Lead-rubber shielding effect on radiation dose to the gonads from a bilateral hand X-ray examination
Journal article
Welborn, D. and Lockwood, P. 2022. Lead-rubber shielding effect on radiation dose to the gonads from a bilateral hand X-ray examination. Radiography. 28 (2), pp. 360-365. https://doi.org/10.1016/j.radi.2021.12.013
Authors | Welborn, D. and Lockwood, P. |
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Abstract | Introduction Recent guidance from the British Institute of Radiology (BIR) and the American Association of Physicists in Medicine (AAPM) focuses on cessation of patient Lead-rubber (Pb) shielding placed within the Field of View (FOV) that may influence image exposure or quality. Furthermore, the BIR assert shielding organs greater than 5 cm from the primary X-ray beam will have a negligible effect to the received radiation dose. Bilateral hand X-rays are frequently and repeatedly requested for the diagnosis and ongoing management of arthritic conditions. There is a lack of literature regarding the effect of Pb shielding during bilateral hand X-ray examinations. This research aimed to investigate the scattered secondary radiation dose to the gonads during a bilateral hand X-ray, with and without the use of Pb shielding outside the FOV at a greater distance than 5 cm from the primary beam. Methods Using an anthropomorphic phantom and constructed upper limbs, radiation was recorded to the male and female gonads. Thermoluminescent dosimeters (TLD's) (⅛" x ⅛" x 0.15″ TLD-100H) were placed in groups of three upon the testes and within the left and right ovary to record the ionising radiation dose. Three collimated exposures were completed using a standard clinical practice hand X-ray protocol of 60 kVp and 2.5 mAs with a source to image distance (SID) of 100 cm. The mean and standard deviation of the radiation dose was calculated for both with and without Pb shielding. A paired two-sample t-test was conducted to determine statistical significance (p ≤ 0.05). Results Data analysis demonstrated dose measured to the testes of 5.3 μGy (SD 0.8) without Pb shielding and 2.3 μGy (SD 0.2) with Pb (reduction of 3 μGy; 56.6%). Left ovary doses measured 40.6 μGy (SD 1.2) without Pb shielding and 28.8 μGy (SD 1.7) with Pb (reduction of 11.9 μGy; 29.2%) and right ovary doses measured 39.5 μGy (SD 1.9) without Pb shielding and 26.6 μGy (SD 1.0) with Pb (reduction of 12.8 μGy; 32.4%). The paired two-sample t-test presented a statistically significant dose reduction (p = 0.0039). Conclusion The study demonstrated dose limitation from scattered secondary radiation to the gonads when Pb shielding was used during a bilateral hand X-ray at distances greater than 5 cm from the primary X-ray beam on anatomy outside the FOV. Implications for practice The use of Pb shielding over the gonad area during a bilateral hand X-ray examination aligns to ALARP best practice and provides prospects for patient (male and female) dose reduction. |
Keywords | General radiography ; Radiation protection; Gonads ; Scatter radiation; Lead contact shielding |
Year | 2022 |
Journal | Radiography |
Journal citation | 28 (2), pp. 360-365 |
Publisher | Elsevier |
ISSN | 10788174 |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.radi.2021.12.013 |
Official URL | https://www.radiographyonline.com/article/S1078-8174(21)00213-3/fulltext |
Publication dates | |
Online | 12 Apr 2022 |
Publication process dates | |
Deposited | 10 Jan 2022 |
Accepted | 22 Dec 2021 |
Accepted author manuscript | File Access Level Open |
Output status | Published |
References | 1. Farr RF, Allisy-Roberts PJ, Physics for medical imaging. 1997. Saunders Company. |
Additional information | Publications router: Date 2021-12-22 of type 'accepted_date' included in notification. |
Publications router: License for AM version of this article starting on 2023-04-12: http://creativecommons.org/licenses/by-nc-nd/4.0/ included in notification | |
License | http://creativecommons.org/licenses/by-nc-nd/4.0/ |
https://repository.canterbury.ac.uk/item/8zz7w/lead-rubber-shielding-effect-on-radiation-dose-to-the-gonads-from-a-bilateral-hand-x-ray-examination
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