital-side numbers are slower because they bundle in everything that happens before the read. A quality improvement study of emergent CT in an academic emergency department, available through PubMed Central, worked on order-to-result intervals measured in multiple hours, and treated cutting tens of minutes as a publishable success. Neither framing is wrong. They are different clocks, and comparing a teleradiology vendor's read-time against your hospital's order-to-result time flatters the vendor by exactly the width of your scanner queue.

Market context, for what vendors publish: NDX Imaging lists report turnaround times with STAT tiers quoted in the 30-to-60-minute range, checked September 2026, and AAG Health's benchmark summary puts critical-case CT and MRI at 60 to 120 minutes as the general expectation. A quote materially faster than all of this, 5 or 10 minutes to a final read, should trigger the question of whether it describes a preliminary interpretation, an AI pre-read, or a median measured over a hand-picked window.

AstraRad's STAT tier is under 1 hour by contract, measured from last-image arrival to radiologist signature, and the measured median is 30 minutes, published monthly. Urgent is under 4 hours, routine under 24. Over the trailing 12 months, 99.4 percent of reports came back inside their tier. Every STAT read is a final signed report from a fellowship-trained subspecialist; the difference that final makes at 3 a.m. is a re-read your own radiologists never perform.

Which clock is the contract running?

Four clock definitions circulate in STAT SLAs, and two contracts with the same "under 60 minutes" promise can differ by an hour of real elapsed time depending on which one they use.

Clock start	What it includes	Who it favors
Order placed	Scanner queue, scan time, transmission, read	You; almost no vendor will sign it
First-image arrival	Transmission tail and the full read	You, slightly; multi-series studies still transmitting
Last-image arrival	The read, entirely	Neutral; the honest basis for judging a reader
Study assigned to radiologist	Only the time a reader spends with it open	The vendor; unassigned queue time vanishes

Last-image arrival to radiologist signature is the defensible definition, because interpretation cannot begin on a partial study and the signature is an auditable event in the PACS log. Assignment-based clocks deserve particular suspicion: a study can sit thirty minutes in an unassigned worklist and the SLA report will still show a twelve-minute read. When a vendor's published turnaround looks implausibly fast, the clock definition is usually where the minutes went; the guide to verifying vendor claims covers how to audit this from your own RIS timestamps rather than the vendor's dashboard.

The stop event needs the same precision. Signature is clean and auditable. "Report available" can mean delivered to the vendor's portal, which your emergency physician does not watch; if the report must land in your RIS or EMR to count, write the delivery event into the definition. Transmission from vendor to RIS adds minutes that belong to somebody, and the contract should say to whom.

What do stroke and trauma pathways demand of the tier?

Specialty pathways run tighter than any general STAT tier, and they are where a turnaround promise meets a quality measure with regulatory weight. CMS's stroke measure, OP-23 in the CMS measure inventory, expects head CT or MRI interpretation within 45 minutes of emergency department arrival for suspected stroke patients. Count backward: triage, transport to the scanner, the scan itself, and transmission consume most of that window before a remote radiologist sees a single image. The interpretation slice that remains is 10 to 20 minutes in most real pathways.

A general 60-minute STAT tier does not satisfy that arithmetic, and a vendor who says it does has not run a stroke program. The workable structure is a named sub-tier: stroke protocol studies identified at order, routed ahead of other STAT work, with their own target and their own line on the monthly report. That is how AstraRad's stroke protocol commitment is built: under 30 minutes from last-image arrival to signature, inside a STAT tier that stays at under 1 hour, published on the SLA page on the same clock as every other figure. Trauma pan-scans deserve the same treatment for a different reason, size: a multi-region CT with reformats is a bigger read, and pretending it fits the same minutes as a head CT just manufactures breaches. The mechanics of protocol-priority routing are covered on STAT CT reads and the STAT coverage use case.

Why STAT turnaround degrades, and what keeps it flat

A STAT tier that holds in March and fails in July did not change its contract; it changed its conditions. Four forces do most of the damage, and each has a structural answer you can ask a vendor about directly.

Volume surge is the first. A tier measured at 400 studies a month says nothing about performance at 700 unless the panel has slack. Ask what headroom exists today, in studies per month, and what happens to your queue when another client doubles their volume; a shared panel with no published headroom is a tier that degrades on someone else's busy week. AstraRad's panel holds room for 25,000 additional studies a month, which is the specific answer that question is looking for.

