The effect of source position accuracy on image quality in helical MDCT 3D image reconstruction

Amar Dhanantwari; Qiu Wang; Nirmal Soni

doi:10.1117/12.911288

3 March 2012 The effect of source position accuracy on image quality in helical MDCT 3D image reconstruction

Amar Dhanantwari, Qiu Wang, Nirmal Soni

Proceedings Volume 8313, Medical Imaging 2012: Physics of Medical Imaging; 83132D (2012) https://doi.org/10.1117/12.911288
Event: SPIE Medical Imaging, 2012, San Diego, California, United States

Abstract

Image reconstruction in helical CT assumes that the source position at which each view is acquired is accurately reported to the image reconstruction algorithm. However, in practical situations this is not always the case. Hardware, instrumentation and bandwidth limitations along with manufacturing tolerances limit the accuracy at which source positions may be recorded. This study simulates scans under the conditions of positional reporting errors in combination with errors in the time moments at which positions are reported. The resulting image quality is evaluated and the deviations from images obtained under ideal conditions are characterized using pixel to pixel differences and mutual information between image pairs.

Citation Download Citation

Amar Dhanantwari, Qiu Wang, and Nirmal Soni "The effect of source position accuracy on image quality in helical MDCT 3D image reconstruction", Proc. SPIE 8313, Medical Imaging 2012: Physics of Medical Imaging, 83132D (3 March 2012); https://doi.org/10.1117/12.911288

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