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Image Reconstruction Using Filtered Backprojection and Iterative Method: Effect on Motion Artifacts in Myocardial Perfusion SPECT

Seyed Rasoul Zakavi, Amin Zonoozi, Vahidreza Dabbagh Kakhki, Mohsen Hajizadeh, Mehdi Momennezhad and Kamran Ariana
Journal of Nuclear Medicine Technology December 2006, 34 (4) 220-223;

Article Figures & Data

Figures

  • FIGURE 1. 
    FIGURE 1. 

    Schematic display of different kinds of motion used for simulation: early-phase returning shift (A), middle-phase returning shift (B), late-phase returning shift (C), early-phase nonreturning shift (D), middle-phase nonreturning shift (E), and late-phase nonreturning shift (F).

  • FIGURE 2. 
    FIGURE 2. 

    Mean summed score in returning and nonreturning shifts by 2 different reconstruction techniques. Statistical comparison was done between reconstruction techniques in each group.

  • FIGURE 3. 
    FIGURE 3. 

    Mean summed score in shifted images compared in early, middle, and late phases of acquisition with respect to reconstruction technique and type of shifting. R = returning shift; NR = nonreturning shift.

Tables

  • TABLE 1

    Qualitative Scan Interpretation

    Reconstruction methodAll imagesReturning shiftNonreturning shift
    FBP68.1% (49/72)44.4% (16/36)91.7% (33/36)
    OSEM70.8% (51/72)50% (18/36)91.7% (33/36)

    • Data are percentages and numbers of abnormal images. Minimum P value was more than 0.5 for all comparisons between reconstruction techniques.

  • TABLE 2

    Number of Defects in 72 Shifted Images

    Reconstruction segmentFBPOSEMP
    Apex23210.62
    Anteroapical41430.62
    Apicolateral551
    Inferoapical34341
    Apicoseptal10120.68
    Mid anterior26280.72
    Mid anteroseptal23290.14
    Mid anterolateral570.62
    Mid inferoseptal10130.25
    Mid inferolateral871
    Mid inferior21240.37
  • TABLE 3

    Percentage of Defects in Each Segment

    Motion axis segmentxyP*
    Apex38.919.40.12
    Anteroapical69.4500.15
    Apicolateral30.663.90.009
    Inferoapical8.35.61
    Apicoseptal30.62.80.003
    Mid anterior36.141.70.81
    Mid anteroseptal38.941.71
    Mid anterolateral11.18.31
    Mid inferoseptal22.213.90.54
    Mid inferolateral8.311.11
    Mid inferior11.157.10.001

    • ↵* Fisher exact test was used for comparisons.

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