This value set includes codes based on the following rules:

• Include these codes as defined in http://dicom.nema.org/resources/ontology/DCM

  Code	Display	Definition
  125316	Directly measured	The measurement is a direct output of the measurement tool.
  125315	Calculated	The measurement is calculated by incorporating one or more measured values into an equation other than a ratio, fractional change or indexed calculation.
  125314	Fractional Change	The measurement is a change value expressed as a fraction of its baseline value. E.g. cardiac ejection fraction or fractional shortening.
  125313	Indexed	The measurement has been normalized by dividing it by an index value (such as Body Surface Area).
  113857	Manual Entry	Recording of data by a human operator, including manual transcription of electronic data.

• Include these codes as defined in http://snomed.info/sct

  Code	Display
  118586006	Ratio