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A web-based CT dose calculator

WAZA-ARIv2

Welcome to the WAZA-ARIv2 homepage.
WAZA-ARI is a WEB system that quickly evaluates patient organ dose in CT Exposure.
This system was developed through a collaborative research by National Institute of Radiological Sciences (NIRS), Japan Atomic Energy (JAEA), and Oita University of Nursing and Health Sciences.
WAZA-ARI was released as a trial version in December, 2012. And we expanded the function further in this system and released it as WAZA-ARIv2 on January, 2015.

informationお知らせ

  • April 1, 2019: Update dose database

    The following CT model filter / tube voltage data was added
    ・Siemens Scope Standard 80/110/130 kV
    ・GE BrightSpeed Elite Large/Medium 80/100/120/140 kV
    ・Canon Aquilion Lightning Large/Small 80/100/120/134 kV
    ・Canon Aquilion Precision Large1/Large2/Small1 100/140 kV
    ・Canon Aquilion ONE GENESIS Large/Medium 100 kV
    ・Canon Aqulion ONE NATURE Large/Medium 80/100/120 kV
    ・Philips IQon Spectral CT Medium 120 kV
    ・GE Revolution CT Medium 120 kV

    The following model names have been changed.
    ・Aquilion ONE(TSX-301) → Aquilion ONE ViSION
    ・Aquilion Prime → Aquilion PRIME Beyond / Aquilion PRIME Focus
    ・Aquilion ONE Genesis(TSX-305) → Aquilion ONE GENESIS
    ・Aquilion Precision(TSX-304) → Aquilion Precision
    ・Scenaria → SCENARIA

  • May 4, 2019: Out of service due to syste maintenance

    Sorry for out of service due to system maintenance at the followoing date and time.
    May 27, 13:00 ~ 14:00 (JST)

  • Febrary 22, 2019: Update dose database

    The following CT model filter / tube voltage data was added
    ・Siemens Definition AS+ Standard 70/80/100/120/140 k.

  • Febrary 6, 2019: Update dose database

    The following CT model filter / tube voltage data was added
    ・Siemens Definition Edge Standard 70 kV
    ・Siemens Definition AS Standard 70 kV
    ・Siemens Force Standard 70, 90, 110, 130, 150 kV
    ・Canon Aquilion Precision TSX-304 Large1/Large2/Small1 80/120 kV
    ・Canon Aquilion ONE Genesis Edition TSX-305 Large/Medium 80/120 kV

    [Body], [Head] has been added as a filter option as a common protocol corresponding to filter name of standard body scan and head scan of each CT model.

  • January 22, 2019: Update dose database

    The following CT model filter / tube voltage data was added
    ・GE OptimaCT660 Large/Small 100/140 kV
    ・GE RevolutionEVO Large/Small 100/40 kV
    ・Hitach Scenaria Normal/Small 140 kV
    ・Hitach Supriaシリーズ Normal 140 kV
    ・Canon Alexion Medium 100 kV
    ・Canon Alexion Access Edition 100 kV
    ・Siemens Definition Flash Standard/Wide 140 kV
    ・Siemens Definition Edge Standard 140 kV
    ・Siemens Definition AS Standard 140 kV
    ・Siemens Force Standard 140 kV

  • January 8, 2019: Out of service due to syste maintenance

    Sorry for out of service due to system maintenance at the followoing date and time.
    January 30, 13:00 ~ 14:00

  • December 13, 2018: Update dose databas

    The following CT model filter / tube voltage data was added
    ・GE LightSpeed RT Large/Small 80/100/120 kV
    ・Philips Ingenuity Large 80/120 kV

  • September 3, 2018: Out of service due to syste maintenance

    Sorry for out of service due to system maintenance at the followoing date and time.
    November 7, 10:00 ~ 16:00

  • July 4, 2018: Update dose databas

    The following CT model filter / tube voltage data was added
    ・Siemens Emotion6 Standard 80/110 kV
    ・Siemens Emotion16 Standard 80/110 kV
    ・Siemens Perspective Standard 80/110 kV
    ・GE OptimaCT660 Large/Small 80 kV
    ・GE RevolutionEVO Large/Small 80 kV

    The beam width name, CTDI value, etc. in Siemens Emotion6 were changed from the reference values from ImPACT to the reference values from the equipment manual of Emotion6.

  • July 4, 2018: Out of service due to syste maintenance

    Sorry for out of service due to system maintenance at the followoing date and time.
    July 25 13:00 ~ 14:00

  • March 21, 2018: Update dose database

    Manufacturer name was changed as follows
    ・Toshiba → Canon

    The following CT model filter / tube voltage data was added.
    ・Philips Brilliance 64 Large 80/120 kV
    ・Philips Brilliance iCT Large/Small 80/120 kV
    ・Canon Aquilion ONE(TSX-301) Large/Medum/Small 100/135 kV
    ・Canon Aquilion Prime Large/Medium/Small 100/135 kV

  • April 4, 2018: Update dose database

    The following CT model filter / tube voltage data was added.
    ・Toshiba Aquilion 16 Large/Small 100/135 kV
    ・Toshiba Aquilion 64 Large/Small 100/135 kV
    ・Toshiba Aquilion CXL Large/Small 100/135 kV
    ・GE LightSpeed16 Large/Small 100 kV
    ・GE LightSpeed Ultra Large/Small 100 kV
    ・GE DiscoveryCT750HD Large/Medium/Small 140 kV
    ・GE RevolutionHD Large/Medium/Small 140 kV
    ・GE OptimaCT660 Large/Small 120 kV
    ・GE RevolutionEVO Large/Small 120 kV
    ・Siemens Sensation64 Standard 100 kV

    The CTDI value of the following CT model was corrected.
    ・Toshiba Aquilion 64
  • January 23, 2018: Correction of dose database

    A problem that can not calculate the following conditions has been solved.
    CT model: Toshiba
    Filter: Medium
    Tube potential: 120 kV
    Gender: female
    Phantom: standard
  • November 30, 2017: Out of service due to syste maintenance

    Sorry for out of service due to system maintenance at the followoing date and time.
    December 19th 10:00 ~ 16:00
  • November 29, 2017: Out of service due to syste maintenance

    Sorry for out of service due to system maintenance at the followoing date and time.
    November 29th 12:00 ~ 30th 13:00 (plnned)
  • September 27, 2017: Out of service due to syste error

    Sorry for out of service due to system error from September 25.
    We are currently undergoing system rcovery work.
    * WAZA-ARI system was successfully restored at 17:15.
  • September 1, 2017: English HP open



System information (April 1, 2019)
・Dose Database Version 20190401
・WAZA-ARI system Version 2.5.5.2
・Number of users 2,077

CONTACT WAZA-ARI v2

WAZA-ARI Development Group
E-mail:


Privacy PolicyWAZA-ARI v2

Privacy Policy

User Manual

(Japanes Only yet)WAZA-ARI v2

WAZA-ARI v2 UserManual
Appendix: Parameters