Night and weekend staffing is the second. STAT volume concentrates in exactly the hours when panels run thinnest, so a vendor's staffing model matters more than its roster size. A panel working scheduled overnight shifts behaves differently from one where a day-shift radiologist rotates on after a full day; fatigue shows up in the tail of the turnaround distribution before it shows up anywhere else.

Study complexity mix is the third. A quarter of trauma pan-scans in the STAT stream slows the whole tier if the contract pretends every STAT study is a head CT. Tiers priced and measured by study type absorb mix shifts; single-bucket tiers manufacture breaches whenever the mix moves.

Transmission is the fourth, and it is usually yours. A 2,000-image CT angiogram over a constrained VPN can spend more time in transit than in interpretation. If the clock starts at last-image arrival, transmission delay is invisible to the SLA and entirely real to your emergency physician. Audit your own send times quarterly; the fix is bandwidth or routing configuration, and no reading contract can supply either. Most facilities that think they have a slow vendor find, on audit, that a third of the elapsed time never left their own building.

How should the SLA define STAT teleradiology turnaround?

An enforceable STAT tier has five parts, and most contracts that fail buyers are missing the third and fifth.

• The clock: start and stop events, named as system events. "From last-image arrival at [vendor] to radiologist signature."
• The target: the tier ceiling. "STAT studies are signed within 60 minutes."
• The compliance threshold: what fraction must land inside the ceiling. "At least 95 percent of STAT studies per calendar month." Without this line, a vendor can miss a third of studies and still claim the tier holds on average.
• The measurement and report: who computes it, from what data, delivered when. "Vendor reports monthly: volume, median, 90th percentile, and compliance by tier, from PACS timestamps, by the fifth business day."
• The remedy: what a missed month costs. Service credits are standard; a termination trigger after consecutive missed months is the clause with actual deterrent force.

Words that void the whole exercise: "target," "goal," "typical," "best efforts." Each converts the tier from a commitment into an aspiration. Strike them or price them at zero.

Two structural details separate a good SLA from a decorative one. First, exclusions: every SLA carries them, and the honest ones are narrow and named (a study with corrupted transfer, a facility-side network outage, a mislabeled priority). An exclusion for "periods of high volume" excludes the exact circumstance the tier exists for. Second, the definition of the study population: if only studies flagged STAT at order count, confirm that a study escalated mid-stream inherits the tier from the escalation timestamp forward. The SLA page shows how AstraRad writes each of these elements, and it is the single dated source for every performance number this site publishes.

Median, percentile, and the shape of a turnaround distribution

Turnaround distributions are skewed. Most STAT studies come back quickly, and a small tail takes far longer, so every summary statistic tells a different story about the same month. A vendor choosing their best number will quote the median. A buyer protecting a 3 a.m. patient needs the tail.

Hold the tier with three numbers together, monthly, per tier: the median, the 90th percentile, and the compliance rate against the contractual ceiling. The median tells you what a typical study experiences. The 90th percentile tells you what a bad night looks like. The compliance rate is the contract. Any two without the third can hide a real problem: a 25-minute median coexists comfortably with a 9 percent breach rate if the tail is long enough.

Ask one more question of the data: is it measured continuously or sampled? Monthly numbers computed from every study, straight from PACS timestamps, are cheap to produce and hard to game. A "measured median" that turns out to be a two-week pilot from last spring is an anecdote. AstraRad measures monthly across all volume, and the STAT premium itself is a single printed multiplier on the per-report rate card, with no after-hours or weekend surcharges layered on the hours when STAT volume actually arrives.

Verifying a turnaround claim before you sign

You can test a STAT turnaround claim in a two-week pilot with nothing but your own timestamps. Send live parallel volume or a retrospective batch, and log three events per study on your side: last-image sent, report received in your RIS, and (for the subset that got one) the critical-findings call time. Compute your own median and 90th percentile. The vendor's dashboard should agree with your log within transmission tolerance; a systematic gap means their clock and your clock start at different events, and you have found the fine print before it found you.

During the pilot, weight the sample toward your hard hours. A vendor's Tuesday-afternoon performance predicts nothing about Saturday at 2 a.m., when the panel is thinnest and your emergency department is fullest. Ten STAT studies sent across two weekend nights tell you more than a hundred sent during business hours.

AstraRad's tiers, medians, and compliance history are in writing before any pilot: STAT under 1 hour with a 30-minute measured median, urgent under 4 hours, routine under 24, 99.4 percent SLA compliance over the trailing 12 months, measured from last-image arrival to signature. A rate card with the full SLA terms arrives within one business day of a request, and the pilot can start from there.