title: Improved tomographic reconstruction in seven-pinhole imaging.
abstract: Cardiac emission tomography using a seven-pinhole collimator has received only little appreciation as a diagnostic imaging technique. The main reasons are the limited angular sampling of the seven-pinhole device and the difficulties encountered in properly positioning the patient relative to the collimator/camera system. In order to overcome these problems, we have developed a modified ART3 algorithm for reconstruction of the radioactivity distribution in the heart. The method is very appropriate for seven-pinhole tomography, as demonstrated by the quality of the reconstructions, by the excellent point source resolution of the system response, and by a comparison to two other suitable reconstruction techniques, viz., SMART and SIRT.
authors.forename: J W
authors.initials: JW
authors.lastname: Van Giessen
authors.forename: M A
authors.initials: MA
authors.lastname: Viergever
authors.forename: C N
authors.initials: CN
authors.lastname: De Graaf