Cleared Traditional

K101898 - R4 ACERT ULTRASOUND REPORTING SYSTEM

K101898 is an FDA 510(k) clearance for R4 ACERT ULTRASOUND REPORTING SYSTEM, manufactured by R4, LLC. The device is a Class 2 Radiology device with product code LLZ cleared through the Traditional 510(k) pathway after a 435-day FDA review.

K101898 · R4, LLC · Radiology device
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Sep 2011
Decision
435d
Days
Class 2
Risk

K101898 is an FDA 510(k) clearance for the R4 ACERT ULTRASOUND REPORTING SYSTEM. Classified as System, Image Processing, Radiological within the LLZ classification (a category encompassing advanced image processing and PACS-adjacent software), Class II - Special Controls.

Submitted by R4, LLC (Strongsville, US). The FDA issued a Cleared decision on September 15, 2011 after a review of 435 days - an unusually long review period, suggesting complex equivalence evaluation.

This device falls under the Radiology FDA review panel, regulated under 21 CFR 892.2050 - the FDA radiology and imaging software oversight framework. The Traditional 510(k) pathway establishes clearance through substantial equivalence to a legally marketed predicate device, without requiring clinical trial data.

Device pattern: Incremental AI imaging tool. Moderate-to-high equivalence dependency. Overall, this clearance reflects a predicate-aligned approval typical of modern AI radiology extensions - not a novel clinical breakthrough, but a validated iteration within an established regulatory category.

View all R4, LLC devices

FDA 510(k) Submission Details - K101898

510(k) Number K101898 FDA.gov
FDA Decision Cleared Substantially Equivalent - Traditional 510(k) (SESE)
Date Received July 07, 2010
Decision Date September 15, 2011
Days to Decision 435 days
Submission Type Traditional
Review Panel Radiology (RA)
Summary Summary PDF
Third-party Review No - reviewed directly by FDA
Regulatory Context
Review time vs. panel average
328d slower than avg
Panel avg: 107d · This submission: 435d
Pathway characteristics
Predicate-based equivalence. No clinical trials required.

LLZ Device Classification - Class 2, Special Controls

Product Code LLZ System, Image Processing, Radiological
Device Class Class 2 - Special Controls
CFR Regulation 21 CFR 892.2050
What this classification means

Class II devices require demonstration of substantial equivalence to a legally marketed predicate device. This pathway does not require clinical trials - it relies on engineering equivalence and performance data. Most Radiology devices follow this clearance model.

Regulatory Peers - LLZ System, Image Processing, Radiological

All 1288
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