Monte Carlo simulation of transmission studies using planar source with parallel collimators and line source with fan-beam collimators

A knowledge of the distribution of the attenuation coefficient is generally required for a successful correction of attenuation in nonhomogeneous regions. This can be accomplished by transmission measurement with either parallel or fan-bean collimation. Monte Carlo simulation makes it possible to fully evaluate the results from such a correction. This study shows results from such simulations for both parallel and fan-beam transmission imaging. Also, examples of the effect of down-scatter from an emission /sup 99m/Tc radionuclide into the energy window for a transmission /sup 153/Gd radionuclide are shown.<<ETX>>

[1]  Michael A. King,et al.  Investigation of the stationarity of the modulation transfer function and the scatter fraction in conjugate view SPECT restoration filtering , 1989 .

[2]  M Ljungberg,et al.  Attenuation and scatter correction in SPECT for sources in a nonhomogeneous object: a monte Carlo study. , 1991, Journal of nuclear medicine : official publication, Society of Nuclear Medicine.

[3]  D. Bailey,et al.  Improved SPECT using simultaneous emission and transmission tomography. , 1987, Journal of nuclear medicine : official publication, Society of Nuclear Medicine.

[4]  M Ljungberg,et al.  Attenuation correction in SPECT based on transmission studies and Monte Carlo simulations of build-up functions. , 1990, Journal of nuclear medicine : official publication, Society of Nuclear Medicine.

[5]  Ronald J. Jaszczak,et al.  Transmission Computed Tomography Data Acquisition with a SPECT System , 1987 .

[6]  F D Thomas,et al.  Cone-beam transmission computed tomography for nonuniform attenuation compensation of SPECT images. , 1991, Journal of nuclear medicine : official publication, Society of Nuclear Medicine.

[7]  E C Frey,et al.  Simultaneous acquisition of emission and transmission data for improved thallium-201 cardiac SPECT imaging using a technetium-99m transmission source. , 1992, Journal of nuclear medicine : official publication, Society of Nuclear Medicine.

[8]  R. V. Van Heertum,et al.  A count-based algorithm for attenuation-corrected volume determination using data from an external flood source. , 1985, Journal of nuclear medicine : official publication, Society of Nuclear Medicine.