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Clinical evaluation of three respiratory gating schemes for different respiratory patterns on cardiac SPECT
Zhang,Duo1; Sun,Jingzhang1; Pretorius,P. Hendrik2; King,Michael2; Mok,Greta S.P.1,3
Source PublicationMedical Physics

Purpose: Respiratory gating reduces respiratory blur in cardiac single photon emission computed tomography (SPECT). It can be implemented as three gating schemes: (a) equal amplitude-based gating (AG); (b) phase or time-based gating (TG); or (c) equal count-based gating (CG), that is, a variant of amplitude-based method. The goal of this study is to evaluate the effectiveness of these respiratory gating methods for patients with different respiratory patterns in myocardial perfusion SPECT. Methods: We reviewed 1274 anonymized patient respiratory traces obtained via the Vicon motion-tracking system during their Tc-sestamibi SPECT scans and grouped them into four breathing categories: (a) regular respiration (RR); (b) periodic respiration (PR); (c) respiration with apnea (AR); and (d) unclassified respiration (UR). For each respiratory pattern, 15 patients were randomly selected and their list-mode data were rebinned using the three gating schemes. A preliminary reconstruction was performed for each gate with the heart region segmented and registered to a reference gate to estimate the respiratory motion. A final reconstruction incorporating respiratory motion correction was done to get a final image set. The estimated respiratory motion, the full-width-at-half-maxima (FWHM) measured across the image intensity profile of the left ventricle wall, as well as the normalized standard deviation measured in a uniform cuboid region of the thorax were analyzed. Results: There are 47.1%, 24.3%, 13.5%, and 15.1% RR, PR, AR, and UR patients, respectively, among the 1274 patients in this study. The differences among the three gating schemes in RR were smaller than other respiratory patterns. The AG and CG methods showed statistically larger motion estimation than TG particularly in the AR and PR patterns. Noise of AG varied more in different gates, especially for AR and UR patterns. Conclusion: More than half of the patients reviewed exhibited nonregular breathing patterns. Amplitude-based gating, that is, AG and CG, is a preferred gating method for such patterns and is a robust respiratory gating implementation method given the respiratory pattern of the patients is unknown before data acquisition. Phase gating is also a feasible option for regular respiratory pattern.

KeywordBreathing Pattern Cardiac Spect Respiratory Gating
URLView the original
Indexed BySCIE
WOS Research AreaRadiology, Nuclear Medicine & Medical Imaging
WOS SubjectRadiology, Nuclear Medicine & Medical Imaging
WOS IDWOS:000549366100001
Scopus ID2-s2.0-85088122919
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Cited Times [WOS]:9   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
Corresponding AuthorMok,Greta S.P.
Affiliation1.Biomedical Imaging Laboratory (BIG),Department of Electrical and Computer Engineering,Faculty of Science and Technology,University of Macau,Macao
2.Department of Radiology,University of Massachusetts Medical School,Worcester,United States
3.Center for Cognitive and Brain Sciences,Institute of Collaborative Innovation,University of Macau,Macao
First Author AffilicationFaculty of Science and Technology
Corresponding Author AffilicationFaculty of Science and Technology;  INSTITUTE OF COLLABORATIVE INNOVATION
Recommended Citation
GB/T 7714
Zhang,Duo,Sun,Jingzhang,Pretorius,P. Hendrik,et al. Clinical evaluation of three respiratory gating schemes for different respiratory patterns on cardiac SPECT[J]. Medical Physics,2020,47(9):4223-4232.
APA Zhang,Duo,Sun,Jingzhang,Pretorius,P. Hendrik,King,Michael,&Mok,Greta S.P..(2020).Clinical evaluation of three respiratory gating schemes for different respiratory patterns on cardiac SPECT.Medical Physics,47(9),4223-4232.
MLA Zhang,Duo,et al."Clinical evaluation of three respiratory gating schemes for different respiratory patterns on cardiac SPECT".Medical Physics 47.9(2020):4223-4232.
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