# K972211: Multidos, QC6PLUS

- 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 K874893 (1988). 3 ancestors in all.
34 later devices descend from it; 1 cites it directly.
0 of 38 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.
- K900932: 37-702 and 37-703 PC Rainbow, Victoreen, Inc. (1990) Summary page 1.
- K874893: Model 35300 Tracker (TM) Therapy Beam Evaluator, Keithley Instruments, Inc. (1988) Summary page 1.

## Most influential descendants
- K062817: PTW David Imrt QC Verification System (2006), 33 descendants of its own
- K072374: Compass (2007), 31 descendants of its own
- K140660: MOBIUS3D (2014), 23 descendants of its own
- K153014: Mobius3D (2016), 13 descendants of its own
- K191761: Mobius3D (2019), 5 descendants of its own

## Indications for use
The PTW T10004 MULTIDOS is a multiple-purpose, multiple-channel electrometer intended to perform a range of measuring tasks in radiation therapy. As a stand alone dosemeter, MULTIDOS is intended to be used to measure the dose delivered to a patient during a radiation therapy treatment. Dose measurements during treatment may be accomplished by using suitable ionization chambers or solid state detectors and are used to compare and to verify treatment dose to prescribed dose. When connected to the optional QC6PLUS, MULTIDOS is intended to be used to measure the beam characteristics of radiation therapy treatment machines. Data acquired with the MULTIDOS and the QC6PLUS is used to compile radiation beam data over time as part of a quality assurance program. High quality dosimetry devices like the PTW T10004 MULTIDOS and the optional T42007 QC6PLUS make it possible to routinely measure, record, document and verify therapeutic amounts of ionizing radiation with an exceptionally high degree of accuracy and precision. High quality multiple purpose dosimetry devices 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/K972211
Methodology: https://510kreport.com/methodology