Assessing How Normal Variations in CT Scanning Affects Its Interpretation

Inclusion Criteria: * Patients ≥ 18 years of age on the day of signed informed consent * Patients scheduled and approved for contrast enhanced CT that includes imaging of the abdomen and pelvis following the Department of Radiology standard of care protocol as per local institutional guidelines * Patients with measurable colorectal liver metastases on prior imaging, with at least one tumor greater than 2.0 cm in axial maximal diameter Exclusion Criteria: * Patient who is pregnant and/or lactating * Patient scheduled for CT that includes the abdomen with a multiphasic contrast enhanced protocol (e.g. Triple Phase or Quadruple Phase Liver CT) * Patient who require reduced intravenous contrast dose based on the Department of Radiology contrast policy as per local institutional guidelines * Any other medical condition, including mental illness or substance abuse, deemed by the Investigator to be likely to interfere with a patient's ability to sign informed consent, cooperate and participate in the study, or follow up procedures