Dosimetry Output of CT-Expo and WAZA-ARI in Different Acquisition Parameter of CT Abdomen-Pelvis Examination: A Comparative Study

  • M. K. Abdul Karim Department of Physics, Universiti Putra Malaysia
  • A. H. Nazari
  • S. S. Said Rahmat
  • S. Omar Baki

Abstract

This study aimed to evaluate radiation doses of Computed Tomography Abdomen-Pelvis (CT AP) examinations after implementing optimization protocols and to compare the value of organ equivalent dose (D) and E (E) obtain from both CTExpo (Ver. 2.5, German) and WAZA-ARI (Japan). Six CT AP protocols, one routine (R1) and five modified protocols (R2 to R6) were scrutinize on various CT scanner Canon Aquilion 64-slice (Japan), Siemens Sensation 16 (German) and Siemens Sensation 64 (German). The differences of E value between WAZA ARI and CT-Expo for scanning region between 20 cm to 50 cm were estimated. Furthermore, six organs equivalent dose; lung, liver, gall bladder, gonad or testicles, kidney and stomach were determined and the differences of organ dose between both dose calculators with different CT scanner were analyzed. The highest variation of E between CT-Expo and WAZA ARI is about 27% with average differences observed is around 21%. In term of scanning range, WAZA ARI reported to have large variation of E when compared to CT-Expo. Between different CT scanner, stomach indicate highest D with 80.3 mGy in Canon Acquilion. There was a slight difference between the two softwares but WAZA ARI had overall gave higher reading of E compared to CT-Expo. Our results show that increasing tube potential and reducing pitch factor may increase radiation dose and as increasing scan range of examination also elevate the amount of radiation dose.

Published
2021-12-29
How to Cite
ABDUL KARIM, M. K. et al. Dosimetry Output of CT-Expo and WAZA-ARI in Different Acquisition Parameter of CT Abdomen-Pelvis Examination: A Comparative Study. Physics and Technology in Medicine, [S.l.], v. 2, n. 1 & 2, p. 42-50, dec. 2021. ISSN 2710-723X. Available at: <https://myjms.mohe.gov.my/index.php/ptm/article/view/15022>. Date accessed: 28 may 2022.