Size-Specific Dose Estimation In the Korean Lung Cancer Screening Project: Does a 32-cm Diameter Phantom Represent a Standard-Sized Patient in Korean Population?

Kim, Eun Young; Kim, Tae Jung; Goo, Jin Mo; Kim, Hyae Young; Lee, Ji Won; Lee, Soo-Jung; Lim, Jae Min; Kim, Yeol

doi:10.3348/kjr.2018.19.6.1179

Cited by 13 publications

(9 citation statements)

References 10 publications

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“…A previous study had observed that when the automated exposure control (AEC) system was deployed, both CTDIvol and SSDE values were higher in large-sized subjects than those who were standard-sized. When the AEC system was turned off, there seems to be no significant difference between the radiation doses in different subject sizes [12]. This observation was aligned with in this study where the AEC was deployed.…”

Section: Discussionsupporting

confidence: 86%

Patient-Specific Radiation Dose and Cancer Risk Estimate in Computed Tomography Pulmonary Angiography Examinations Based on Lung Effective Diameter

Harun¹,

Karim²,

Abbas³

et al. 2019

Preprint

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Computed Tomography (CT) scan examinations has greater demands especially in CT Pulmonary Angiography (CTPA) owing to the public and radiology personnel worries towards CT radiation exposure and risks. The aim of present study is to evaluate the comprehensive radiation exposure in computed tomography pulmonary angiography (CTPA) and its cancer risk. The records of 100 patients who had undergone CTPA were retrieved. The radiation dose exposure, scanning acquisition protocol as well as patient characteristics were noted. Radiation exposure were presented as Volume Computed Tomography Dose Index (CTDIvol), Size-Specific Dose Estimate (SSDE), Dose-Length Product (DLP), and effective dose (E) and organ dose. Effective cancer risk per million procedure was calculated by referring to the International Commission on Radiological Protection Publication 103. The CTDIvol, SSDE, DLP were comparable within different effective diameter groups. The average effective dose received by a patient was 8.68 mSv. The organ dose and effective cancer risk attained for breast, lung and liver were 17.05 ± 10.40 mGy (194 per one million procedure), 17.55 ± 10.86 mGy (192 per one million procedure) and 15.04 ± 9.75 mGy (53 per one million procedure), respectively. In conclusion, CTDIvol was undervalued and SSDE was more accurate in describing radiation dose exposure. The lungs and breast of subjects with large effective diameter were higher risk of developing cancer as they received the highest exposure. Therefore, extra safety measures should be considered for large-sized patients undergoing CTPA.Purpose: This study evaluates the comprehensive radiation exposure in computed tomography pulmonary angiography (CTPA) and its cancer risk.

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Section: Discussionsupporting

confidence: 86%

Patient-Specific Radiation Dose and Cancer Risk Estimate in Computed Tomography Pulmonary Angiography Examinations Based on Lung Effective Diameter

Harun¹,

Karim²,

Abbas³

et al. 2019

Preprint

View full text Add to dashboard Cite

show abstract

“…A previous study had observed that when the automated exposure control (AEC) system was deployed, both CTDIvol and SSDE values were higher in large-sized subjects than those who were standard-sized. When the AEC system was turned off, there seems to be no significant difference between the radiation doses in different subject sizes [13]. This observation was aligned with this study where the AEC was deployed.…”

