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The Patient Identifiers (PIDs), in DICOM tag (0010, 0020) Patient ID, are 6 digit random numbers assigned by IMS.  They are called IMS-Global-IDs. PIDs beginning with '1' are LSS images; those beginning with '2' are ACRIN images.; examples:

  • 101337 is an LSS PID
  • 208344 is an ACRIN PID

Prior ACRIN and LSS PIDs may be found in 2 DICOM tags:  (0010, 1000) Other Patient IDs and (0013, 0040) Clinical Trial Subject ID.  These prior PIDs are random 4- or 5-digit (ACRIN) or 6-digit (LSS) numbers that contain no screening site information; the LSS prior PIDs may have leading zeroes which may or may not appear unless specified that they do so.; examples:

  • 2542 is an ACRIN prior PID
  • 18519 is an ACRIN prior PID
  • 022921 is an LSS prior PID that may also be rendered as 22921
Patient Names

Patient Names appearing in DICOM tag (0010, 0010) are a construct from the participant's prior PID concatenated with a caret and the string 'ACRIN' or 'LSS'; examples:

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