CT PERFUSION · HIGH AGREEMENT WITH RAPID

The numbers.
The images.
The whole picture.

See the core. Explore the perfusion deficit.
Bring every map into focus with ystia.

0.95Core volume CCC

0.94Hypoperfusion CCC

Agreement with RAPID · 241 QC-passed anterior-circulation studies with DWI-confirmed lesions. Digital Twin development cohort. See the evidence ↗

PERFUSION, IN FOCUSANONYMIZED SAMPLE

High-resolution perfusion maps showing an extensive unilateral perfusion deficit

A large MCA-territory perfusion deficit.
A detailed view of the tissue.↙

01 / THE NUMBERS

Strong agreement.
At meaningful scale.

Compared with RAPID.
Evaluated in the Digital Twin
development cohort.

VOLUME AGREEMENT0.95CCC

Core volume

rCBF <30% · Approx. 95% CI 0.939–0.959

VOLUME AGREEMENT0.94CCC

Hypoperfusion volume

Tmax >6 s · Approx. 95% CI 0.919–0.950

THE BROADER VALIDATION1,727

RAPID-paired studies

Within a 2,793-study campaign

The headline CCCs describe 241 QC-passed anterior-circulation studies with DWI-confirmed lesions. CCC is Lin’s concordance correlation coefficient, a measure of agreement.

See the broader results and study context

Volume agreement with RAPID in the Digital Twin development cohort
Evaluation group	Studies	Core CCC	Hypoperfusion CCC
QC-passed anterior circulation, DWI lesion present	241	0.950	0.936
QC-passed, RAPID Tmax volumes >400 mL excluded	1,554	0.928	0.932
All RAPID-paired studies	1,727	0.902	0.791

Hypoperfusion values use the confident display tier. Retrospective development-cohort evaluation, September 2026. RAPID is a comparator, not ground truth. These results do not establish external clinical validation or interchangeability with RAPID.

02 / THE RESULTS

More than a number.
A view into every result.

A real Digital Twin research example.
Large MCA-territory involvement.
Extensive perfusion mismatch.

ANONYMIZED RESEARCH EXAMPLE / Select an image to explore it in full resolution

THE OVERVIEW

Core. Hypoperfusion. Mismatch.

The volumes that matter, alongside the images that give them meaning.

Open full resolution

Anonymized research overview with core and hypoperfusion volumes, mismatch, and axial result maps

PERFUSION MAPS

Every map. In detail.

Relative blood flow, perfusion delay and mismatch.

Anonymized high-resolution relative CBF, Tmax and threshold-defined mismatch images

Open full resolution

OXYGEN & TRANSIT MAPS

A further dimension.

Model-derived OEFmax, CMRO₂max and transit maps.

Anonymized model-derived oxygen extraction, oxygen metabolism and transit-time maps

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Explore threshold overlays & mismatch Open the sample at a glance

Selected for illustration, not as an estimate of average performance. Source identifiers are removed. Oxygen and metabolism maps are model-derived research estimates, not measured oxygen values.

Quantified volumes

Core and hypoperfusion volumes, mismatch volume and mismatch ratio.

High-resolution images

Summary views, threshold overlays, perfusion maps and oxygen-model maps.

Results as they arrive

Available images, processing progress and quality status in one place.

03 / THE EXPERIENCE

The whole picture.
In your pocket.

Your results travel with you. Review the numbers, open the images, and follow processing from your iPhone.

01 Key volumes at a glance
02 Full-resolution image review
03 Processing updates as results arrive

Illustrative iPhone UI with invented numbers.
The image is an anonymized research example.

Download the beta ↗Open web app ↗

Study access is limited to invited hospital members.

Anonymized perfusion sample within an illustrative phone interface — App

Live Activity · Demo

The numbers.
The images.
The whole picture.