Bismuth ct breast shielding debates

The main goal of this study was to assess the viability of the bismuth breast shield in chest computed tomography CT examinations. Dose measurements on a phantom Cardinal Health 76 with an ionisation chamber were performed with and without bismuth breast protection in different configurations using the routine chest CT protocol. Image quality control was performed using a phantom Gammex In all measurements with bismuth protection no sponges , we observed a dose decrease of Dose decreased by It is therefore appropriate to implement the protection configuration coupled to the gantry as a protective measure for patients undergoing chest CT scans.

Background: The main problem with coronary computed tomography angiography CCTA scan is the extreme exposure of patients during imaging. Bismuth belt shield is a new design to minimize the received dose in CCTA. Objectives: The purpose of this study was to design and construct new bismuth-silicon composite shields to reduce the risk of ionizing radiation during CCTA, along with an examination of the diagnostic capability of the image for the physician. Materials and Methods: Dose reduction was calculated by placing thermoluminescent dosimeters TLDs in skin and glandular position for breast dose measuring in the multi detector CT. Image quality was assessed by CT numbers and noise evaluation. Results: The breasts recorded dose without using shield were 7 - 8. There was a significant relationship between the reduction of breast doses and the thickness of the shields, bismuth weight percentage, the size of the breast and the dosimetry in the skin or gland.

Language: English Portuguese. Several studies have been published regarding the use of bismuth shielding to protect the breast in computed tomography CT scans and, up to the writing of this article, only one publication about barium shielding was found. The present study was aimed at characterizing, for the first time, a lead breast shielding.

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