Details

Autor(en) / Beteiligte

• Chi Liu
• Chung Chan
• Harris, M.
• Le, M.
• Biondi, J.
• Volokh, L.
• Sinusas, A.

Titel

Respiratory gating for a stationary dedicated cardiac SPECT system

Ist Teil von

• 2011 IEEE Nuclear Science Symposium Conference Record, 2011, p.2898-2901

Ort / Verlag

IEEE

Erscheinungsjahr

2011

Quelle

IEEE Xplore

Beschreibungen/Notizen

• Respiratory motion correction is challenging for conventional SPECT systems due to slow rotational data acquisition that leads to inconsistent temporal data. In this study, we developed respiratory gating techniques for a commercially available stationary cardiac SPECT system with multiple pinhole collimators, which acquire all projections simultaneously and avoid the limitation of slow gantry rotation. Respiratory motion was monitored by a compressive sensor attached to the patient/large animal's lower chest and/or upper abdomen. Respiratory triggers at each end-inspiration peak or cardiac triggers only during end-expiration phases were sent to the GE 570c SPECT/CT system. Respiratory-gated and end-expiration gated images were generated and evaluated with respect to ungated images visually, and quantitatively using contrast recovery on a physical phantom, a canine study and human studies. The results demonstrated that respiratory gating can effectively improve the image quality and contrast for the stationary myocardial perfusion SPECT imaging.