Modalities in Study (0008,0061)

Mirth Connect Example

// (0008,0061) Modalities in Study — CS, backslash-separated unique modality set
var seriesMods = channelMap.get('study_modalities'); // populated over series of C-STOREs
var modSet = {};
if (seriesMods) { String(seriesMods).split(',').forEach(function (m) { if (m) modSet[m.toUpperCase()] = true; }); }
// Add the current series' modality if Q/R assembly is in-flight
var current = String(msg.dataset.attr.(@tag == '00080060').value).trim().toUpperCase();
if (current) modSet[current] = true;
var mods = Object.keys(modSet).sort();
channelMap.put('modalities_in_study', mods.join(','));
// Write back to outbound DICOM as backslash-separated CS
tmp.dataset.attr.(@tag == '00080061').value = mods.join('\\');

Reference only — validate before production. Snippets are starting points, not turnkey solutions. Always test against your channel's specific message structure and your facility's interface specification. See Mirth Connect User Guide + NEMA PS3.6 + your vendor conformance statement for authoritative specification.

Common Operational Errors

• high ModalitiesInStudy stale after series ingestion

  Diagnosis: PACS is SCP for multiple modalities sending to the same study. First series arrives with ModalitiesInStudy='CT'; later PET series adds to the same study but the archived ModalitiesInStudy stays 'CT' because the initial ingestion wrote it and no re-aggregation runs. Q/R by ModalitiesInStudy=PT then misses the study entirely.

  Fix: On every C-STORE, recompute ModalitiesInStudy by aggregating over all series Modality values. Most mature PACS do this; home-grown archives and thin DICOM gateways often don't.

Reference only — validate before applying a fix. Scenarios are drawn from common DICOM/HL7 v2 integration patterns; reproduce against your environment before acting on any diagnosis. See NEMA PS3.6 + your vendor conformance statement for authoritative specification. Severity levels: high (data-loss / patient-safety), medium (workflow disruption), low (cosmetic).