Development of a motion detecting system for respiratory-gated PET using laser optical displacement sensor

A respiratory motion during whole-body imaging has been recognized as a source of image degradation and induces distortions in positron emission tomography (PET) study. The aim of this study is to evaluate respiratory motion using lung simulator and to develop a respiratory motion detecting system u...

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Bibliographic Details
Main Authors: Sang-Keun Woo, Tae Yong Song, Joon Yong Choi, Key Jo Hong, Yong Choi, Kyung-Han Lee, Byung-Tae Kim
Format: Conference Proceeding
Language:English
Subjects:
Laser noise
Motion detection
Optical detectors
Optical distortion
Optical imaging
Optical sensors
Positron emission tomography
Sensor systems
Stimulated emission
Whole-body PET
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Summary:A respiratory motion during whole-body imaging has been recognized as a source of image degradation and induces distortions in positron emission tomography (PET) study. The aim of this study is to evaluate respiratory motion using lung simulator and to develop a respiratory motion detecting system using optical laser sensor. We utilized a commercially available laser optical sensor to detect respiratory motion during PET scanning. Each respiratory cycle is divided into 4 bins defined as average peak interval and irregular peak within the patient's breathing motion. The acquired data within the time bins correspond to different positions within the breathing cycle and stored for the post motion correction. Artifact of breathing motion was evaluated with the phantom study. In the images of a human subject, the blurring artifact due to breathing motion was divided by our detecting system. This technique improves the quantitative specific activity of the tracer which is distorted by the respiratory motion.
ISSN:1082-3654
2577-0829
DOI:10.1109/NSSMIC.2003.1352255