TomoTherapy® QA

Complete solution for commissioning and quality assurance of the TomoTherapy systems.


  • An 8-channel reference-grade electrometer with 1 fA resolution and accurately matched time constants for precision measurements.
  • Interface with system software or operate as a stand-alone electrometer whenever multiple channel measurements are required.


  • Light-weight, two-dimensional radiation beam analyzer for commissioning, data acquisition and absolute dosimetry analysis for TomoTherapy systems.
  • Saves setup time by following standard protocols prescribed by TomoTherapy.


TomoTherapy QA
REF Number 91750 - TomoScanner™ Water Tank Scanner Controller Box and Water Tank
90016 - TomoElectrometer™ 8 Channel Electrometer
TomoElectrometer™ and TomoScanner™
Height 11.7 cm (4.6 in)
Width 30.5 cm (12.0 in)
Length 26.7 cm (10.5 in)
Water Tank
Inside Height 27.9 cm (11.0 in)
Inside Width 26.9 cm (10.6 in)
Inside Length 60.4 cm (23.8 in)
Outside Height 29.9 cm (11.8 in)
Outside Width 29.3 cm (11.5 in)
Outside Length 62.8 cm (24.7 in)
Wall Thickness 1.3 cm (0.51 in) nominal
TomoElectrometer™ General Dosimetry Channels Rate range: 0.001 pA - 4.900 nA
Charge range: 0.01 pC - 999,999 nC
Sample rate: 100 Hz, t = 10 msec
Detector response time: 500 msec (99.3% of max)
Digital filter of rate mode readings: < 2 sec
TomoElectrometer™ Fast Response Channels Rate range (5-7): 0.001 pA - 4.900 nA
Charge range (5-7): 0.01 pC - 999,999 nC
Rate range (channel 8): 0.01 pA - 19.600 nA
Charge range (channel 8): 0.1 pC - 999,999 nC
Sample rate: 100 Hz, t = 10 msec
Detector response time: 165 msec (99.3% of max)
Scanning Arm Leadscrew Accuracy
Resolution ± .25 mm
Repeatability ± .25 mm
TomoScanner™ 36 VDC@1.39 A. Use only with supplied Globtek®, Inc. power supply model GTM21097-5048-12.0
TomoElectrometer™ 9 VDC@1.7 A. Use only with supplied supplied Globtek®, Inc. power supply model GTM21089-1509-T3
Product Standards
TomoElectrometer™ CE0413, Externally certified IEC 60601-1, IEC 60601-1-2
Water Tank CE0413, Externally certified IEC 61010-1
Software/Computer Requirements Operating System: Windows 10 Professional, 64 bit recommended
Processor: Dual core, 1 GHZ; Quad core, 2 GHZ recommended
Memory: 32-bit OS; 2GB, 4GB recommended; 64-bit OS; 4GB, 8 GB recommended
Runtime Environment: Visual C++ 2010 Runtime
Hard Drive: 32 GB or greater, 3 GB free space
Screen Resolution: 1024x768 or greater
Optical Drive: CD or DVD
Connectivity: IPv4 Lan, 100 Mbit/s or greater


Product Resources

Publications, tech notes, testimonials, and other resources to support TomoTherapy QA.

Looking for a user manual?

Available on request. Contact your Account Manager


View publications related to this product from experts in the fields of medical physics and oncology.

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Tech Notes

Find detailed instructions on how to setup and execute common processes from our experienced technicians.

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Frequently Asked Questions

How often should I send my electrometer in for calibration?

The IEC (International Electrotechnical Commission) recommends electrometer calibration every two years to assure optimal performance.

  • IEC 60731 – Medical electrical equipment – Dosimeters with ion chambers such as used in radiotherapy.
  • IEC 61674 – Medical electrical equipment – Dosimeters with ion chambers and/or semi-conductor detectors as used in X-ray diagnostic imaging.

Standard Imaging can coordinate your calibration at an accredited ADCL, but also provides free inspection and testing services, as well as expedited repair service, if necessary. Our goal is a two-week turnaround upon receipt of equipment, although actual time may vary depending on the ADCL. Request Service »

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