Abstract
Patient motion during brain SPECT studies can degrade resolution and introduce distortion. We have developed a correction method which incorporates a motion tracking system to monitor the position and orientation of the patient's head during acquisition. Correction is achieved by spatially repositioning projections according to measured head movements and reconstructing these projections with a fully three-dimensional (3D) algorithm. The method has been evaluated in SPECT studies of the Hoffman 3D brain phantom performed on a triple head camera with fan beam collimation. Movements were applied to the phantom and recorded by a head tracker during SPECT acquisition. Fully 3D reconstruction was performed using the motion data provided by the tracker. Correction accuracy was assessed by comparing the corrected and uncorrected studies with a motion free study, visually and by calculating mean squared error (MSE). In all studies, motion correction reduced distortion and improved MSE by a factor of 2 or more. We conclude that this method can compensate for head motion under clinical SPECT imaging conditions.
| Original language | English |
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| Title of host publication | IEEE Nuclear Science Symposium and Medical Imaging Conference |
| Pages | 1770-1775 |
| Number of pages | 6 |
| Volume | 3 |
| Publication status | Published - 1999 |
| Externally published | Yes |
| Event | Proceedings of the 1998 IEEE Nuclear Science Symposium Conference Record - Toronto, Que, Can Duration: 8 Nov 1998 → 14 Nov 1998 |
Other
| Other | Proceedings of the 1998 IEEE Nuclear Science Symposium Conference Record |
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| City | Toronto, Que, Can |
| Period | 8/11/98 → 14/11/98 |