Body contour 180 degrees pinhole SPET with or without tilted detector: a phantom study
Seret, Alain ; ; et al
in European Journal of Nuclear Medicine and Molecular Imaging (2003), 30(9), 1205-1210
This study investigated the feasibility of ordered subsets expectation maximisation (OS-EM) reconstruction of 180 degrees pinhole single-photon emission tomography (SPET) acquired in body contour mode ... [more ▼]
This study investigated the feasibility of ordered subsets expectation maximisation (OS-EM) reconstruction of 180 degrees pinhole single-photon emission tomography (SPET) acquired in body contour mode (variable distance between the detector and the axis of rotation for each projection) with or without a tilted detector head. Four non-circular orbits were designed bearing in mind the rotation radius and tilt angle values of previous pinhole SPET acquisitions in patients with circular orbits. The reconstructions were performed using a dedicated OS-EM algorithm. Reconstructed images of line and uniformity phantoms showed that the spatial and uniformity characteristics of the radioactive objects were preserved. In comparison with the circular orbits, the non-circular orbits allowed only a moderate gain (maximum 10%) in resolution. However, body contour pinhole SPET would significantly facilitate the camera set-up and in this way should decrease the camera set-up time, which is an important parameter in patient studies. [less ▲]Detailed reference viewed: 37 (2 ULg)
Reconstruction OSEM de tomoscintigraphies acquises avec un collimateur sténopé et une trajectoire non-circulaire.
Seret, Alain ; ;
in Médecine Nucléaire : Imagerie Fonctionnelle et Métabolique (2003), 27Detailed reference viewed: 18 (2 ULg)