Cleared Traditional

K031661 - 5M MEDICAL FLAT PANEL DISPLAY, ME511L

K031661 is an FDA 510(k) clearance for 5M MEDICAL FLAT PANEL DISPLAY, manufactured by Totoku Electric Co., Ltd.. The device is a Class 2 Radiology device with product code LLZ cleared through the Traditional 510(k) pathway after a 331-day FDA review.

K031661 · Totoku Electric Co., Ltd. · Radiology device
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Apr 2004
Decision
331d
Days
Class 2
Risk

K031661 is an FDA 510(k) clearance for the 5M MEDICAL FLAT PANEL DISPLAY, ME511L. 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 Totoku Electric Co., Ltd. (Nagano-Ken, JP). The FDA issued a Cleared decision on April 23, 2004 after a review of 331 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 Totoku Electric Co., Ltd. devices

FDA 510(k) Submission Details - K031661

510(k) Number K031661 FDA.gov
FDA Decision Cleared Substantially Equivalent - Traditional 510(k) (SESE)
Date Received May 28, 2003
Decision Date April 23, 2004
Days to Decision 331 days
Submission Type Traditional
Review Panel Radiology (RA)
Summary Summary PDF
Third-party Review No - reviewed directly by FDA
Combination Product No
PCCP Authorized No
Regulatory Context
Review time vs. panel average
224d slower than avg
Panel avg: 107d · This submission: 331d
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 1899
Devices cleared under the same product code (LLZ) and FDA review panel - the closest regulatory comparables to K031661.
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