Cleared Special

K051941 - CYBERNIFE STEREOTACTIC RADIOSURGERY SYSTEM

K051941 is an FDA 510(k) clearance for CYBERNIFE STEREOTACTIC RADIOSURGERY SYSTEM, manufactured by Accuray, Inc.. The device is a Class 2 Radiology device with product code MUJ cleared through the Special 510(k) pathway after a 22-day FDA review.

K051941 · Accuray, Inc. · Radiology device
Download Printable Device Report (PDF)
Optimized for regulatory review, auditing and printing
Aug 2005
Decision
22d
Days
Class 2
Risk

K051941 is an FDA 510(k) clearance for the CYBERNIFE STEREOTACTIC RADIOSURGERY SYSTEM. Classified as System, Planning, Radiation Therapy Treatment (product code MUJ), Class II - Special Controls.

Submitted by Accuray, Inc. (Sunnyvale, US). The FDA issued a Cleared decision on August 9, 2005 after a review of 22 days - a notably fast clearance cycle.

This device falls under the Radiology FDA review panel, regulated under 21 CFR 892.5050 - the FDA radiology and imaging software oversight framework. As a Special 510(k), this submission covers a manufacturer modification to an existing cleared device rather than a new device introduction.

Device pattern: Iterative device modification. Low regulatory complexity profile. This Special 510(k) clearance confirms that the manufacturer's modifications remained within the established regulatory envelope of the original cleared device.

View all Accuray, Inc. devices

FDA 510(k) Submission Details - K051941

510(k) Number K051941 FDA.gov
FDA Decision Cleared Substantially Equivalent - Traditional 510(k) (SESE)
Date Received July 18, 2005
Decision Date August 09, 2005
Days to Decision 22 days
Submission Type Special
Review Panel Radiology (RA)
Summary Summary PDF
Third-party Review No - reviewed directly by FDA
Regulatory Context
Review time vs. panel average
85d faster than avg
Panel avg: 107d · This submission: 22d
Pathway characteristics
Modification to existing cleared device.

MUJ Device Classification - Class 2, Special Controls

Product Code MUJ System, Planning, Radiation Therapy Treatment
Device Class Class 2 - Special Controls
CFR Regulation 21 CFR 892.5050
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 - MUJ System, Planning, Radiation Therapy Treatment

All 166
Devices cleared under the same product code (MUJ) and FDA review panel - the closest regulatory comparables to K051941.
COHERENCE DOSIMETRIST, MODEL 2.2
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