Real-time list-mode processing of gated cardiac blood pool examinations with forward-backward framing |
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Authors: | James L. Lear Jonathan P. Pratt |
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Affiliation: | (1) Division of Nuclear Medicine (A034), Department of Radiology, University of Colorado Health Sciences Center, 4200 E. 9th Avenue, 80262 Denver, CO, USA |
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Abstract: | List-mode processing of gated cardiac blood pool data has be shown to been more accurate than standard frame-mode processing, but it has not gained widespread clinical use because of the difficulties associated with post-processing of the acquired data. We therefore investigated the possibility of performing the list-mode processing concurrently with the acquisition of the data, i.e. real-time list-mode processing. A programme for simultaneous acquisition and processing of gated cardiac images was written in assembly code and implemented on a personal computer. The programme was tested in phantom studies, then used in 200 consecutive patient examinations. Data could be concurrently acquired from the gamma-camera and processed with forward-backward framing at a great enough speed so that no loss of information occurred at up to 40000 counts per second, a value exceeding typical count rates observed in clinical practice. The ease-of-use and the clinical benefits of real-time list-mode processing suggest that it may become a standard method for gated examinations of the left ventricle in the near future.Offprint requests to: J.L. Lear |
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Keywords: | Gated blood pool imaging Ventricular function Computer processing Instrumentation |
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