Title :
Dual energy CT tissue quantitation for Monte-Carlo based treatment planning for brachytherapy
Author :
Devic, Slobodan ; Monroe, James I. ; Mutic, Sasa ; Whiting, Bruce ; Williamson, Jeffrey F.
Author_Institution :
Radiat. Oncology Center, Washington Univ. Sch. of Med., St. Louis, MO, USA
Abstract :
A new experimental method using dual-energy CT tissue-quantization (DECTQ) is proposed to identify compositional and geometric characteristics of tissue heterogeneities in and around low-energy seed implant sites. The method is based on the assumption that the total attenuation coefficient of an arbitrary material can be expressed as a linear combination of mass attenuation coefficients of two basis materials. The authors have validated the method in the energy range from 10-1000 keV demonstrating that all cross-section data needed for Monte Carlo simulation in this energy range can be obtained with satisfactory accuracy
Keywords :
Monte Carlo methods; X-ray absorption; biological tissues; computerised tomography; radiation therapy; 10 to 1000 keV; Monte-Carlo based treatment planning; brachytherapy; compositional characteristics; dual energy CT tissue quantitation; geometric characteristics; low-energy seed implant sites; mass attenuation coefficients; therapeutic nuclear medicine; tissue heterogeneities; Attenuation measurement; Biological materials; Brachytherapy; Composite materials; Computed tomography; Energy measurement; Humans; Imaging phantoms; Implants; Monte Carlo methods;
Conference_Titel :
Engineering in Medicine and Biology Society, 2000. Proceedings of the 22nd Annual International Conference of the IEEE
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-6465-1
DOI :
10.1109/IEMBS.2000.900750
