@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
	    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},