SNM Annual Meeting Abstracts
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     



J Nucl Med. 2008; 49 (Supplement 1):417P
This Article
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Google Scholar
Right arrow Articles by Johnson, K.
Right arrow Articles by King, M.
PubMed
Right arrow Articles by Johnson, K.
Right arrow Articles by King, M.

Technologist Abstracts

Technologist Papers III

Motion monitoring of stress/rest cardiac-perfusion imaging patients using a motion-tracking system

K. Johnson1, J. Ulansky1, V. Lott1, M. DiBonaventura1, P. Torres1, A. Padeni1, D. Ryan1, J. McNamara1, J. Mitra1 and M. King1

1 Nuclear Medicine, UMass Med School, Worcester, Massachusetts

2017

Objectives: We have incorporated a motion-tracking system into our stress/rest cardiac-SPECT imaging protocols which provides us a unique opportunity to monitor patient motion. Our objective is to characterize the nature, frequency, and extent of patient motion during cardiac SPECT imaging.

Methods: The motion-tracking system consists of 5 infrared cameras positioned at the head and foot of the SPECT gantry. The 3D motion of retro-reflective spheres attached to stretchy bands wrapped about the abdomen and chest of patients is tracked at 30 fps using stereo between any pairs of cameras seeing each sphere. Under IRB approval and with informed consent we have monitored thus far 30 patients undergoing Tl-201 stress/rest perfusion imaging. The tracked motion is separated into periodic respiratory and nonperiodic body motion categories. Nonperiodic motion is then further categorized as: 1)a gradual change in respiration producing upward creep; 2)an abrupt change in patient location; 3)other types of motion.

Results: The chest markers had a large nonperiodic component and the abdominal markers had a large periodic component. In studies analyzed so far the amplitude of respiratory motion diminished during exercise imaging on average 7mm, and remained fairly constant during rest. In both stress and rest there was a downward trend in the A/P sphere location. Spikes in all motion components occurred with acquisition transitions, such as changes in radius or direction.

Conclusions: With physical stress, patients breathed deeper and in some, a significant upward creep was noted. With pharmacologic stress and rest imaging, less motion was noted in general. With sequential emission/transmission imaging, patients were seen to move between imaging modes.

Research Support: NIBIB grant R01 EB001457





This Article
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Google Scholar
Right arrow Articles by Johnson, K.
Right arrow Articles by King, M.
PubMed
Right arrow Articles by Johnson, K.
Right arrow Articles by King, M.