Section: Discussionsupporting

confidence: 84%

Radiation Doses and Cancer Risk from CT Pulmonary Angiography Examinations

Harun¹,

Karim²,

Abbas³

et al. 2019

Preprint

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The present study aims to investigate radiation doses from Computed Tomography Pulmonary Angiography (CTPA) examinations based on the patient’s size and to estimate the probability of cancer risk induced from the examination. Data from 100 patients who had undergone CTPA examinations, such as scanning acquisition parameters, patient demography, as well as radiation dose exposure, were collected and analysed. All subjects which aged above 18 y/o were scanned using a Philips Brilliance 128 multi-detector CT (MDCT) scanner. The mean dose value for Volume Computed Tomography Dose Index (CTDIvol), Dose-Length Product (DLP) and effective dose (E) were 11.06 ± 7.17 mGy, 400.38 ± 259.10 mGy.cm and 8.68 ± 5.47 mSv respectively. In addition, with respective of patient’s effective diameter, the mean SSDE value for Group 1, Group 2 and Group 3 were 9.93 ± 3.89, 13.70 ± 9.04 and 22.29 ± 7.35, respectively. Cancer risk per million procedure was calculated based on te recommendation by the International Commission on Radiological Protection Publication 103 report. The organ dose and cancer risk attained for breast, lung and liver were 17.05 ± 10.40 mGy (194 per one million procedure), 17.55 ± 10.86 mGy (192 per one million procedure) and 15.04 ± 9.75 mGy (53 per one million procedure), respectively. In conclusion, CTDIvol underestimated, and SSDE was more accurate in describing the radiation dose. Lung and breast with larger lung effective diameter received the highest dose exposure which increase the probability of the cancer risk. Therefore, it is important to apply optimised protocols in order to reduce patient’s exposure during CTPA examination.

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“…A previous study had observed that when the automated exposure control (AEC) system was deployed, both CTDIvol and SSDE values were higher in large-sized subjects than those who were standard-sized. When the AEC system was turned off, there seems to be no significant difference between the radiation doses in different subject sizes (Kim et al, 2018). This observation was aligned with this study, where the AEC was deployed.…”

Section: Patient Characteristic and Radiation Dosesupporting

confidence: 85%

Association of Radiation Doses and Cancer Risks from CT Pulmonary Angiography Examinations in Relation to Body Effective Diameter

Harun¹,

Karim²,

Abbas³

et al. 2020

Preprint

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This study aims to evaluate the patient's dose exposure from Computed Tomography Pulmonary Angiography (CTPA) examination and to estimates the cancer risk induced from the examinations based on the patient's size. One hundred patients were recruited, and data information was collected retrospectively. A multi-detector (MDCT) (Philips Brilliance 128, USA) scanner were utilized for the CTPA examination, and dose data were obtained from the system. The effective diameter of each subjects' image was measured for the Size-specific dose estimates (SSDEs). All subjects divided into Group 1 (19 -25 cm), Group 2 (25-28 cm) and Group 3 (28-38 cm), where the association between gender were analysed.Effective dose (E), SSDE, organ dose and cancer risk of each group were evaluated and compared statistically using independent t-test and one-way ANOVA. The range of mean CTDIvol, DLP and E values were (6.44 -17.42 mGy), (239 -631 mGy), (5.19 -13.90 mSv), respectively. In respective with the patient's effective diameter, the mean SSDE value for Group 1, Group 2 and Group 3 were 9.93 ± 3.89 mGy, 13.70 ± 9.04 mGy and 22.29 ± 7.35 mGy. The organ dose and cancer risk attained for breast, lung and liver were 17.05 ± 10.40 mGy (194 per one million procedure), 17.55 ± 10.86 mGy (192 per one million procedure) and 15.04 ± 9.75 mGy (53 per one million procedure), respectively. Lung and breast with more massive patient's effective diameter received the highest dose exposure which increases the probability of the cancer risk. CTDIvol was found to be underestimated, and SSDE provides more accurate in describing the radiation dose and cancer risk. Body effective diameter found to be significant on the estimation except for gender. Therefore, it is essential to apply optimised protocols in order to reduce patient's exposure during CTPA examination.

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Size-Specific Dose Estimation In the Korean Lung Cancer Screening Project: Does a 32-cm Diameter Phantom Represent a Standard-Sized Patient in Korean Population?

Cited by 13 publications

References 10 publications

Patient-Specific Radiation Dose and Cancer Risk Estimate in Computed Tomography Pulmonary Angiography Examinations Based on Lung Effective Diameter

Patient-Specific Radiation Dose and Cancer Risk Estimate in Computed Tomography Pulmonary Angiography Examinations Based on Lung Effective Diameter

Radiation Doses and Cancer Risk from CT Pulmonary Angiography Examinations

Association of Radiation Doses and Cancer Risks from CT Pulmonary Angiography Examinations in Relation to Body Effective Diameter

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