| Rationale for Correction:
Anatomically, the term "median" is reserved for the mid-sagittal plane rather than being a generic qualifier meaning in the middle of some larger region regardless of orientation.
There is a need to distinguish "median" versus "middle" for various uses in the standard (e.g., to distinguish middle part of something from inferior/superior or anterior/posterior parts), even though SNOMED CT considers these synonyms.
Retire the use of the single SNOMED CT concept for middle/median and use distinct clearly defined codes.
[Ed.Note: In the absence of a definition, it is probably better to avoid the use of SCT:399488007 SRT:R-40997 "Midline (qualifier value)" as a substitute for "median".]
[Ed.Note: The definition of NCIt:C25569 "Middle" is "An intermediate part or section; an area that is approximately central within some larger region".]
[Ed.Note: SCT:272442009 SRT:R-40860 "Mid-location (qualifier value)" is another potential candidate for "middle", not currently used in DICOM.]
[Ed.Note: SNOMED CT does actually contain a concept SCT:272428001 "anatomical third", which has children of:
Distal third
Lower third
Middle third
Proximal third
Upper third
but it is incomplete (missing anterior/posterior thirds) and its use might be confusing given existing widespread use of generic distal/proximal and inferior/superior concepts. Should these be added to the Generic Anatomic Location Modifiers context group and a request to SNOMED made for anterior/posterior thirds?]
[Ed.Note: Should CID 12281 Cardiac Ultrasound Target Site Modifiers context group be merged with/replaced by/replace Generic Anatomic Location Modifiers?]
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