# K972212: 0.015CC Pinpoint Ionization Chamber, 0.005 CC Pinpoint Ionization Chamber

- Pathway: 510(k) (Traditional)
- Applicant: Ptw-New York Corp.
- Decided: Sep 10, 1997 after 90 days
- Product code: LHN (System, Radiation Therapy, Charged-Particle, 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 K954165 (1995). 1 ancestor in all.
1 later device descends from it; 1 cites 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)
- K954165: PTW-MP3 & PTW-MP3S Automatic Water Phantom, Ptw-New York Corp. (1995) Summary page 1.

## Most influential descendants
- K112981: Sun 125C Ionization Chamber (2012), 0 descendants of its own

## Indications for use
High quality ionization chambers, like the PTW T31006 and T31007 Pinpoint type ionization chambers make it possible to routinely measure, record, and document therapeutic amounts of ionizing radiation with an exceptionally high degree of accuracy and precision. This type of lonization chamber is intended to be used for the collection of radiation beam data from radiation therapy treatment machines in water, air, or other suitable solid state phantoms. Since the T31006 and T31007 Pinpoint chambers are waterproof, they are ideally suited for measurements of high energy photons and electrons in a water phantom. The data acquired with this type of chamber can be used to completely document the beam characteristics of treatment machines, compile radiation beam data over time as part of a quality assurance program, and to establish an initial baseline for the radiation therapy beams generated by the treatment unit. High quality ionization chambers, like the PTW Pinpoint type chambers, are essential if accurate data from treatment machines that produce therapeutic amounts of ionizing radiation are to be properly monitored.

Source page: https://510kreport.com/device/K972212
Methodology: https://510kreport.com/methodology