PMID: 15248582Jul 14, 2004Paper

A new weighting scheme for cone-beam helical CT to reduce the image noise

Physics in Medicine and Biology
Katsuyuki TaguchiMichael D Silver

Abstract

Reducing the patient dose while keeping the image noise at the same level is desired for x-ray CT examinations. In order to achieve the goal, we propose a new weighting scheme taking the validity of the data and redundant data samples into account. The method is evaluated with a new generalized version of the Feldkamp helical reconstruction algorithm. It allows us to enlarge the projection angular range used in reconstruction, and thus, to reduce the image noise by increasing the detector utilization rate to 100% without sacrificing the image quality or z-resolution. This concept can be adapted to other exact or approximate algorithms as far as they use redundant data samples.

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Citations

Dec 23, 2008·AJR. American Journal of Roentgenology·Yoshinori FunamaYasuyuki Yamashita
Dec 24, 2005·Medical Physics·Ming Yan, Cishen Zhang
Feb 7, 2007·Medical Physics·Alexander L C KwanShih-Ying Huang
Mar 15, 2006·Medical Physics·Katsuyuki TaguchiIlmar A Hein
Nov 11, 2005·Medical Physics·Alexander A ZamyatinMichael D Silver
Jul 1, 2011·Medical Physics·Thomas KöhlerRoland Proksa
Nov 4, 2005·Medical Physics·Alexander L C KwanNikula Shah
Apr 7, 2012·International Journal of Biomedical Imaging·A V Narasimhadhan, Kasi Rajgopal
Sep 22, 2009·Computer Methods and Programs in Biomedicine·Sven SteckmannMarc Kachelriess
Jul 16, 2008·Academic Radiology·Tatsuro SuzukiKazuhiro Katada
Dec 15, 2015·IEEE Transactions on Bio-medical Engineering·Shaojie Tang, Xiangyang Tang
May 30, 2009·Physics in Medicine and Biology·Sven SteckmannMarc Kachelriess

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