Claas Bontus et al 2007 Phys. Med. Biol. 52 107 doi:10.1088/0031-9155/52/1/008
Claas Bontus, Peter Koken, Thomas Köhler and Roland Proksa
Show affiliationsThe combination of circular CT with a helical trajectory segment results in a mathematically complete data set. We present a reconstruction algorithm which is mathematically exact and of the filtered back-projection type. The algorithm ensures that only Radon planes which are not covered along the circle are taken into account, when data from the helical segment are back-projected. Therefore, the helical segment contributes only to low-frequency parts of trans-axial slices. Data along the helix can be obtained with a very low acquisition dose.
44A12 Radon transform (See also 92C55)
92C55 Biomedical imaging and signal processing (See also 44A12, 65R10)
Issue 1 (7 January 2007)
Received 10 August 2006, in final form 25 October 2006
Published 12 December 2006
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