Pulse pileup statistics for energy sensitive photon counting detectors with pulse height analysis

Katsuyuki Taguchi; Somesh Srivastava; Qiulin Tang; Brian S. Caffo; Jan S. Iwanczyk; Neal E. Hartsough; William C. Barber; Jochen Cammin

doi:10.1117/12.911365

2 March 2012 Pulse pileup statistics for energy sensitive photon counting detectors with pulse height analysis

Katsuyuki Taguchi, Somesh Srivastava, Qiulin Tang, Brian S. Caffo, Jan S. Iwanczyk, Neal E. Hartsough, William C. Barber, Jochen Cammin

Author Affiliations +

Proceedings Volume 8313, Medical Imaging 2012: Physics of Medical Imaging; 83130Z (2012) https://doi.org/10.1117/12.911365
Event: SPIE Medical Imaging, 2012, San Diego, California, United States

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.

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Katsuyuki Taguchi, Somesh Srivastava, Qiulin Tang, Brian S. Caffo, Jan S. Iwanczyk, Neal E. Hartsough, William C. Barber, and Jochen Cammin "Pulse pileup statistics for energy sensitive photon counting detectors with pulse height analysis", Proc. SPIE 8313, Medical Imaging 2012: Physics of Medical Imaging, 83130Z (2 March 2012); https://doi.org/10.1117/12.911365

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