Cleared Special

K251561 - Biograph Trinion (FDA 510(k) Clearance)

Class II Radiology device cleared through the Special 510(k) pathway - typically does not require clinical trials.

K251561 · Siemens Medical Solutions USA, Inc. · Radiology device
Download Printable Device Report (PDF)
Optimized for regulatory review, auditing and printing
Jul 2025
Decision
71d
Days
Class 2
Risk

K251561 is an FDA 510(k) clearance for the Biograph Trinion. Classified as System, Tomography, Computed, Emission (product code KPS), Class II - Special Controls.

Submitted by Siemens Medical Solutions USA, Inc. (Knoxville, US). The FDA issued a Cleared decision on July 31, 2025 after a review of 71 days - a notably fast clearance cycle.

This device falls under the Radiology FDA review panel, regulated under 21 CFR 892.1200 - 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 Siemens Medical Solutions USA, Inc. devices

Submission Details

510(k) Number K251561 FDA.gov
FDA Decision Cleared Substantially Equivalent - Traditional 510(k) (SESE)
Date Received May 21, 2025
Decision Date July 31, 2025
Days to Decision 71 days
Submission Type Special
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
36d faster than avg
Panel avg: 107d · This submission: 71d
Pathway characteristics
Modification to existing cleared device.

Device Classification

Product Code KPS System, Tomography, Computed, Emission
Device Class Class 2 - Special Controls
CFR Regulation 21 CFR 892.1200
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 - KPS System, Tomography, Computed, Emission

All 469
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