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3D SPECT Lungs' FBP reconstruction by Hann filter (critical frequency 0.9) and Chang attenuation correction order 0, coefficient 0.11. (a) 4 hours postevent, Right lobe embolism, R lobe volume 0.66 lt, and total lungs' volume 2.85 lt. (b) 11 days posttherapy, R lobe volume 3.28 lt, and total lungs' volume 5.28 lt. [37] (modified).
