PURPOSE: We investigated whether images of stationary objects obtained by segmental acquisition with positron emission tomography using 2-deoxy-2-[(18)F]-fluoro-D: -glucose (FDG-PET) are of a quality equivalent to those obtained by conventional continuous acquisition. MATERIALS AND METHODS: Phantoms filled with FDG and mid-abdominal regions of 18 patients who underwent FDG-PET tests were imaged by both continuous and segmental acquisition methods. The total acquisition time was set to 3 min; in the segmental acquisition mode, imaging for 15 s was repeated 12 times. Segmental images (SIs) obtained by superimposition of the reconstructed images were compared quantitatively and visually with continuous images (CIs). RESULTS: In all the phantom and clinical studies, SIs were never worse than CIs. The variances of the background counts of SIs were 9.8% and 13.0% less those of CIs in phantom and clinical studies, respectively. Visual assessments showed that SIs provided better detection of hot areas and superior image quality when compared to CIs. CONCLUSION: For stationary objects, the quality of images obtained by the segmental method is equivalent to that of images obtained conventionally by continuous acquisition. Moreover, under some conditions SIs provide better results than CIs.
PURPOSE: We investigated whether images of stationary objects obtained by segmental acquisition with positron emission tomography using 2-deoxy-2-[(18)F]-fluoro-D: -glucose (FDG-PET) are of a quality equivalent to those obtained by conventional continuous acquisition. MATERIALS AND METHODS: Phantoms filled with FDG and mid-abdominal regions of 18 patients who underwent FDG-PET tests were imaged by both continuous and segmental acquisition methods. The total acquisition time was set to 3 min; in the segmental acquisition mode, imaging for 15 s was repeated 12 times. Segmental images (SIs) obtained by superimposition of the reconstructed images were compared quantitatively and visually with continuous images (CIs). RESULTS: In all the phantom and clinical studies, SIs were never worse than CIs. The variances of the background counts of SIs were 9.8% and 13.0% less those of CIs in phantom and clinical studies, respectively. Visual assessments showed that SIs provided better detection of hot areas and superior image quality when compared to CIs. CONCLUSION: For stationary objects, the quality of images obtained by the segmental method is equivalent to that of images obtained conventionally by continuous acquisition. Moreover, under some conditions SIs provide better results than CIs.
Authors: Tinsu Pan; Osama Mawlawi; Sadek A Nehmeh; Yusuf E Erdi; Dershan Luo; Hui H Liu; Richard Castillo; Radhe Mohan; Zhongxing Liao; H A Macapinlac Journal: J Nucl Med Date: 2005-09 Impact factor: 10.057
Authors: Heiko Schöder; Yusuf E Erdi; Kenneth Chao; Mithat Gonen; Steven M Larson; Henry W D Yeung Journal: J Nucl Med Date: 2004-04 Impact factor: 10.057
Authors: C Burger; G Goerres; S Schoenes; A Buck; A H R Lonn; G K Von Schulthess Journal: Eur J Nucl Med Mol Imaging Date: 2002-04-19 Impact factor: 9.236
Authors: Klaus Strobel; Matthias Rüdy; Valerie Treyer; Patrick Veit-Haibach; Cyrill Burger; Thomas F Hany Journal: Nucl Med Commun Date: 2007-07 Impact factor: 1.690