Evaluation of Size-Specific Dose Estimates for Optimizing Pediatric Chest CT Protocol
Introduction: The importance of estimating patient-sized adjusted radiation dose for pediatric computed tomography (CT) has long been accepted. High doses of ionizing radiation to children are often common in chest CT examinations, as the volume CT dose index (CTDIvol) is measured by a 32 cm phantom...
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| Format: | Article |
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Mashhad University of Medical Sciences
2022-09-01
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| Series: | Iranian Journal of Medical Physics |
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| Online Access: | https://ijmp.mums.ac.ir/article_18925_37cbec0a349301549a50025be20dd56d.pdf |
| _version_ | 1797848978968018944 |
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| author | Fariba Zarei Mahdokht Nasiri Zahra Etemadi Rezvan Ravanfar Haghighi Sabysachi chatterjee Pouria Abdollahi Khaneghah Vani Vardhan Chatterjee |
| author_facet | Fariba Zarei Mahdokht Nasiri Zahra Etemadi Rezvan Ravanfar Haghighi Sabysachi chatterjee Pouria Abdollahi Khaneghah Vani Vardhan Chatterjee |
| author_sort | Fariba Zarei |
| collection | DOAJ |
| description | Introduction: The importance of estimating patient-sized adjusted radiation dose for pediatric computed tomography (CT) has long been accepted. High doses of ionizing radiation to children are often common in chest CT examinations, as the volume CT dose index (CTDIvol) is measured by a 32 cm phantom. Our study aimed to evaluate the effectiveness of size-specific dose estimate (SSDE) to compensate for the underestimated pediatric absorbed dose. Material and Methods: CTDIvol and dose-length product (DLP) of 320 pediatric chest CT (<1, 1-5, 5-10, 10-15 years) were obtained from Picture-Archiving and Communication System (PACS) in a hospital affiliated with the Shiraz University of Medical Sciences. CTDIvol was converted to SSDE based on the patient's effective diameter. The Statistical Package for Social Science (SPSS) was used for data analysis. Results: The variations between standard phantom (32cm) and the patients' mean effective diameter were approximately 65%, 57%, 47%, and 38%, across <1, 1-5, 5-10, 10-15 year age groups, respectively. The mean of SSDE for each age group was significantly higher than the corresponding CTDIvol values. Also, mean CTDIvol and SSDE values differed between age groups significantly (p<0.001). Results showed a strong correlation between age and the two-dose indicators, CTDIvol (0.361) and SSDE (0.184), with p<0.05. Conclusion: Pediatrics receive radiation doses comparable to the dose for adult-sized patients in chest CT protocol if the dosimetry procedure is not individualized. Thus, applying a size-based conversion coefficient is paramount in estimating the absorbed dose in pediatric chest CT. |
| first_indexed | 2024-04-09T18:36:23Z |
| format | Article |
| id | doaj.art-7659780a3f12486b8bb47d9cccad6f7f |
| institution | Directory Open Access Journal |
| issn | 2345-3672 |
| language | English |
| last_indexed | 2024-04-09T18:36:23Z |
| publishDate | 2022-09-01 |
| publisher | Mashhad University of Medical Sciences |
| record_format | Article |
| series | Iranian Journal of Medical Physics |
