An Assessment of Entrance Surface Dose Using the nanoDot Dosimeter

김종언,; 임인철,; 박철우,

doi:10.7742/jksr.2011.5.6.377

Journal of the Korean Society of Radiology

2011

DOI: 10.7742/jksr.2011.5.6.377

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An Assessment of Entrance Surface Dose Using the nanoDot Dosimeter

김종언 김종언¹,

임인철 임인철²,

박철우 박철우³

Abstract: The purpose of this study is an assessment between the measured value of the nanoDot dosimeter and the calculated value of Non Dosimeter Dosimetry-Method(NDD-M) for entrance surface dose in general radiography. Measurement and calculation of the entrance surface doses were performed for head(AP), abdomen(AP), pelvis(AP), thoracic spine(AP) and lumbar spine(AP). As a result, the relative ratios of the measured value to the calculated value were acquired 1.5-2.1 for each region. Reproducibility acquired 0.035 as… Show more

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Assessment of Radiation Dose Due to X-Ray Simple Series Examinations

Gang¹,

Hwang²,

Shin³

2014

Journal of the Korean Society of Radiology

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In diagnostic radiology, each part is examined through serial radiography in most cases of general radiography. However, the reality is that, as for diagnostic reference level, measured values have been set up only for AP projection of each part and lateral projection. In the clinical setting, cumulative dose is incurred by serial radiography of patients, and this can make comparison of diagnostic reference level and cumulative exposure dose impossible or can lead to underestimation of diagnostic reference level. In this study, measurement of cumulative dose of serial radiography of each part revealed that when converting entrance surface dose to effective dose in case it is included in the exposure field, cumulative dose measured from a maximum of 38.06% to a minimum of 0.23% of individual dose limitation of the public. Also, when converting entrance surface dose of each part that is not included in the exposure field into effective dose, it measured from a maximum of 5% to a minimum of 0.04% of individual dose limitation of the public. Results of this study show entrance surface dose substantially increases in serial radiography of each part. Therefore, it is deemed that hospitals need to establish diagnostic reference level specifically, and subdivision of radiography orders for patients is also required in order to reduce unnecessary inspections. Moreover, the need of accurate exposure field is emphasized in case of inspection of several parts.

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Assessment of Radiation Dose Due to X-Ray Simple Series Examinations

Gang¹,

Hwang²,

Shin³

2014

Journal of the Korean Society of Radiology

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Dose Evaluation Using Mathematical Simulation of Radiation Exposure Body in Mammography System

Lee¹

2014

Journal of the Korean Society of Radiology

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Mammography is mostly performed by series projection on both breasts. While taking mammography, it is less than average glandular dose of 3 mGy which regulated. But mammography is exposed much more doses actually, due to additional or series projection. Also, it is difficult to recognize around organ dose except exposed breast. Using mathematical simulation of radiation exposure body in mammography, we studied around organ dose distribution by changing thickness(25, 30, 50 μm) of filter and relative absorption dose rate which set on basis of exposed breast. as a result, when setting of basis of exposed breast, dose of opposite breast is more affected approximately from 79.26 to 86.31%. when using 25 μm of filter thickness than 30 μm, 50 μm of filter thickness in Mo/Mo, W/Rh combination which used actually, absorbed dose rates for opposite breast and around organ were low.

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An Assessment of Entrance Surface Dose Using the nanoDot Dosimeter

Cited by 2 publications

References 3 publications

Assessment of Radiation Dose Due to X-Ray Simple Series Examinations

Assessment of Radiation Dose Due to X-Ray Simple Series Examinations

Dose Evaluation Using Mathematical Simulation of Radiation Exposure Body in Mammography System

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