Assessment of Radiation Dose to the Lens of the Eye and Thyroid of Patients Undergoing Head and Neck Computed Tomography at Five Hospitals in Mashhad, Iran

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BAHREYNI TOOSSI MOHAMMAD TAGHI; Zare Hoda; ESLAMI ZAHRA; BAYANI SHAHRAM; Daneshdoost Mohammad; Zarif Ghasemian Said; Sedighpour Mehdi; Mohammadian Nastaran; HASHEMI SEYED MOHAMMAD; Khani Afsaneh

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Journal: IRANIAN JOURNAL OF MEDICAL PHYSICS Year:2018 | Volume:15 | Issue:4 Page(s): 226-230

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Title

Assessment of Radiation Dose to the Lens of the Eye and Thyroid of Patients Undergoing Head and Neck Computed Tomography at Five Hospitals in Mashhad, Iran

Author(s)

Keywords

Adults

Computed Tomography

Dosimetry

Eyes

Thermoluminescent

Pediatrics

Thyroid

Abstract

Introduction: In recent years, the number of Computed Tomography (CT) scans, which is a high-dose technique, has increased significantly. Head and neck CT is performed frequently and Thyroid, particularly in children, has always been considered a sensitive organ. In recent years, radiobiologists and health physicists have been more concerned about the safety of lenses of the Eyes, as cataract is no longer considered a deterministic effect. Material and Methods: In the present study, incurred doses to the Thyroid and lens of the eye of 140 patients who underwent common head and neck CT at five hospitals were measured by Thermoluminescent dosimeters (TLD-100). The patients were divided into two age groups of Pediatrics and Adults. TLD chips were placed on the patient’ s skin surface. For each patient, scan parameters, sex and age were recorded. Exposed TLDs were read by a manual TLD reader. Results: The average absorbed dose of the Thyroid, as well as the lenses of the left and right Eyes were 5. 89± 1. 74, 15. 84± 2. 81 and 16. 25± 2. 57, respectively, for the pediatric patients and 5. 00± 1. 17, 17. 64± 1. 69 and 24. 41± 1. 89 for Adults. Patient-specific organ doses were influenced by the scanned region, scan protocol and patient's age. Conclusion: In the present study, the mean eye dose was much lower than the 500 mGy threshold recommended by International Commission on Radiological Protection (ICRP) for lens of the eye damage, thus, it appears to be clinically safe. While CT scan remains a crucial tool, further dose reduction can be achieved by controlling different factors affecting patient doses.

Cites

Thyroid Cancer Risk in Patients Undergoing 64 Slice Brain and Paranasal Sinuses Computed Tomography

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APA: Copy

BAHREYNI TOOSSI, MOHAMMAD TAGHI, Zare, Hoda, ESLAMI, ZAHRA, BAYANI, SHAHRAM, Daneshdoost, Mohammad, Zarif Ghasemian, Said, Sedighpour, Mehdi, Mohammadian, Nastaran, HASHEMI, SEYED MOHAMMAD, & Khani, Afsaneh. (2018). Assessment of Radiation Dose to the Lens of the Eye and Thyroid of Patients Undergoing Head and Neck Computed Tomography at Five Hospitals in Mashhad, Iran. IRANIAN JOURNAL OF MEDICAL PHYSICS, 15(4), 226-230. SID. https://sid.ir/paper/719947/en

Vancouver: Copy

BAHREYNI TOOSSI MOHAMMAD TAGHI, Zare Hoda, ESLAMI ZAHRA, BAYANI SHAHRAM, Daneshdoost Mohammad, Zarif Ghasemian Said, Sedighpour Mehdi, Mohammadian Nastaran, HASHEMI SEYED MOHAMMAD, Khani Afsaneh. Assessment of Radiation Dose to the Lens of the Eye and Thyroid of Patients Undergoing Head and Neck Computed Tomography at Five Hospitals in Mashhad, Iran. IRANIAN JOURNAL OF MEDICAL PHYSICS[Internet]. 2018;15(4):226-230. Available from: https://sid.ir/paper/719947/en

IEEE: Copy

MOHAMMAD TAGHI BAHREYNI TOOSSI, Hoda Zare, ZAHRA ESLAMI, SHAHRAM BAYANI, Mohammad Daneshdoost, Said Zarif Ghasemian, Mehdi Sedighpour, Nastaran Mohammadian, SEYED MOHAMMAD HASHEMI, and Afsaneh Khani, “Assessment of Radiation Dose to the Lens of the Eye and Thyroid of Patients Undergoing Head and Neck Computed Tomography at Five Hospitals in Mashhad, Iran,” IRANIAN JOURNAL OF MEDICAL PHYSICS, vol. 15, no. 4, pp. 226–230, 2018, [Online]. Available: https://sid.ir/paper/719947/en

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