Cleared Traditional

K870821 - POLYTRON MODELS 1001, 1002 AND 1004 (FDA 510(k) Clearance)

Class II Radiology device cleared through predicate-based substantial equivalence - typically does not require clinical trials.

K870821 · Siemens Medical Solutions USA, Inc. · Radiology device
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Jul 1987
Decision
120d
Days
Class 2
Risk

K870821 is an FDA 510(k) clearance for the POLYTRON MODELS 1001, 1002 AND 1004. 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 Siemens Medical Solutions USA, Inc. (Iselin, US). The FDA issued a Cleared decision on July 1, 1987 after a review of 120 days - within the typical 510(k) review window.

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 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 Siemens Medical Solutions USA, Inc. devices

Submission Details

510(k) Number K870821 FDA.gov
FDA Decision Cleared Substantially Equivalent - Traditional 510(k) (SESE)
Date Received March 03, 1987
Decision Date July 01, 1987
Days to Decision 120 days
Submission Type Traditional
Review Panel Radiology (RA)
Summary -
Third-party Review No - reviewed directly by FDA
Regulatory Context
Review time vs. panel average
13d slower than avg
Panel avg: 107d · This submission: 120d
Pathway characteristics
Predicate-based equivalence. No clinical trials required.

Device Classification

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 2262
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