Investigation of the suitability of new developed epoxy based-phantom for child's tissue equivalency in paediatric radiology

다국어 초록 (Multilingual Abstract)

In this study, tissue equivalency (TE) of a newly developed epoxy-based phantom to 3e5 years child'stissue was investigated in paediatric energy range. Epoxy-based TE-phantoms were produced at differentglandular/adipose (G/A) ratios of 17/83%, 31/69%, 36/64% and 10/90%. A procedure was developed inwhich specific amounts of boron, calcium, magnesium, sulphur compounds are mixed with epoxy resin,together with other minor substitutes. In paediatric energy range of 40e60 kVp half-value layer (HVL)values were measured and then Hounsfield Units (HU) were determined from Computed Tomography(CT) scans taken in the X-ray energy range of 80-120kVp. It is found that radiation absorptionproperties of these phantoms in terms of the measured HVL values related to linear attenuation coefficients (m) are very well mimicking a 3 years child's soft tissue in case a ratio of 10/90%G/A. Additionally, the HU values of phantoms were determined from the CT scans. The HU ¼ 47.8 ± 4.8 value wasfound for the epoxy-based phantom produced at a ratio of 10/90%G/A. The obtained HVL and HU valuesalso support the suitability of the new epoxy based-phantom produced at a ratio of 10/90%G/A for asatisfactory mimicking a 3 years child's soft tissue by 5%. Thus they can have a potential use to performthe quality controls of medical X-ray systems and dose optimization studies

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