Abstract
scattered radiation is an important source of artifacts in x-ray CT imaging and its detrimental effects have become much stronger in 64-slice CT scanners with extended detector aperture. The magnitude and spatial distribution of the scatter component should be corrected for before or during the reconstruction process. Thorough knowledge of scatter distribution is essential for development of scatter correction algorithms. In this study a novel approach based on using dedicated blockers is proposed to efficiently calculate scatter profiles and scatter to primary ratio (SPR) in different detector rows in a CT scanner with 64-slice capability. The influence of different parameters such as tube voltage, phantom size and phantom off-centering on the scatter profile and SPR was quantitatively measured based on the developed method. The SPR decreases from 219.9 to 39.9 when the tube voltage increases from 80 kVp to 140 kVp in 21.5 cm water phantom. The proposed method is easy to use and straightforward and can be used for any measurement.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Tofts P S and Gore J C 1980 Some sources of artefact in computed tomography Phys. Med. Biol. 25 117–127
Johns P C and Yaffe M 1982 Scattered radiation in fan beam imaging systems Med. Phys. 9 231–9
Joseph P M and Spital R D 1982 The effects of scatter in x-ray computed tomography Med. Phys. 9 464–472
Glover G H 1982 Compton scatter effects in CT reconstructions Med. Phys. 9 860–7
Siewerdsen J H and Jaffray D A 2001 Cone-beam computed tomography with flat-panel imager: magnitude and effects of x-ray scatter Med. Phys. 28 220–231
Ay M R and Zaidi H. 2005 Development and validation of MCNP4Cbased Monte Carlo simulator for fan-and cone-beam x-ray CT. Phys. Med. Biol. 50:4863–4885.
Colijn A P and Beekman F J 2004 Accelerated simulation of cone beam x-ray scatter projections IEEE Trans. Med.Imaging 23 584–590
Malusek A, Sandborg M P and Carlsson G A 2003 Simulation of scatter in cone beam CT: effects on projection image quality SPIE Medical Imaging 2003: Physics of Medical Imaging (San Diego, CA, USA) SPIE vol 5030; pp 740–751
Endo M., Mori S., Tsunoo T., Miyazaki H. 2006 Magnitude and effects of x-ray scatter in a 256-slice CT scanner Med. Phys. 33 3359–3368
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2008 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Akbarzadeh, A., Ay, M.R., Ghadiri, H., Sarkar, S., Zaidi, H. (2008). A Novel Approach for Experimental Measurement of Scatter Profile and Scatter to Primary Ratio in 64-Slice CT Scanner. In: Abu Osman, N.A., Ibrahim, F., Wan Abas, W.A.B., Abdul Rahman, H.S., Ting, HN. (eds) 4th Kuala Lumpur International Conference on Biomedical Engineering 2008. IFMBE Proceedings, vol 21. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-69139-6_120
Download citation
DOI: https://doi.org/10.1007/978-3-540-69139-6_120
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-69138-9
Online ISBN: 978-3-540-69139-6
eBook Packages: EngineeringEngineering (R0)