Clinical evaluation of Chang attenuation-correction parameterization for CT-free 177Lu SPECT organ quantification: implications for safety dosimetry.
BACKGROUND Quantitative post-therapy 177Lu SPECT depends on reliable attenuation correction. For centers without SPECT/CT, CT-free Chang attenuation correction is feasible, but its dependence on emission-derived body-contour thresholding requires validation. METHODS Twenty patients treated with 177Lu-DOTATATE underwe...