Patient-specific organ and effective dose estimates in pediatric oncology computed tomography

Physica Medica : PM : an International Journal Devoted to the Applications of Physics to Medicine and Biology : Official Journal of the Italian Association of Biomedical Physics (AIFB)
Yiming GaoLawrence T Dauer

Abstract

Estimate organ and effective doses from computed tomography scans of pediatric oncologic patients using patient-specific information. With IRB approval patient-specific scan parameters and patient size obtained from DICOM images and vendor-provided dose monitoring application were obtained for a cross-sectional study of 1250 pediatric patients from 0 through 20 y-olds who underwent head, chest, abdomen-pelvis, or chest-abdomen-pelvis CT scans. Patients were categorized by age. Organ doses and effective doses were estimated using VirtualDose™ CT based on patient-specific information, tube current modulation (TCM), and age-specific realistic phantoms. CTDIvol, DLP, and dose results were compared with those reported in the literature. CTDIvol and DLP varied widely as patient size varied. The 75th percentiles of CTDIvol and DLP were no greater than in the literature with the exception of head scans of 16-20 y-olds and of abdomen-pelvis scans of larger patients. Eye lens dose from a head scan was up to 69 mGy. Mean organ doses agreed with other studies at maximal difference of 38% for chest and 41% for abdomen-pelvis scans. Mean effective dose was generally higher for older patients. The highest effective doses were estimated for th...Continue Reading

Citations

Aug 16, 2019·AJR. American Journal of Roentgenology·Yiming GaoLawrence T Dauer
Sep 29, 2020·Radiation Protection Dosimetry·W J GarzónV F Cassola
Sep 16, 2020·Investigative Radiology·John Damilakis
Mar 30, 2021·Physica Medica : PM : an International Journal Devoted to the Applications of Physics to Medicine and Biology : Official Journal of the Italian Association of Biomedical Physics (AIFB)·Benard Ohene BotwePål Erik Goa
Apr 21, 2021·Radiation Protection Dosimetry·W Jaramillo-GarzónD F Alvarez-Aldana

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