This topic provide an example of a common parsing scenario used in field mapping expressions in Source Manager. Field mappings are used to extract and manipulate study data.
In this scenario, the modality can populate only one element in the image header with data entered at its console. For example, assume that only the patient name field can be populated at the modality. The technologist has been instructed to type the patient ID, followed by accession number, followed by patient name, as one string into the Patient Name field of the modality, with the forward slash (/) character as a separator for the fields.
The patient name element of the image header has DICOM Data Element tag (0010,0010), so to parse out the patient ID and accession number, use the following expressions:
| Element to extract | Expression to use |
|---|---|
| Patient ID | subfield( getdicomstring( 0x100010 ), 0, '/' ) |
| Accession number | subfield( getdicomstring( 0x100010), 1, '/' ) |
 | Note: When the system validates the image’s study data via Modality Worklist query, it automatically overwrites the patient name element with the correct data from the HIS or RIS. |