THYROID EXPOSURE IN BRAIN CT-SCAN AND SKULL X-RAY, USING DIFFERENT LEVELS OF MA AND KVP WITH AND WITHOUT THYROID SHIELD

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SAEB M.; FATEHI D.

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Journal: JOURNAL OF SHAHREKORD UNIVERSITY OF MEDICAL SCIENCES Year:2011 | Volume:13 | Issue:2 Page(s): 19-25

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Title

THYROID EXPOSURE IN BRAIN CT-SCAN AND SKULL X-RAY, USING DIFFERENT LEVELS OF MA AND KVP WITH AND WITHOUT THYROID SHIELD

Author(s)

SAEB M. | FATEHI D. | Issue Writer Certificate

Keywords

BRAIN CT-SCANQ2

DOSIMETERYQ2

KVPQ2

MAQ2

SKULL X-RAYQ2

TLDQ2

THYROIDQ2

Abstract

Background and aim: Nowadays, thyroid exposure is a major concern in skull radiological imaging. The aim of this study was to evaluate thyroid exposure in brain CT-scan and skull X-ray, using different levels of Kvp (Kilovoltd peak) and mA, with and without thyroid shield.Methods: In this descriptive- analytic study, 350 outpatients were selected randomly. Two TLD-100 chips (Thermo Luminescence Dosimeter) were placed on the thyroid of each patient. Three levels of mA were applied in brain CT-scan (210 patients) and two levels of Kvp were used in routine skull X-rays (140 patients). The experiments were performed with and without thyroid shield. The TLDs were read and the statistical analysis was performed using student-t test.Results: During brain CT-scan, decreasing current intensity from 150 to 125 mA, significantly decreased the thyroid exposure from 101±9.38 to 82.2±8.04 mili rem (P<0.01). Using a thyroid shield extremely reduced the thyroid exposure to 29±5.83 mili rem (P<0.01). In routine skull x-rays, increasing voltage from 60 to70 Kvp, significantly decreased the thyroid exposure from 72.6±7.74 to 67±8.41 mili rem (P<0.05). Moreover, using the thyroid shield remarkably reduced the thyroid exposure to 19.6±1.82 mili rem (P<0.05). Conclusions: Using lower levels of mA in brain CT-scans and higher levels of Kvp in skull X-rays, decrease thyroid exposure. Furthermore, using thyroid shield during X-ray examinations of the skull remarkably reduces thyroid exposure.

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APA: Copy

SAEB, M., & FATEHI, D.. (2011). THYROID EXPOSURE IN BRAIN CT-SCAN AND SKULL X-RAY, USING DIFFERENT LEVELS OF MA AND KVP WITH AND WITHOUT THYROID SHIELD. JOURNAL OF SHAHREKORD UNIVERSITY OF MEDICAL SCIENCES, 13(2), 19-25. SID. https://sid.ir/paper/58283/en

Vancouver: Copy

SAEB M., FATEHI D.. THYROID EXPOSURE IN BRAIN CT-SCAN AND SKULL X-RAY, USING DIFFERENT LEVELS OF MA AND KVP WITH AND WITHOUT THYROID SHIELD. JOURNAL OF SHAHREKORD UNIVERSITY OF MEDICAL SCIENCES[Internet]. 2011;13(2):19-25. Available from: https://sid.ir/paper/58283/en

IEEE: Copy

M. SAEB, and D. FATEHI, “THYROID EXPOSURE IN BRAIN CT-SCAN AND SKULL X-RAY, USING DIFFERENT LEVELS OF MA AND KVP WITH AND WITHOUT THYROID SHIELD,” JOURNAL OF SHAHREKORD UNIVERSITY OF MEDICAL SCIENCES, vol. 13, no. 2, pp. 19–25, 2011, [Online]. Available: https://sid.ir/paper/58283/en

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