title: A new graphical user interface for fast construction of computation phantoms and MCNP calculations: application to calibration of in vivo measurement systems
abstract: Reports on a new utility for development of computational phantoms for Monte Carlo calculations and data analysis for in vivo measurements of radionuclides deposited in tissues. The individual properties of each worker can be acquired for a rather precise geometric representation of his (her) anatomy, which is particularly important for low energy gamma ray emitting sources such as thorium, uranium, plutonium and other actinides. The software enables automatic creation of an MCNP input data file based on scanning data. The utility includes segmentation of images obtained with either computed tomography or magnetic resonance imaging by distinguishing tissues according to their signal (brightness) and specification of the source and detector. In addition, a coupling of individual voxels within the tissue is used to reduce the memory demand and to increase the calculational speed. The utility was tested for low energy emitters in plastic and biological tissues as well as for computed tomography and magnetic resonance imaging scanning information
keyphrases: graphical user interface computational phantoms computational phantoms calibration in vivo measurements in vivo measurement systems Monte Carlo calculations radionuclides tissues worker precise geometric representation anatomy low energy gamma ray emitting sources actinides software automatic creation MCNP input data file scanning data computed tomography signal brightness detector individual voxels memory demand calculational speed plastic biological tissues magnetic resonance imaging scanning information computation phantoms Th U Pu