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Preoperative gated SPECT imaging in a A 78-year-old woman with a small heart (height 142 cm, weight 43 kg, BSA 1.17 m2). The EFs calculated using ExH and QGS were 76 % and 93 %, respectively. Echocardiography showed EDV 64 mL, ESV 15 mL and EF 77 % by Teichholz’s formula
