Method and apparatus for data selection for positron emission tomogrpahy (pet) image reconstruction

An imaging system comprising:

• a detector;
• and
• a computer coupled to the detector, the computer being programmed to:
• acquire a 3D emission dataset of the subject of interest;
• acquire a respiratory signal of the subject of interest, the respiratory signal including a plurality of respiratory cycles;
• calculate a respiratory profile using the respiratory signal;
• for each respiratory cycle, generate a gating window, calculate a minimum total squared difference (TSD) between a plurality of phases in the respiratory profile and the same plurality of phases in the respiratory cycle, and position the gating window based on the TSD values calculated;
• and
• reconstruct a 3D image using only the emission data within the plurality of gated windows.

A non-transitory computer readable medium encoded with a program programmed to instruct a computer to:

• acquire a 3D emission dataset of the subject of interest;
• acquire a respiratory signal of the subject of interest, the respiratory signal including a plurality of respiratory cycles;
• calculate a respiratory profile using the respiratory signal;
• for each respiratory cycle, generate a gating window, calculate a minimum total squared difference (TSD) between a plurality of phases in the respiratory profile and the same plurality of phases in the respiratory cycle, and position the gating window such that the TSD is minimized;
• and
• reconstruct a 3D image using only the emission data within the plurality of gated windows.