# K033224: Hologic QDR Explorer X-Ray Bone Densitometer, Model Explorer

- Pathway: 510(k) (Special)
- Applicant: Hologic, Inc.
- Decided: Nov 5, 2003 after 30 days
- Product code: KGI (Densitometer, Bone)
- Device class: 2
- Regulation: 21 CFR 892.1170
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
Longest line of descent: 3 generations back to K973104 (1998). 12 ancestors in all.
1 later device descends from it; 1 cites it directly.
0 of 14 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K943505: Hologic QDR-3000 X-Ray Bone Densitometer, Hologic, Inc. (1995) Summary page 2.
- K023398: Hologic QDR X-Ray Bone Densitometer, Models 1000, 2000, 4500, Delphi, Discovery, Hologic, Inc. (2002) Summary page 3.

## Most influential descendants
- K041266: Pediatric Reference Database (2004), 0 descendants of its own

## Indications for use
The Hologic QDR Explorer is a fan beam X-Ray Bone Densitometer indicated for (1) the measurement of bone mineral content (BMC) and the estimation of bone mineral density (BMD), (2) comparison of measurements to reference databases, (3) the estimation of fracture risk, (4) body composition analysis, and (5) measurement of periprosthetic BMD

Source page: https://510kreport.com/device/K033224
Methodology: https://510kreport.com/methodology