Title :
Evaluation of data acquisition geometries and strategies for myocardial SPECT imaging
Author :
Qi, Y.J. ; Tsui, B.M.W. ; Gilland, K.J. ; Frey, E.C. ; Gullberg, G.T.
Author_Institution :
Dept. of Biomed. Eng., North Carolina Univ., Chapel Hill, NC, USA
fDate :
6/23/1905 12:00:00 AM
Abstract :
This study evaluates myocardial SPECT images obtained from parallel-hole (PH) and fan-beam (FB) collimator geometries using both circular-orbit (CO) and noncircular-orbit (NCO) acquisitions. A newly developed 4D NURBS-based cardiac-torso (NCAT) was used to simulate the 99mTc-sestamibi uptakes in human torso with myocardial defects in the left ventricular (LV) wall. Projection data including the effects of attenuation, collimator-detector response and scatter were generated using SIMSET Monte Carlo simulations. A large number of photon histories were generated such that the projection data were close to noise-free. Poisson noise fluctuations were then added to simulate the count densities found in clinical data
Keywords :
Monte Carlo methods; cardiology; data acquisition; fluctuations; random noise; single photon emission computed tomography; 4D NURBS-based cardiac-torso; 99mTc-sestamibi uptakes; Poisson noise fluctuations; SIMSET Monte Carlo simulations; Tc; circular-orbit acquisitions; collimator-detector response; data acquisition geometries; fan-beam collimator; human torso; left ventricular wall; myocardial SPECT imaging; noncircular-orbit acquisitions; parallel-hole collimator; single photon emission computed tomography; Attenuation; Collimators; Data acquisition; Electromagnetic scattering; Geometry; Humans; Myocardium; Particle scattering; Single photon emission computed tomography; Torso;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2001 IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-7324-3
DOI :
10.1109/NSSMIC.2001.1009251
