Inclusion Criteria:  Participant meets standard criteria for VT ablation and is scheduled for VT ablation by their cardiologist or electrophysiologist 18 to 85 years of age VT and ischemic cardiomyopathy A pre-procedure MRI with LGE is available (performed within 1 year of procedure, unless an MI has occurred since MRI) with adequate image for analysis Participant is able and willing to provide written informed consent  Exclusion Criteria:  Contradiction to MRI (except those with MRI compatible pacemaker/ICD/CRT devices implanted or site has approved procedure for MRI of non-compatible devices). Participant implanted with an LVAD. Enrolled in another non-imaging intervention assignment study that could confound the results of this study.