# K923522: Linac-Based Sterotactic Radiosurgery

- Pathway: 510(k) (Traditional)
- Applicant: Radionics Software Applications, Inc.
- Decided: Aug 18, 1993 after 398 days
- Product code: IYE (Accelerator, Linear, Medical)
- Device class: 2
- Regulation: 21 CFR 892.5050
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
No predicates in its family tree.
2 later devices descend from it; 2 cite it directly.
0 of 3 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- None. FDA has not posted a summary or statement for it, so its predicates are not known.

## Most influential descendants
- K974310: Nomos Slit Collimator (Beak) (1998), 0 descendants of its own
- K963860: The Nomos Talon Positioning and Immobilization System (1996), 0 descendants of its own

Source page: https://510kreport.com/device/K923522
Methodology: https://510kreport.com/methodology