title: Value of automatic patient motion detection and correction in myocardial perfusion imaging using a CZT-based SPECT camera.
abstract: Correction of motion has become feasible on cadmium-zinc-telluride (CZT)-based SPECT cameras during myocardial perfusion imaging (MPI). Our aim was to quantify the motion and to determine the value of automatic correction using commercially available software.
  
  
  
  We retrospectively included 83 consecutive patients who underwent stress-rest MPI CZT-SPECT and invasive fractional flow reserve (FFR) measurement. Eight-minute stress acquisitions were reformatted into 1.0- and 20-second bins to detect respiratory motion (RM) and patient motion (PM), respectively. RM and PM were quantified and scans were automatically corrected. Total perfusion deficit (TPD) and SPECT interpretation-normal, equivocal, or abnormal-were compared between the noncorrected and corrected scans. Scans with a changed SPECT interpretation were compared with FFR, the reference standard. Average RM was 2.5 ± 0.4 mm and maximal PM was 4.5 ± 1.3 mm. RM correction influenced the diagnostic outcomes in two patients based on TPD changes ≥7% and in nine patients based on changed visual interpretation. In only four of these patients, the changed SPECT interpretation corresponded with FFR measurements. Correction for PM did not influence the diagnostic outcomes.
  
  
  
  Respiratory motion and patient motion were small. Motion correction did not appear to improve the diagnostic outcome and, hence, the added value seems limited in MPI using CZT-based SPECT cameras.
authors.affiliation: Department of Nuclear Medicine, Isala Hospital, PO Box 10400, 8000, Zwolle, GK, The Netherlands. jorisvdijk@gmail.com.|MIRA: Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, The Netherlands. jorisvdijk@gmail.com.
authors.forename: Joris D
authors.initials: JD
authors.lastname: van Dijk
authors.affiliation: Department of Medical Physics, Isala Hospital, Zwolle, The Netherlands.
authors.forename: Jorn A
authors.initials: JA
authors.lastname: van Dalen
authors.affiliation: Department of Cardiology, Isala Hospital, Zwolle, The Netherlands.
authors.forename: Mohamed
authors.initials: M
authors.lastname: Mouden
authors.affiliation: Department of Cardiology, Isala Hospital, Zwolle, The Netherlands.
authors.forename: Jan Paul
authors.initials: JP
authors.lastname: Ottervanger
authors.affiliation: Department of Nuclear Medicine, Isala Hospital, PO Box 10400, 8000, Zwolle, GK, The Netherlands.
authors.forename: Siert
authors.initials: S
authors.lastname: Knollema
authors.affiliation: MIRA: Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, The Netherlands.
authors.forename: Cornelis H
authors.initials: CH
authors.lastname: Slump
authors.affiliation: Department of Nuclear Medicine, Isala Hospital, PO Box 10400, 8000, Zwolle, GK, The Netherlands.
authors.forename: Pieter L
authors.initials: PL
authors.lastname: Jager
mesh_terms: D000368:Aged; D002104:Cadmium; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D008297:Male; D008875:Middle Aged; D009038:Motion; D055414:Myocardial Perfusion Imaging; D010363:Pattern Recognition, Automated; D012015:Reference Standards; D015203:Reproducibility of Results; D012119:Respiration; D012189:Retrospective Studies; D012984:Software; D013691:Tellurium; D015899:Tomography, Emission-Computed, Single-Photon / Q000295:instrumentation*; D015032:Zinc
chemical_list: C474490:CdZnTe; D002104:Cadmium; D015032:Zinc; D013691:Tellurium
keywords: Myocardial perfusion imaging (MPI); cadmium-zinc-telluride (CZT); motion correction; patient motion; respiratory motion