Share Email Print
cover

Proceedings Paper

Dynamic platform for moving organ imaging
Author(s): Romain Grosjean; Rui Guerra; Céline Lorentz; Cédric Pasquier; Pierre-André Vuissoz; Michel Claudon; Jacques Felblinger
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

A multimodality platform (CT, PET, Radiotherapy) has been developed in order to move phantoms (maximum weight: 70kg). This allows the study of the influence of motion on image quality. The translation system (160 mm in the z axis, maximal speed of 50 mm × s-1) was controlled by a computer via a NI Motion Controller PCI 7344 (National Instrument, TX, USA). As an initial experiment, an anthropomorphic cardiac CT phantom (QRM, Moehrendorf, Germany) was moved linearly with speeds of 5, 10 and 20 mm × s-1. Acquisitions were done on a Siemens Somatom Volume Zoom CT Scanner. To compare dynamic and static images, mutual information, correlation coefficient, standard deviation, volume computation and radiologist scoring were conducted. The mean position error of the platform was 0.1mm ± 0.04. Automatic evaluation of the image quality and/or the blurring is not easy. As predicted, we found an increase in artifacts with the speed of the phantom. The platform allows us to simulate physiological motions (respiratory and cardiac) in order to study their real influence on image quality and to correct them. We can already produce z axis physiological motion with the platform. More degrees of freedom (y and z rotations, x and y translations) will be added to improve the simulation of physiological motions.

Paper Details

Date Published: 6 March 2006
PDF: 11 pages
Proc. SPIE 6142, Medical Imaging 2006: Physics of Medical Imaging, 61423C (6 March 2006); doi: 10.1117/12.651702
Show Author Affiliations
Romain Grosjean, IADI, Univ. Henri Poincaré, INSERM, CHU Nancy (France)
Rui Guerra, IADI, Univ. Henri Poincaré, INSERM, CHU Nancy (France)
Siemens Medical Solutions (France)
Céline Lorentz, IADI, Univ. Henri Poincaré, INSERM, CHU Nancy (France)
Cédric Pasquier, IADI, Univ. Henri Poincaré, INSERM, CHU Nancy (France)
Schiller Médical (France)
Pierre-André Vuissoz, IADI, Univ. Henri Poincaré, INSERM, CHU Nancy (France)
Michel Claudon, IADI, Univ. Henri Poincaré, INSERM, CHU Nancy (France)
Jacques Felblinger, IADI, Univ. Henri Poincaré, INSERM, CHU Nancy (France)


Published in SPIE Proceedings Vol. 6142:
Medical Imaging 2006: Physics of Medical Imaging
Michael J. Flynn; Jiang Hsieh, Editor(s)

© SPIE. Terms of Use
Back to Top