| spelling | doaj.art-7659780a3f12486b8bb47d9cccad6f7f2023-04-11T09:41:57ZengMashhad University of Medical SciencesIranian Journal of Medical Physics2345-36722022-09-0119531532110.22038/ijmp.2021.56852.195418925Evaluation of Size-Specific Dose Estimates for Optimizing Pediatric Chest CT ProtocolFariba Zarei0Mahdokht Nasiri1Zahra Etemadi2Rezvan Ravanfar Haghighi3Sabysachi chatterjee4Pouria Abdollahi Khaneghah5Vani Vardhan Chatterjee6Medical Imaging Research Center, Shiraz University of Medical Sciences, Shiraz, Iran Department of Radiology, School of Medicine, Shiraz University of Medical Sciences, Shiraz 7134845794, Iran.Department of Radiology, School of Medicine, Shiraz University of Medical Sciences, Shiraz 7134845794, Iran.Medical Imaging Research Center, Shiraz University of Medical Sciences, Shiraz 7134845794, IranMedical Imaging Research Center, Shiraz University of Medical Sciences, Shiraz, IranRetired Scientist from Indian Institute of Astrophysics, present affiliation: Ongil, 79 D3, Sivaya Nagar, Reddiyur Alagapuram, Salem 636004. IndiaDepartment of Radiology, Shiraz University of Medical Sciences, Shiraz 7134845794, IranDepartment of Instrumentation and Applied Physics, Indian Institute of Science, Bangalore 560012. INDIAIntroduction: The importance of estimating patient-sized adjusted radiation dose for pediatric computed tomography (CT) has long been accepted. High doses of ionizing radiation to children are often common in chest CT examinations, as the volume CT dose index (CTDIvol) is measured by a 32 cm phantom. Our study aimed to evaluate the effectiveness of size-specific dose estimate (SSDE) to compensate for the underestimated pediatric absorbed dose. Material and Methods: CTDIvol and dose-length product (DLP) of 320 pediatric chest CT (<1, 1-5, 5-10, 10-15 years) were obtained from Picture-Archiving and Communication System (PACS) in a hospital affiliated with the Shiraz University of Medical Sciences. CTDIvol was converted to SSDE based on the patient's effective diameter. The Statistical Package for Social Science (SPSS) was used for data analysis. Results: The variations between standard phantom (32cm) and the patients' mean effective diameter were approximately 65%, 57%, 47%, and 38%, across <1, 1-5, 5-10, 10-15 year age groups, respectively. The mean of SSDE for each age group was significantly higher than the corresponding CTDIvol values. Also, mean CTDIvol and SSDE values differed between age groups significantly (p<0.001). Results showed a strong correlation between age and the two-dose indicators, CTDIvol (0.361) and SSDE (0.184), with p<0.05. Conclusion: Pediatrics receive radiation doses comparable to the dose for adult-sized patients in chest CT protocol if the dosimetry procedure is not individualized. Thus, applying a size-based conversion coefficient is paramount in estimating the absorbed dose in pediatric chest CT.https://ijmp.mums.ac.ir/article_18925_37cbec0a349301549a50025be20dd56d.pdfxray computed tomography chest sizespecific dose estimate (ssde) paediatric |
| spellingShingle | Fariba Zarei Mahdokht Nasiri Zahra Etemadi Rezvan Ravanfar Haghighi Sabysachi chatterjee Pouria Abdollahi Khaneghah Vani Vardhan Chatterjee Evaluation of Size-Specific Dose Estimates for Optimizing Pediatric Chest CT Protocol Iranian Journal of Medical Physics x ray computed tomography chest size specific dose estimate (ssde) paediatric |
| title | Evaluation of Size-Specific Dose Estimates for Optimizing Pediatric Chest CT Protocol |
| title_full | Evaluation of Size-Specific Dose Estimates for Optimizing Pediatric Chest CT Protocol |
| title_fullStr | Evaluation of Size-Specific Dose Estimates for Optimizing Pediatric Chest CT Protocol |
| title_full_unstemmed | Evaluation of Size-Specific Dose Estimates for Optimizing Pediatric Chest CT Protocol |
| title_short | Evaluation of Size-Specific Dose Estimates for Optimizing Pediatric Chest CT Protocol |
| title_sort | evaluation of size specific dose estimates for optimizing pediatric chest ct protocol |
| topic | x ray computed tomography chest size specific dose estimate (ssde) paediatric |
| url | https://ijmp.mums.ac.ir/article_18925_37cbec0a349301549a50025be20dd56d.pdf |
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