Cleared Special

K033224 - HOLOGIC QDR EXPLORER X-RAY BONE DENSITOMETER, MODEL EXPLORER (FDA 510(k) Clearance)

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

K033224 · Hologic, Inc. · Radiology device
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Nov 2003
Decision
30d
Days
Class 2
Risk

K033224 is an FDA 510(k) clearance for the HOLOGIC QDR EXPLORER X-RAY BONE DENSITOMETER, MODEL EXPLORER. Classified as Densitometer, Bone (product code KGI), Class II - Special Controls.

Submitted by Hologic, Inc. (Bedford, US). The FDA issued a Cleared decision on November 5, 2003 after a review of 30 days - a notably fast clearance cycle.

This device falls under the Radiology FDA review panel, regulated under 21 CFR 892.1170 - 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 Hologic, Inc. devices

Submission Details

510(k) Number K033224 FDA.gov
FDA Decision Cleared Substantially Equivalent - Traditional 510(k) (SESE)
Date Received October 06, 2003
Decision Date November 05, 2003
Days to Decision 30 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
77d faster than avg
Panel avg: 107d · This submission: 30d
Pathway characteristics
Modification to existing cleared device.

Device Classification

Product Code KGI Densitometer, Bone
Device Class Class 2 - Special Controls
CFR Regulation 21 CFR 892.1170
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.