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A Novel Approach to Multipinhole SPECT for Myocardial Perfusion Imaging

Tobias Funk, PhD1, Dennis L. Kirch, MSEE2, John E. Koss, MS2, Elias Botvinick, MD1 and Bruce H. Hasegawa, PhD1

1 Department of Radiology, University of California, San Francisco, San Francisco, California; and 2 Western Cardiology Research, Inc., Westminster, Colorado


Figure 1
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  		FIGURE 1.  (A) Experimental setup for multipinhole imaging of anthropomorphic torso phantom. Camera position is at left anterior 40°. (B) Simultaneously acquired projection data of torso phantom with cardiac insert and with liver uptake with 9-pinhole collimator.

 

Figure 2
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  		FIGURE 2.  Spatial resolution (A) and detection efficiency (B) for LEGP parallel-hole (•) and 9-pinhole collimator ({diamondsuit}). {diamond} depicts efficiency of 9-pinhole collimator at same spatial resolution as parallel-hole collimator. a.u. = arbitrary units.

 

Figure 3
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  		FIGURE 3.  Reconstruction of projection data measured with parallel-hole collimator (A) and 9-pinhole collimator (B).

 

Figure 4
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  		FIGURE 4.  (A) Activity distribution in NCAT phantom. (B) Tomogram reconstructed from 1 view of 9-pinhole collimator. (C) Tomogram reconstructed from 2 views. (D) Tomogram reconstructed from 4 views.

 

Figure 5
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  		FIGURE 5.  Circumferential profile curves for slice 36 of digital phantom and reconstructed images with 1, 2, and 4 views.

 




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