The interobserver agreement of experienced readers was generally high in SPECT/CT concerning lesion detection ( kappa 0.93 , MRI 0.72 ) , localisation ( kappa 0.91 , MRI 0.75 ) and etiology ( kappa 0.85 , MRI 0.74 ) , while MRI yielded better results on typification of lesions ( kappa 0.75 , SPECT/CT 0.69 ) .