PMID: 11339743May 8, 2001Paper

Effect of scattered radiation on image noise in cone beam CT

Medical Physics
M EndoK Yoshida

Abstract

Cone beam CT has a capability for the 3-dimensional imaging of large volumes with isotropic resolution, and has a potentiality for 4-dimensional imaging (dynamic volume imaging), because cone beam CT acquires data of a large volume with one rotation of an x-ray tube-detector pair. However, one of the potential drawbacks of cone beam CT is a larger amount of scattered x-rays, which may enhance the noise in reconstructed images, and thus affect the low-contrast detectablity. Our aim in this work was to estimate the scatter fractions and effects of scatter on image noise, and to seek methods of improving image quality in cone beam CT. First we derived a relationship between the noise in a reconstructed image and in an x-ray intensity measurement. Then we estimated the scatter to primary ratios in x-ray measurements using a Monte-Carlo simulation. From these we estimated the image noise under relevant clinical conditions. The results showed that the scattered radiation made a substantial contribution to the image noise. However, focused collimators could improve it by decreasing the scattered radiation drastically while keeping the primary radiation at nearly the same level. A conventional grid also improved the image noise, though...Continue Reading

References

Jan 1, 1977·Journal of Computer Assisted Tomography·D A CheslerN J Pelc
Mar 1, 1985·Physics in Medicine and Biology·H KanamoriE Takenaka
Apr 1, 1996·Academic Radiology·R Ning, R A Kruger
May 8, 1998·Medical Physics·K Taguchi, H Aradate
Mar 1, 1994·Physics in Medicine and Biology·D Saint-FélixA Rougée

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Apr 20, 2006·European Journal of Nuclear Medicine and Molecular Imaging·Mohammad Reza Ay, Habib Zaidi
Jun 26, 2007·European Radiology·Willi A Kalender, Yiannis Kyriakou
Jul 6, 2007·Medical & Biological Engineering & Computing·Habib Zaidi, Mohammad Reza Ay
Dec 12, 2012·International Journal of Computer Assisted Radiology and Surgery·Yifei LiuLiji Cao
Jun 7, 2013·Physics in Medicine and Biology·Johan NuytsFreek J Beekman
Jun 14, 2012·International Journal of Dentistry·Hakan BilhanOnur Geckili
Nov 16, 2010·Journal of Periodontology·Daisuke UenoKaoru Kobayashi
Jul 16, 2009·Nihon Hoshasen Gijutsu Gakkai zasshi·Nozomu NagasueMasataka Uetani
Nov 23, 2011·Nihon Hoshasen Gijutsu Gakkai zasshi·Tsutomu Gomi
Oct 7, 2006·Medical Physics·Masahiro EndoHiroaki Miyazaki
Nov 26, 2010·Medical Physics·Dimitrios Lazos, Jeffrey F Williamson
Feb 26, 2008·Medical Physics·Klaus J EngelGünter Zeitler
May 9, 2012·Medical Physics·Ioannis Sechopoulos
Jan 26, 2012·Medical Physics·Steven BartolacDavid Jaffray
Nov 4, 2005·Medical Physics·Alexander L C KwanNikula Shah
Dec 19, 2013·Computational and Mathematical Methods in Medicine·Xue DongLei Zhu
Dec 13, 2012·Medical Physics·William GilesFang-Fang Yin
Mar 1, 2012·Dento Maxillo Facial Radiology·B BecharaM Noujeim
Aug 5, 2014·Australasian Physical & Engineering Sciences in Medicine·Kavitha SrinivasanJustin Shepherd
Apr 14, 2016·Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology·Sergio Lins de-Azevedo-VazFrancisco Haiter-Neto
Jan 23, 2016·Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology·Ruben PauwelsSoontra Panmekiate
Nov 15, 2011·Journal of Oral and Maxillofacial Surgery : Official Journal of the American Association of Oral and Maxillofacial Surgeons·Gerlig WidmannReto Bale
May 17, 2011·Physica Medica : PM : an International Journal Devoted to the Applications of Physics to Medicine and Biology : Official Journal of the Italian Association of Biomedical Physics (AIFB)·M BlessingP Zygmanski
Apr 23, 2010·American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics·Aaron Dean Molen
May 12, 2009·Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics·Gerlig WidmannReto Bale
Feb 6, 2008·American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics·Jeffrey C KwongMark G Hans
Sep 29, 2007·Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics·M LoubeleP Suetens
Jul 10, 2007·Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics·Ryoko TsuchidaTomohiro Okano
Jun 6, 2009·Clinical Oral Implants Research·Yan HuaReinhilde Jacobs
Apr 3, 2012·Clinical Oral Implants Research·G DvorakA Gahleitner

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