|Cumulative Duration of Training||Minimum Number of Mentored Examinations Performed||Minimum Number of Mentored Examinations Interpreted|
|Level 1||4 weeks⁎||—||50†|
|Level 2—non-contrast||4 weeks⁎||50||150†|
|Level 2—contrast||8 weeks⁎||50||150†|
|Level 3||6 months⁎||100||300†|
↵⁎ This represents cumulative time spent interpreting, performing, and learning about CCT, and need not be a consecutive block of time, but at least 50% of the time should represent supervised laboratory experience. In-lab training time is defined as a minimum of 35 h/week.
↵† The case load recommendations may include studies from an established teaching file, previous CCT cases, journals and/or textbooks, or electronic/on-line courses/CME.