Fig. 4From: The determination of the optimal threshold on measurement of thyroid volume using quantitative SPECT/CT for Graves' hyperthyroidismBland–Altman Consistency Analysis Diagram. A Bland–Altman diagram of thyroid volume measured by SPECT/CT 25% threshold and ultrasound. B Bland–Altman diagram of thyroid volume measured by planar imaging method and ultrasoundBack to article page