A Study of the Radiation Dose Received by Patients to the Lens of Eye from Brain CT with 64 and 128 Slice CT Systems

Authors

  • Saimai Siangyai Department of Radiological Technology, Faculty of Medicine Vajira Hospital, Navamindradhiraj University, Bangkok
  • Cheewaporn Thanasombatsakul Department of Radiological Technology, Faculty of Medicine Vajira Hospital, Navamindradhiraj University, Bangkok
  • Nattamon Tepyuha Department of Radiological Technology, Faculty of Medicine Vajira Hospital, Navamindradhiraj University, Bangkok
  • Panatsada Awikunprasert Department of Radiological Technology, Faculty of Medicine Vajira Hospital, Navamindradhiraj University, Bangkok
  • Patamaporn Molee Department of Radiological Technology, Faculty of Medicine Vajira Hospital, Navamindradhiraj University, Bangkok
  • Kan Radeesree Department of Radiology, Faculty of Medicine Vajira Hospital, Navamindradhiraj University, Bangkok
  • Tanapol Dachviriyakij Ionising Radiation Metrology Group, Office of Atoms for Peace, Bangkok

Keywords:

radiation dose, lens eye, computed tomography, OSL nanodot

Abstract

Background and Objective: Brain scans using computed tomography can help to visualize abnormalities and the internal details of organ structure. However, the use of X-rays may have an effect on the lens of eye, which is a radiosensitive tissue. The goal of this study was to measure the radiation dose at the lens of patient's eyes during a computed tomography examination.
Methods: An optically stimulated luminescence dosimeters (OSL) nanoDot detector was attached to both eyelids of patients who underwent 64 slices CT brain scanner (n=19) and 128 slices CT brain scanner (n=19) to measure the radiation dose of the patient's eye lens.
Results: The mean radiation doses to the left and right eye lenses from a 64 slices CT scanner were 31.964 mGy and 31.913 mGy, respectively. The mean radiation doses from a 128 slices CT scanner for the left and right eye lenses were 33.237 mGy and 32.929 mGy, respectively. It was found that the radiation doses to eye lens from both sides were not significantly different (p<0.01). The radiation dose does not exceed the minimum threshold for cataract formation (500 mGy) and the lens opacity (500 - 2000 mGy).
Conclusions: The mean radiation dose delivered to patients' eye lenses during 64-slice and 128-slice CT brain examinations does not exceed the minimum threshold for cataracts or lens opacity. The use of radiation shielding should not obscure the organ to be imaged.

References

Omer H, Alameen S, Mahmoud WE, Sulieman A, Nasir O, Abolaban F. Eye lens and thyroid gland radiation exposure for patients undergoing brain computed tomography examination. Saudi J Biol Sci. 2021;28(1):342-6.

Adult Routine Head CT Protocols 2.0. Approved by American Association of Physicists in Medicine on March 1, 2016. American Association of Physicists in Medicine. [Cited May 2, 2022]. Available from: https://www.aapm.org/ pubs/ctprotocols/documents/adultroutineheadct.pdf

Jaffe TA, Hoang JK, Yoshizumi TT, Toncheva G, Lowry C, Ravin C. Radiation dose for routine clinical adult brain CT: Variability on different scanners at one institution. Am J Roentgenol 2010;195(2):433-8.

Julien S, Mueangsawang S. Assessment of radiation dose in computed tomography for routine brain and abdomen examinations. J Health Sci 2017;22(6):1035-41.

Gu J, Shi HS, Han P, Yu J, Ma GN, Wu S. Author Correction: Image quality and radiation dose for prospectively triggered coronary CT Angiography: 128-slice single-source CT versus first-generation 64-slice dual-source CT. Sci Rep 2020;10(1):11619.

Stewart FA, Akleyev AV, Hauer-Jensen M, Hendry JH, Kleiman NJ, MacVittie TJ, et al. ICRP PUBLICATION 118: ICRP Statement on tissue reactions and early and late effects of radiation in normal tissues and organs — Threshold doses for tissue reactions in a radiation protection context. Ann of the ICRP 2012;41(1-2):1-322.

ICRP. 2012 ICRP Statement on tissue reactions / early and late effects of radiation in normal tissues and organs – Threshold doses for tissue reactions in a radiation protection context. ICRP Publication 118. 2012;41.

Alwasiah R, Jawhari A, Orri RA, Khafaji M, Al Bahiti S. Measurement of radiation dose to the eye lens in non-enhanced CT scans of the brain. Radiat Prot Dosimetry 2021;195(1):56-60.

Kuepitak K, Thananon J, Awikunprasert P, Sangsawang S, Rueangsitrakoon J, Pungkun V, et al. The study of radiation dose and radiation scattering from computed tomography in a model. J Med Health Sci 2019;26(1).

Phaorod J, Wongsanon W, Hanpanich P, Dornsrichan P, Awikunprasert P, Sriwicha J, et al. The Measurement radiation doses to the lens of eye and thyroid gland from computed tomography brain scans and radiation dose around in CT scan room: phantom study. Srinagarind Med J 2020;35(2):153-60.

Published

2022-10-19

How to Cite

1.
Siangyai S, Thanasombatsakul C, Tepyuha N, Awikunprasert P, Molee P, Radeesree K, Dachviriyakij T. A Study of the Radiation Dose Received by Patients to the Lens of Eye from Brain CT with 64 and 128 Slice CT Systems . SRIMEDJ [Internet]. 2022 Oct. 19 [cited 2024 Jun. 15];37(5):552-6. Available from: https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/254814

Issue

Section

Original Articles