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Figure 8. Gated SPECT. (A) 3 short axis slices are shown at ED on the left and ES on the right. Note that the ventricle is smaller and brighter at ES. The increase in brightness is related to systolic thickening of the ventricular wall. On the right hand side of the panel, single VLA and HLA mid-ventricular slice are shown at ED and ES. (B) A program identifies the endocardial margins of the left ventricle for all frames and generates a volume curve from which the ejection fracture (EF) is derived.

Figure 8. Gated SPECT. (A) 3 short axis slices are shown at ED on the left and ES on the right. Note that the ventricle is smaller and brighter at ES. The increase in brightness is related to systolic thickening of the ventricular wall. On the right hand side of the panel, single VLA and HLA mid-ventricular slice are shown at ED and ES. (B) A program identifies the endocardial margins of the left ventricle for all frames and generates a volume curve from which the ejection fracture (EF) is derived.

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