# K940663: Peacock Plan

- Pathway: 510(k) (Traditional)
- Applicant: Nomos Corp.
- Decided: Apr 9, 1996 after 781 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
Longest line of descent: 1 generation back to K884261 (1989). 3 ancestors in all.
57 later devices descend from it; 7 cite it directly.
0 of 61 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K884261: Prowess 2000, Small Systems Group, Inc. (1989) Summary page 1.
- K896353: GE Target Series 2, GE Medical Systems (1989) Summary page 1.
- K903403: CT-Compatible Fletcher System Applicator, University of Michigan (1990) Summary page 1.

## Most influential descendants
- K984532: Cadplan Helios Option 6.0 (1999), 27 descendants of its own
- K993766: Helax-TMS V 5.0 Radiation Therapy Treatment Planning System (1999), 24 descendants of its own
- K010682: Helax-TMS V 5.1 Radiation Therapy Treatment Planning System (2001), 23 descendants of its own
- K020971: DCM 2.0 (2002), 22 descendants of its own
- K130617: Raystation (2013), 21 descendants of its own

## Indications for use
The indications for the NOMOS Peacock Plan are the same as those for the predicate devices with external beam radiation: Present a graphical display of the resultant dose distribution around a target which is based upon the size, shape and position of the radiation treatment fields.

Source page: https://510kreport.com/device/K940663
Methodology: https://510kreport.com/methodology