# QRN: Radiation Therapy Marking Device

- Device class: 2; regulation: 21 CFR 892.5785; FDA's rule: 510(k) required
- FDA decisions: 2
- 510(k) review time 2021–2025: median 255 days (middle half 255–255)
- Recalls: 0 (0 Class I)
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026; MAUDE to Sep 30, 2026

## Decisions per year (last 10)
- 2021: 1
- 2023: 1

## Most-cited predicates
- DEN200041: Comfort Marker 2.0. (2021), cited by 1

Source page: https://510kreport.com/product-code/QRN
Data by year (CSV): https://510kreport.com/product-code/QRN.csv