Cleared Traditional

MODEL 4050-64 (K901639) - FDA 510(k) Clearance

Also marketed or referenced as:
5.25 & 4065-64 6.50 LOOP COIL

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

K901639 · Medical Advances, Inc. · Radiology device
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May 1990
Decision
35d
Days
Class 2
Risk

K901639 is an FDA 510(k) clearance for the MODEL 4050-64. Classified as System, Nuclear Magnetic Resonance Imaging (product code LNH), Class II - Special Controls.

Submitted by Medical Advances, Inc. (Milwaukee, US). The FDA issued a Cleared decision on May 14, 1990 after a review of 35 days - a notably fast clearance cycle.

This device falls under the Radiology FDA review panel, regulated under 21 CFR 892.1000 - 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: Fast-track predicate clearance. Standard predicate reliance. The short review cycle indicates strong predicate alignment - the FDA found sufficient equivalence without extended technical review.

View all Medical Advances, Inc. devices

Submission Details

510(k) Number K901639 FDA.gov
FDA Decision Cleared Substantially Equivalent - Traditional 510(k) (SESE)
Date Received April 09, 1990
Decision Date May 14, 1990
Days to Decision 35 days
Submission Type Traditional
Review Panel Radiology (RA)
Summary -
Third-party Review No - reviewed directly by FDA
Regulatory Context
Review time vs. panel average
72d faster than avg
Panel avg: 107d · This submission: 35d
Pathway characteristics
Predicate-based equivalence. No clinical trials required.

Device Classification

Product Code LNH System, Nuclear Magnetic Resonance Imaging
Device Class Class 2 - Special Controls
CFR Regulation 21 CFR 892.1000
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 - LNH System, Nuclear Magnetic Resonance Imaging

All 475
Devices cleared under the same product code (LNH) and FDA review panel - the closest regulatory comparables to K901639.
MAGNETIC RESONANCE DIAGNOSTIC DEVICE
K903319 · GE Medical Systems · Aug 1990
GE SIGNA ADVANTAGE
K901730 · GE Medical Systems · Jul 1990
ADD'L SOFTWARE VERSION D2 FOR MAGNETOM 42 AND 63
K901818 · Siemens Medical Solutions USA, Inc. · May 1990
MAGNETIC RESONANCE DIAGNOSTIC DEVICE ACCESSORIES
K900889 · Siemens Medical Solutions USA, Inc. · Mar 1990
VISTA HPQ SYSTEM, VISTA MR 2055 HP SYSTEM
K900064 · Philips Medical Systems (Cleveland), Inc. · Mar 1990
VISTA MR 2055 HP SYSTEM
K896508 · Philips Medical Systems (Cleveland), Inc. · Jan 1990