Alignment and Resolution Studies of a MARS CT Scanner¹

A. Gongadze^a, A. Zhemchugov^a, G. Chelkov^a, D. Kozhevnikov^a, I. Potrap^a, M. Demichev^a,
P. Smolyanskiy^a, R. Abramishvili^a, S. Kotov^a, A. P. Butler^b,
P. H. Butler^c, and S. T. Bell^d

^aJoint Institute for Nuclear Research, Dubna, Moscow oblast, 141980 Russia

^bUniversity of Otago, Christchurch, New Zealand

^cUniversity of Canterbury, Christchurch, New Zealand

^dMARS Bioengineering Ltd., Christchurch, New Zealand

e-mail: chelkov@jinr.ru, anthony@butler.co.nz,
phil.butler@canterbury.ac.nz, Stephen.Bell@marsbioimaging.com

Abstract—This paper describes a procedure of alignment of MARS CT scanner with cone beam geometry. The
position of the xray source relative to the detector, the tilt of the detector are measured during alignment. The
mechanical precision of gantry movement is determined. Significant improvement in the quality of image
reconstruction has been achieved as a result of the calibration. Spatial resolution (PTF) of the scanner is con-
firmed to be about 30 m.

DOI: 10.1134/S1547477115050064

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