Cluster 375: mri ct scan disease measurable tumor imaging evidence days bone 
Cluster 447: tomography ct computed pet emission positron measurable scan disease cm 
Cluster 478: ct chest abdomen pelvis scan tomography imaging computed mri contrast 
Cluster 1099: imaging resonance magnetic tomography computed ct mri scan measurable disease 
Cluster 1451: tomography emission positron pet ct computed scan imaging disease mri