Similar Procedures
        Modalities are the same or similar
        Interventional overlap is same or partial
        All regions in the Reference study are present in the similar study
        Angio overlap is same or partial
        Contrast overlap is same or partial
        
    
    
        
Related Prior Procedures
        Relate all body system equivalencies
        Angio overlap is same or partial
        Include all CT and MR for related region overlap
        For Bone studies exclude Soft studies
        For Soft studies exclude Bone studies
        Include related modalities for related region overlap with angio exclusion for bony studies
    
    
        
Overlapping Procedures
        Related procedure overlaps partially or completely.
    
    
        
Adjacent Procedures
        Related procedure includes at least one adjacent extension of a body region.
    
    
        
Unrelated Procedures
        Any related procedure not assessed as similar, related, overlapping, or adjacent.