Medical Imaging Technology by Mark A. Haidekker

Author:Mark A. Haidekker
Language: eng
Format: epub
Publisher: Springer New York, New York, NY

(4.11)

where indicates the 3x3 neighborhood of pixel in the conventional two-dimensional fashion.

Arithmetic reconstruction has only recently gained a foothold in SPECT reconstruction due to its computational expense. The filtered backprojection, for example, provides a reconstruction several orders of magnitude faster than ART or MLEM and remained the main-stream reconstruction method for a long time in spite of the superior image quality of iterative methods. However, the development of ordered-subset reconstruction and the availability of faster hardware (including accelerated processing on graphics hardware) are increasing the attractiveness of iterative reconstruction methods.

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