# K974239: Aktina Medical Physics Corporation Photon Beam Blocking System

- Pathway: 510(k) (Traditional)
- Applicant: Aktina Medical Physics Corp.
- Decided: Feb 10, 1998 after 90 days
- Product code: IXI (Block, Beam-Shaping, Radiation Therapy)
- Device class: 2
- Regulation: 21 CFR 892.5710
- 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 K941719 (1994). 1 ancestor in all.
No later device cites it as a predicate yet.
0 of 2 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K941719: 360 Deg. Rotating 1/2 Beam Block, Medtec, Inc. (1994) Summary page 1.

## Indications for use
In Radiation Therapy, it is often necessary to create irregularly shaped fields to contour to the desired treatment shape. Irregular shaped fields can be achieved by supplementing the shaping ability of the treatment machines collimation system with tertiary beam blocks. These Beam Blocks are used to further collimate and contour the treatment field.

Source page: https://510kreport.com/device/K974239
Methodology: https://510kreport.com/methodology