MRI based assessment of the extent to which stereo-tracking of markers on the chest can predict Motion ofthe heart

Michael A. King, Joyoni Dey, Joseph E. McNamara, Karen Johnson, Joyeeta Mitra, Hendrik Pretorius, Andre Lehovich, Songxiang Gu, Ronn Walvick, Yanping Sun, John Ford

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)

Abstract

We have developed a visual-tracking-system (VTS) which uses stereo-imaging to track the motion of markers on patients during cardiac SPECT imaging with the goal of using the tracked motion to correct for patient motion. The aim of this study is to determine using MRI in volunteers if the rigid-bodymotion (RBM) model can be used to predict the motion of the heart within the chest from the motion of markers on the surface of the chest. Our methodology for investigating body-motion separate from the influence of respiration is to have the volunteer hold their breath during the acquisition of a sequence of 2 sets of EKG-triggered MRI sagittal slices covering the heart, the first set pre-motion and the second post-motion. We link the acquisition of these studies such that this process takes ∼ 45 seconds from the initiation of the first acquisition till the volunteer is given the instruction to resume breathing. An analysis of the combined motion of the individual markers on the chest is used to obtain an estimate of the six-degree-of-freedom (6DOF) RBM motion of the volunteer. The motion of the heart within the slices is estimated by semi-automatic 3D segmentation of the heart region in the second set of slices and subsequent registration of this region to the first set of slices. Studies in which the volunteer did not intentionally move between the 2 acquisitions were used to establish a baseline for agreement between the 2 methods of motion estimation for small motions. The agreement between the VTS and MRI estimates of motion was good in this "no-motion" case with a maximum difference of

Original languageEnglish (US)
Title of host publicationIEEE Nuclear Science Symposium Conference Record
Pages4306-4310
Number of pages5
DOIs
StatePublished - 2008
Externally publishedYes
Event2008 IEEE Nuclear Science Symposium Conference Record, NSS/MIC 2008 - Dresden, Germany
Duration: Oct 19 2008Oct 25 2008

Other

Other2008 IEEE Nuclear Science Symposium Conference Record, NSS/MIC 2008
CountryGermany
CityDresden
Period10/19/0810/25/08

Fingerprint

chest
markers
Thorax
Volunteers
acquisition
optical tracking
Respiration
respiration
estimates
breathing
Single-Photon Emission-Computed Tomography

ASJC Scopus subject areas

  • Radiation
  • Nuclear and High Energy Physics
  • Radiology Nuclear Medicine and imaging

Cite this

King, M. A., Dey, J., McNamara, J. E., Johnson, K., Mitra, J., Pretorius, H., ... Ford, J. (2008). MRI based assessment of the extent to which stereo-tracking of markers on the chest can predict Motion ofthe heart. In IEEE Nuclear Science Symposium Conference Record (pp. 4306-4310). [4774236] https://doi.org/10.1109/NSSMIC.2008.4774236

MRI based assessment of the extent to which stereo-tracking of markers on the chest can predict Motion ofthe heart. / King, Michael A.; Dey, Joyoni; McNamara, Joseph E.; Johnson, Karen; Mitra, Joyeeta; Pretorius, Hendrik; Lehovich, Andre; Gu, Songxiang; Walvick, Ronn; Sun, Yanping; Ford, John.

IEEE Nuclear Science Symposium Conference Record. 2008. p. 4306-4310 4774236.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

King, MA, Dey, J, McNamara, JE, Johnson, K, Mitra, J, Pretorius, H, Lehovich, A, Gu, S, Walvick, R, Sun, Y & Ford, J 2008, MRI based assessment of the extent to which stereo-tracking of markers on the chest can predict Motion ofthe heart. in IEEE Nuclear Science Symposium Conference Record., 4774236, pp. 4306-4310, 2008 IEEE Nuclear Science Symposium Conference Record, NSS/MIC 2008, Dresden, Germany, 10/19/08. https://doi.org/10.1109/NSSMIC.2008.4774236
King MA, Dey J, McNamara JE, Johnson K, Mitra J, Pretorius H et al. MRI based assessment of the extent to which stereo-tracking of markers on the chest can predict Motion ofthe heart. In IEEE Nuclear Science Symposium Conference Record. 2008. p. 4306-4310. 4774236 https://doi.org/10.1109/NSSMIC.2008.4774236
King, Michael A. ; Dey, Joyoni ; McNamara, Joseph E. ; Johnson, Karen ; Mitra, Joyeeta ; Pretorius, Hendrik ; Lehovich, Andre ; Gu, Songxiang ; Walvick, Ronn ; Sun, Yanping ; Ford, John. / MRI based assessment of the extent to which stereo-tracking of markers on the chest can predict Motion ofthe heart. IEEE Nuclear Science Symposium Conference Record. 2008. pp. 4306-4310
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