Study for pediatric protocol optimization in chest CT scans
DOI:
https://doi.org/10.15392/bjrs.v7i1A.334Keywords:
dosimetry, phantoms, tomographyAbstract
Radiological exams are increasingly used in clinic for diagnostic analysis of different types of pathologies. These tests are associated with a dose that is received by the patient. In addition, the risks in exposure to ionizing radiation are different according to the group which the individual belongs. According to age, the group of children is more radiosensitive than adults. In this work we have obtained values of the air-weighted kerma index for chest scans studies in a Genereal Electric Computed Tomography (CT) scanner model Discovery with 64-channels. Using an adult protocol, two scans have been performed, one using a cylinder standard PMMA phantom while the second one has used an oblong chest phantom designed for a two year old pediatric patient. Furthermore, other protocols have been selected by varying the X-ray tube current but maintaining the same voltage, in order to obtain a reduction in the dose received by the pediatric patient but maintaining the image quality. The use of the adult protocol in the child phantom has generated a value in the air-weighted kerma index 89.47% greater than that received using the adult phantom. As small patients receive higher doses, the use of specific protocols for children is important for the dose reduction in CT tests. Due to the different characteristics of CT scanners and in order to optimize these protocols with regard to dose and diagnostic image quality, there is a need to have pediatric phantoms in health centersDownloads
References
AAPM-The American Association of Physicists in Medicine. Size-Specific Dose Estimates (SSDE) in Pediatric and Adult Body CT Examinations, AAPM report 204, 2011.
VASSILEVA, Jenia, et al. IAEA survey of pediatric CT practice in 40 countries in Asia, Eu-rope, Latin America, and Africa: Part 1, frequency and appropriateness. American Journal of Roentgenology, vol. 198, no 5, p. 1021-1031. , 2012.
ABURJAILE, W. N.; MOURAO, A. P. Development of a chest phantom for testing in Computed Tomog-raphy scans. Radiation Physics and Chemistry, Vol 140, p 275-277, 2017.
TASK GROUP ON CONTROL OF RADIATION DOSE IN COMPUTED TOMOGRAPHY, et al. Managing patient dose in computed tomography. A report of the International Commission on Radiological Protection. Annals of the ICRP, vol. 30, no 4, p. 7. , 2000.
MCCOLLOUGH, Cynthia, et al. The measurement, reporting, and management of radiation dose in CT. Report of AAPM Task Group, vol. 23, no 23, p. 1-28. 2008.
ANDISCO, D., et al. Optimización Interdisciplinaria de Protocolos en Tomografía Computada a partir de la modificación del mA y del control del ruido en la imagen. Revista Argentina de Radiología, vol. 74, no 4, p. 397-402. , 2010.
ANDISCO, D.; BLANCO, S.; BUZZI, A. E. Dosimetría en tomografía computada. Revista Argentina de Radiologia, vol. 78, no 3, p. 156-160. 2014.
LADINO, M. Estudo de dosimetría e qualidade de imagem em varreduras de tomografía com-putadorizada de cabeça utilizando objeto simulador, Trabajo de Posgraduación, Universidad Federal de Minas Gerais, L155e, Anexo f: 75, Bibliografía f: 72-74, CDU: 621.039(043).
SINGH, Sarabjeet, et al. Automatic exposure control in CT: applications and limitations. Journal of the American College of Radiology, vol. 8, no 6, p. 446-449, 2011.
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