PMID: 15248574Jul 14, 2004Paper

Redundant data and exact helical cone-beam reconstruction

Physics in Medicine and Biology
Dominic HeuscherF Noo

Abstract

This paper is about helical cone-beam reconstruction and the use of redundant data in the framework of two reconstruction methods. The first method is the approximate wedge reconstruction formula introduced by Tuy at the 3D meeting in 1999. The second method is a (exact) hybrid implementation of the exact filtered backprojection formula of Katsevich (2004 Adv. Appl. Math. at press) that combines filtering in the native cone-beam geometry with backprojection in the wedge geometry. The similarity of the two methods is explored and their image quality performance is compared for geometries with up to 112 detector rows. Furthermore, the concept of aperture weighting is introduced to allow the handling of variable amounts of redundant data. A reduction of motion artefacts using redundant data is demonstrated for geometries with 16, 32 and 112 detector rows using a pitch factor of 1.25. For scans with up to 100 rows, utilizing 50% of the redundant data provided excellent results without any introduction of cone-beam artefacts. For larger cone angles, an alternative approach that utilizes all available redundant data, even at reduced pitch factors, is suggested.

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Citations

Jul 11, 2009·Physics in Medicine and Biology·Harald SchöndubeFrédéric Noo
Feb 7, 2007·Medical Physics·Alexander L C KwanShih-Ying Huang
Sep 21, 2004·Medical Physics·G ShechterR Proksa
Jul 1, 2011·Medical Physics·Thomas KöhlerRoland Proksa
Nov 4, 2005·Medical Physics·Alexander L C KwanNikula Shah
Jul 10, 2010·Tsinghua Science and Technology·Junguo BianXiaochuan Pan
Jul 11, 2006·IEEE Transactions on Medical Imaging·Thomas KöhlerPeter Koken
Dec 15, 2015·IEEE Transactions on Bio-medical Engineering·Shaojie Tang, Xiangyang Tang
Aug 3, 2004·Physics in Medicine and Biology·Hiroyuki KudoMichel Defrise
Jul 20, 2007·Physics in Medicine and Biology·P ForthmannM Defrise
Oct 18, 2018·European Radiology Experimental·Salim Si-MohamedPhilippe Douek
Jan 16, 2021·Diagnostic and Interventional Imaging·Sara BoccaliniPhilippe Douek

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