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Proceedings Paper

Pulse pileup statistics for energy sensitive photon counting detectors with pulse height analysis
Author(s): Katsuyuki Taguchi; Somesh Srivastava; Qiulin Tang; Brian S. Caffo; Jan S. Iwanczyk; Neal E. Hartsough; William C. Barber; Jochen Cammin
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Paper Abstract

Photon counting statistics with pulse pileup effects (PPE) have been investigated for detection schemes with two assumptions: a fixed deadtime (i.e., non-paralyable and paralyzable detection schemes) and a delta pulse shape. Analytical expressions have been developed which shed light on interesting findings: (1) the variance becomes smaller than mean with PPE; and (2) the variance-to-mean ratio (VMR) of narrow energy windows remains very close to 1. In this study, we experimentally investigate VMR with PPE with a variable deadtime (i.e., pulse height analysis) and bipolar and unipolar pulse shapes with a long tail in addition to the above cases. We will use Monte Carlo simulation for a systematic study and a physical photon counting detector to confirm the results.

Paper Details

Date Published: 2 March 2012
PDF: 7 pages
Proc. SPIE 8313, Medical Imaging 2012: Physics of Medical Imaging, 83130Z (2 March 2012); doi: 10.1117/12.911365
Show Author Affiliations
Katsuyuki Taguchi, The Johns Hopkins Univ. (United States)
Somesh Srivastava, The Johns Hopkins Univ. (United States)
Qiulin Tang, The Johns Hopkins Univ. (United States)
Brian S. Caffo, The Johns Hopkins Univ. (United States)
Jan S. Iwanczyk, DxRay, Inc. (United States)
Neal E. Hartsough, DxRay, Inc. (United States)
William C. Barber, DxRay, Inc. (United States)
Jochen Cammin, The Johns Hopkins Univ. (United States)

Published in SPIE Proceedings Vol. 8313:
Medical Imaging 2012: Physics of Medical Imaging
Norbert J. Pelc; Robert M. Nishikawa; Bruce R. Whiting, Editor(s)

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