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
  112140	Sharply demarcated	The border of a shadow (opacity) is sharply distinct from adjacent structures [Fraser and Pare].
  112141	Poorly demarcated	The border of a shadow (opacity) is poorly distinct from adjacent structures [Fraser and Pare].
  112137	Sharply defined	The border of a shadow (opacity) is sharply defined [Fraser and Pare].
  112138	Distinctly defined	The border of a shadow (opacity) is distinctly defined [Fraser and Pare].
  112139	Well demarcated	The border of a shadow (opacity) is well distinct from adjacent structures [Fraser and Pare].

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

  Code	Display
  300841009	Poorly defined
  260409000	Well defined
  263706005	Circumscribed