Med Phys. 2007 Nov;34(11):4472-5.

A method for synchronizing an external respiratory signal with a list-mode PET acquisition.

Bruyant PP, Cheze Le Rest C, Turzo A, Jarritt P, Carson K, Visvikis D.

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INSERM, U650, Brest, F-29200, France. pbruyant@yahoo.com

Abstract

A method is proposed to synchronize positron emission tomography (PET) list-mode data with an externally recorded respiratory signal in the absence of a master clock. When the respiratory signal reaches a user-defined threshold, a trigger mark is stored in the list-mode file. After the acquisition, synchronization is achieved when the stored trigger marks are superimposed on the respiratory curve to form a horizontal line over time at the user-defined threshold. Synchronization was possible and unequivocal for ten out of ten clinical studies. The list-mode acquisition actually started approximately 40 and 4 s after acquisition initiation at the user interface of the Philips Gemini and the GE DLS PET-CT systems, respectively.

PMID:: 18072511; [PubMed - indexed for MEDLINE]

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