@article{(Open Science Index):https://publications.waset.org/pdf/7968, title = {Kerma Profile Measurements in CT Chest Scans– a Comparison of Methodologies}, author = {Bruno B. Oliveira and Arnaldo P. Mourão and Teógenes A. da Silva}, country = {}, institution = {}, abstract = {The Brazilian legislation has only established diagnostic reference levels (DRLs) in terms of Multiple Scan Average Dose (MSAD) as a quality control parameter for computed tomography (CT) scanners. Compliance with DRLs can be verified by measuring the Computed Tomography Kerma Index (Ca,100) with a pencil ionization chamber or by obtaining the kerma distribution in CT scans with radiochromic films or rod shape lithium fluoride termoluminescent dosimeters (TLD-100). TL dosimeters were used to record kerma profiles and to determine MSAD values of a Bright Speed model GE CT scanner. Measurements were done with radiochromic films and TL dosimeters distributed in cylinders positioned in the center and in four peripheral bores of a standard polymethylmethacrylate (PMMA) body CT dosimetry phantom. Irradiations were done using a protocol for adult chest. The maximum values were found at the midpoint of the longitudinal axis. The MSAD values obtained with three dosimetric techniques were compared.}, journal = {International Journal of Biomedical and Biological Engineering}, volume = {5}, number = {8}, year = {2011}, pages = {293 - 296}, ee = {https://publications.waset.org/pdf/7968}, url = {https://publications.waset.org/vol/56}, bibsource = {https://publications.waset.org/}, issn = {eISSN: 1307-6892}, publisher = {World Academy of Science, Engineering and Technology}, index = {Open Science Index 56, 2011}, }