In limited angular aperture tomosynthesis systems, the addition of new degrees of freedom for data acquisition, such as angular aperture and sampling, requires specific optimizations. Typical optimization criteria include MTF, SNR, and NEQ. However, the strong anisotropy of the sampling frequency on the zaxis is usually neglected. Considering the signal in slices as the information contained within the volume defined by the slice plane and the z-sampling interval, the MTF of the reconstruction is obtained by integrating reconstruction blur within the slice. The relationship between z-sampling and aperture is proposed in terms of preservation of the DQE.

Date Published: 13 March 2009
PDF: 7 pages
Proc. SPIE 7258, Medical Imaging 2009: Physics of Medical Imaging, 72581P (13 March 2009); doi: 10.1117/12.813659

Published in SPIE Proceedings Vol. 7258:
Medical Imaging 2009: Physics of Medical Imaging
Ehsan Samei; Jiang Hsieh, Editor(s)