# K921891: Silent Scan

- Pathway: 510(k) (Traditional)
- Applicant: Avotec, Inc.
- Decided: May 13, 1993 after 386 days
- Product code: LNH (System, Nuclear Magnetic Resonance Imaging)
- Device class: 2
- Regulation: 21 CFR 892.1000
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
No predicates in its family tree.
6 later devices descend from it; 2 cite it directly.
0 of 7 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
- K994351: M.R. Vision 2000 Ultra Audio Visual System / Commander X6 System (2000), 4 descendants of its own
- K103507: Medical Visors MV100 (2011), 3 descendants of its own
- K133670: Headphones, Patient Alert, Standalone Interface (2014), 2 descendants of its own
- K173409: Wireless Audio System (2018), 1 descendant of its own
- K193218: Innovision Audio (2020), 0 descendants of its own

Source page: https://510kreport.com/device/K921891
Methodology: https://510kreport.com/methodology