A method for synchronizing an external respiratory signal with a list-mode PET acquisition.
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.
Bruyant
P P
PP
INSERM, U650, Brest, F-29200, France. pbruyant@yahoo.com
Cheze Le Rest
C
C
Turzo
A
A
Jarritt
P
P
Carson
K
K
Visvikis
D
D
D000465:Algorithms; D004562:Electrocardiography / Q000295:instrumentation / Q000379:methods*; D004867:Equipment Design; D019788:Fluorodeoxyglucose F18 / Q000494:pharmacology; D006801:Humans; D007089:Image Enhancement; D007090:Image Interpretation, Computer-Assisted; D007091:Image Processing, Computer-Assisted; D019047:Phantoms, Imaging; D049268:Positron-Emission Tomography / Q000295:instrumentation / Q000379:methods*; D019275:Radiopharmaceuticals / Q000494:pharmacology; D012119:Respiration; D013997:Time Factors
D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18