Skip to main content
. Author manuscript; available in PMC: 2010 Jun 9.
Published in final edited form as: IEEE Trans Nucl Sci. 2009 Feb;56(1):147–155. doi: 10.1109/TNS.2008.2010319

Fig. 4.

Fig. 4

(Top) Example of periodic respiratory motion (PM) signal extracted from an abdominal marker’s Y-axis (vertical) signal, and the body-motion (BM) extracted from the same marker. The BM signal shows a downward trend in the first 4 min. along with slow sinusoidal variations in amplitude. These trends actually correspond to changes in the respiration of the patient and not real motion. (Bottom) The respiratory trends are subtracted from the BM and added to the PM signal to get the final RM signal that would be used for correction of respiratory motion of the heart.