Viz CTP

K180161

Viz.ai, Inc. · cleared 2018-04-20 · product code LLZ · Radiology

Premarket evidence — what FDA accepted

Device typesamd

source quote (p.3)

“Viz CTP is an image processing software package to be used by trained professionals, including but not limited to physicians and medical technicians. The software runs on a standard "off-the-shelf" computer or a virtual platform, such as VMware, and can be used to perform image processing, analysis, and communication of computed tomography (CT) perfusion scans of the brain.”

Algorithmimage analysis algorithm that calculates parameters related to tissue blood flow (perfusion) and tissue blood volume, including Cerebral Blood Flow (CBF), Cerebral Blood Volume (CBV), Mean Transit Time (MTT), Residue function time-to-peak (TMax), and Arterial Input Function (AIF).

source quote (p.4)

“Viz CTP is a standalone software package that is comprised of several modules including DICOM receiving and sending modules, a study processor, image analysis algorithm, as well as software system components including a DICOM storage database and system health-monitoring. Viz CTP image analysis includes calculation of the following perfusion related parameters: Cerebral Blood Flow (CBF), Cerebral Blood Volume (CBV), Mean Transit Time (MTT), Residue function time-to-peak (TMax), Arterial Input Function (AIF)”

Adaptive (vs locked)FDA source did not state this

PCCPFDA source did not state this

Cybersecurity addressedFDA source did not state this

Validation studies (1)

Bench

sample size not stated

endpoints: Correlations between the output of the Viz CTP device and the ground truth values; AIF detection; soft matter extraction; cerebral blood flow (CBF); cerebral blood volume (CBV); mean transit time (MTT); time to maximum residue (TMax)

standards: DICOM (Digital Imaging and Communications in Medicine), NEM PS 3.1-3.20 (2016)

Reported performance (1 observation)

time_to_resultas written: “time to maximum residue (TMax)”stated without value

source quote (p.7)

“The results of performance testing showed that the Viz CTP device achieved the pre-established performance goals for AIF detection, soft matter extraction, and each perfusion parameter: cerebral blood flow (CBF), cerebral blood volume (CBV), mean transit time (MTT), and time to maximum residue (TMax).”

Each value carries its own analysis unit and task — never compare or pool across devices. Source: 510(k) summary PDF.

Predicate network

Postmarket — what happened after clearance

recalls in product code, 24mo

295

MAUDE reports in code, 12mo

+683%

vs code's own 3-yr baseline

drift signals on this device

re_clearance
The FDA AI/ML device list shows a newer 510(k) K221100 (decision 2022-08-29) from Viz.ai, Inc. for a matching device line ("Viz RV/LV") — a new clearance for the same line is a change event.
first seen 2026-07-08 · k_number:K221100
adverse_event_inflection
MAUDE adverse-event reports for product code LLZ: 295 in the 12 months ending 2026-06, vs a 37.7/12mo average over the prior 3 windows (+683%). Code-level count — reports are not attributed to this specific device.
first seen 2026-07-08 · openFDA /device/event.json count=date_received product_code=LLZ
recall_reason_pattern
Software/algorithm-related recall in product code LLZ (GE Medical Systems SCS, initiated 2026-05-08): "GE HealthCare has become aware of a context synchronization issue in AW Server 3.2 ext. 6.5. When a user selects a patient or exam in the AW Server Web Client worklist and launches" Recalling firm is another firm in the same product code.
first seen 2026-07-08 · recall res_event_number:99042
recall_reason_pattern
Software/algorithm-related recall in product code LLZ (PHILIPS MEDICAL SYSTEMS NEDERLAND B.V. Veenpluis 4-6 Best Netherlands, initiated 2026-03-05): "Potential that mis-ordered frames in Vue Motion during dynamic cine runs may cause images frames to display out of sequence." Recalling firm is another firm in the same product code.
first seen 2026-07-08 · recall res_event_number:98520
recall_reason_pattern
Software/algorithm-related recall in product code LLZ (GE Medical Systems, LLC, initiated 2026-01-30): "There is a potential cybersecurity vulnerability affecting certain versions of Centricity Universal Viewer. User login credentials may be exposed on the local client workstation, w" Recalling firm is another firm in the same product code.
first seen 2026-07-08 · recall res_event_number:98428
recall_reason_pattern
Software/algorithm-related recall in product code LLZ (Focalyx Technologies, LLC., initiated 2025-12-23): "Software device that is an accessory for image-guided interventional and diagnostic procedures involving prostate has accessories that may not function properly with Windows 10, wh" Recalling firm is another firm in the same product code.
first seen 2026-07-08 · recall res_event_number:98137
…and 21 more.

Recall and MAUDE counts are product-code-level (reports aren't reliably attributable to one device). Signals are descriptive observables with sources — never a judgment that the device is unsafe or drifting. Snapshot 2026-07-08.

Reimbursement — how devices like this got paid

Not yet tracked — no payment pathway indexed for this clearance (the reimbursement corpus is a growing seed set).