Estimating Effective Diameter and Scan Length of Abdomen and Pelvis for Radiation Dose Optimization in Computed Tomography Imaging Suitable for the Indian Population – A Preliminary Study
| Autor: | Vandana Nathan, Roshan S. Livingstone, Ivan James Prithishkumar |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | National Journal of Clinical Anatomy, Vol 13, Iss 3, Pp 108-114 (2024) |
| Druh dokumentu: | article |
| ISSN: | 2277-4025 2321-2780 |
| DOI: | 10.4103/NJCA.NJCA_110_24 |
| Popis: | Background: Utilization of computed tomography (CT) has dramatically increased during the last decade with a concurrent increase in exposure to ionizing radiation. Even low levels of exposure have been linked to the development of cancer. Various dose reduction and optimization techniques have been attempted to minimize the risk. Dose optimization becomes crucial when scanning thin and small-built individuals, particularly children. Reference phantoms of European or North American descent are used to develop radiological protocols. CT dose index (CTDI) metrics like scan length, volume CTDI, and dose-length product help to measure the amount of radiation dose received by patients during CT scans. Methodolgy: We studied the anatomical dimensions of the CT abdomen and pelvis from the topographic and tomographic images using the standard bony landmarks in 340 children and 500 adults (F = 250, M = 250) and. Cross-sectional measurements and effective diameter were also used to generate CT phantom models. Results: Using measured variables, phantom models have been generated in different age groups in children and adults representative of the Indian population showing a significant increase in dimensions from pediatric to adult phantom. Dimensions vary from classic reference phantoms of European or North American descent. Conclusion: Diagnostic reference levels must be adjusted according to the age of the patient, size of organs, or surface area of examination as body proportions vary between age groups, sex, and race. Data from this study can be used to generate the age- and sex-specific preset protocols for dose optimization in the adult Indian and pediatric population to minimize exposure risk, particularly in young children. |
| Databáze: | Directory of Open Access Journals |
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