A web-based CT dose calculator

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

• (Important) April 1, 2025: Temporary suspension of the WAZA-ARI system

  The WAZA-ARI system is scheduled to be re-launched in June 2025.

• (Important) Nobember 29, 2024: Temporary suspension of the WAZA-ARI system

  The date for suspending system use has been changed to 10 December 2024.

• (Important) October 18, 2024: Temporary suspension of the WAZA-ARI system and deletion of user data

  The WAZA-ARI system will be suspended from 27th December 2024 for the migration of the server and major system improvements. The new system is scheduled to be released in April 2025 or later.
  The new system will no longer require users to log in using their user ID, and it will be possible to calculate doses without logging in. Due to the removal of the user ID management function, previously registered user information and registered dose calculation history will also be deleted. If you need the data for your currently registered dose calculation history, please download it by 27 December.

• July 10, 2024: Update dose database

  The following CT model filter / tube voltage data was added
  ・Siemens SOMATM Drive Standard 70/80/90/100/110/120/130/140 kV

• June 2, 2023: Update dose database

  The following CT model filter / tube voltage data was added
  ・Canon Aquilion Serve Large/Mediuml 80/100/120/135 kV
  ・Canon Aquilion Lightning Helios Large/Medium 80/100/120/135 kV
  

• June 1, 2022: Update dose database

  The following CT model filter / tube voltage data was added
  ・Canon AquilionONE PRISM Large/Mediuml/80/100/120/135 kV
  ・Siemens Confidence Standard 70/80/100/120/140 kV
  

• May 1, 2022: Out of service due to syste maintenance (post-report)

  Sorry for out of service due to system maintenance at the followoing date and time.
  December 15 ~ Febrary 28
  
  

• November 16, 2021: Out of service due to syste maintenance

  Sorry for out of service due to system maintenance at the followoing date and time.
  December 5, 13:00 ~ 17:00 (JST)
  
  

• March 15, 2021: New functions released

  The following CT model filter / tube voltage data was added
  (1) BMI-based organ dose calculation; height and weight are necessary for this function
  (2) SSDE calculation; anterior-posterior dimension and lateral dimension of a patient are necessary for this function.
  

• Novemver 19, 2019: Update dose database

  The following CT model filter / tube voltage data was added
  ・GE Revolution GSI Large/Medium/Small 80/100/120/140 kV
  ・Canon Aquilion Prime SP Large/Small 80/100/120/135 kV
  

• November 11, 2019: Out of service due to syste maintenance

  Sorry for out of service due to system maintenance at the followoing date and time.
  November 12, 12:00 ~ 13:00 (JST)
  
  

• November 11, 2019: Out of service due to syste maintenance

  Sorry for out of service due to system maintenance at the followoing date and time.
  November 12, 12:00 ~ 13:00 (JST)
  
  

• August 30, 2019: Update dose database

  The following CT model filter / tube voltage data was added
  ・GE Revolution CT Large/Medium/Small 70/80/100/140 kV
  ・Hitachi SCENARIA View Normal/Small 80/100/120/140 kV
  ・Philips IQon Spectral CT Medium 80/140 kV
  

• June 10, 2019: Update dose database

  The following CT model filter / tube voltage data was added
  ・GE Revolution CT Large/Small 120 kV
  ・Canon Aquilion ONE GENESIS Large/Medium 135 kV
  ・Canon Aquilion ONE NATURE Large/Medium 135 kV
  ・Hitachi SCENARIA EX Normal/Small 80/100/120/140 kV
  ・Philips IQon Spectral CT Medium 100 kV
  
  

• 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