محافظت پستان از آسیب تشعشع با استفاده از شیلد های نانو بیسموت در سی تی اسکن قفسه سینه

محنتی, پریناز and یوسفی سوته, محمد and ملک زاده, رضا and دیوبند, بهارک and رفاهی, سهیلا (1397) محافظت پستان از آسیب تشعشع با استفاده از شیلد های نانو بیسموت در سی تی اسکن قفسه سینه. Crescent Journal of Medical and Biological Sciences ــ 6 (1). pp. 46-50. شاپا 2148-9696


Official URL: http://cjmb.org/text.php?id=242


Breast Conservation From Radiation Damage By Using Nano Bismuth Shields In Chest CT Scan

English Abstract

Objectives: The present study aimed to calculate the efficiency of bismuth nanoparticles shield to protect the breast in chest computed tomography (CT) scan and investigate the alteration of image quality after using the shield. Materials and Methods: Three groups were included in this experimental research in which phantom was scanned without using nano bismuth shield (group 1), using 0.5 mm nano bismuth shield (group 2), and employing nano bismuth shield with 1 mm thickness (group 3). The polymethyl methacrylate phantom was applied to present the main organ of the chest including the breast and lung. Multi-detector 6-slice CT scan system was utilized for the tests. In addition, the breast radiation dose was measured by ion-chamber which was placed at 12 o"clock position in the phantom according to dosimetry protocol. Further, chest CT image processing was performed once without shield and once in the presence of 10% nano bismuth shield with different thicknesses. Finally, image quality was compared by adding the shield for correct diagnosis. Tests were repeated three time and data were analyzed by ANOVA. Results: Based on the results, using nano bismuth shields, breast dose reduced by 7.2% and 13.8% for 0.5 and 1 mm thickness of the shield, respectively. Furthermore, the CT number and noise increased from 121.3 to 126.36 HU and from 24.53 to 28.1 HU, respectively. Finally, the dose reduction ratio approximately doubled by increasing the thickness from 0.5 to 1 mm. Conclusions: Generally, nano bismuth shields have a noticeable potential for reducing the breast dose with the smallest change in the noise.

Item Type:Article
زبان سند : انگلیسی
نویسنده اول :پریناز محنتی
نویسنده مسئول :محمد یوسفی سوته
نویسنده :رضا ملک زاده
نویسنده :بهارک دیوبند
نویسنده :سهیلا رفاهی
Additional Information:Indexed in: ESCI, Chemical abstracts, Embase, DOAJ, EBSCO, Google Scholar, SID, ISC, Magiran
کلیدواژه ها (انگلیسی):Nano Bismuth, shields, Dose reduction, chest CT, Image quality
Subjects:WN Radiology . Diagnostic Imaging
Divisions:Faculty of Medicine > Department of Basic Sciences > Department of Medical Physics
ID Code:10232
Deposited By: MS Soheila Refahi
Deposited On:21 Nov 1397 13:09
Last Modified:21 Nov 1397 13:09

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