FIGURE 1.  Anterior-view ^99mTc-HMPAO WBC scans (left) and ^99mTc-MDP bone scans (right). (A) Images of patient with negative ^99mTc-HMPAO findings but positive ^99mTc-MDP findings, showing regions of interest drawn on suspected site of abnormality and on contralateral normal site. (B) Patient with positive findings on both types of scans.