DICOM Attribute

Reconstruction Start Location Sequence (0018,993B)

Keyword
ReconstructionStartLocationSequence
VR
SQ
VM
1

Definition

Anatomically oriented transverse location where this reconstruction starts. Only a single Item is permitted in the Sequence. This represents the start of the data used in the reconstruction, not necessarily the slice location of the first reconstructed slice. This represents the intended start location. The operator may or may not have selected a location that exactly matches this anatomical location. In the case where an anatomical reference basis cannot be determined or derived from the Defined Protocol Instance, for example when an ad hoc reconstruction is being performed, the implementation may use the acquired volume as the reference basis with an appropriate offset. (128160, DCM, "Acquired Volume")

From NEMA PS3.3 §C.34.12.

Attribute Metadata

Tag
(0018,993B)
Keyword
ReconstructionStartLocationSequence
Name
Reconstruction Start Location Sequence
Value Representation (VR)
SQ
Value Multiplicity (VM)
1
Status
Active
Source
NEMA PS3.6 (table_6-1)

This attribute is part of the current DICOM Standard. Its value representation is SQ with multiplicity 1.

Used in 1 Module

This attribute uses the SQ Value Representation. Multiplicity 1 governs how many values may be encoded.

Integration Notes

Real-world integration guidance for engineers implementing this attribute in Mirth Connect, FHIR gateways, HL7 v2 bridges, and cloud DICOM services. Authoritative source data where available; reference examples and operational notes where they add value.

FHIR Mapping

No direct FHIR ImagingStudy mapping published for this attribute. Some tags map indirectly via the Patient, Endpoint, or ImagingSelection resources — Phase 2b will expand coverage to those.

HL7 v2 Equivalent

No standard HL7 v2 equivalent published for this attribute. Imaging-only attributes (Image Pixel data, technical acquisition parameters, modality-specific values) typically have no HL7 v2 carrier.

Cloud DICOM Support

AWS HealthImaging, Azure DICOM, and GCP Healthcare DICOM coverage rolls out by attribute. The QIDO-RS matching keys + Patient/Study/Series core (~50 attributes) are documented; lower-traffic attributes will be added as Saga teams encounter them in production.

Real-World Sample Values

No representative sample value available — this attribute isn't present in the de-identified pydicom fixture set. Add a fixture covering this attribute to expand coverage.

Mirth Connect Example

JavaScript transformer snippets for the most-queried tags will be added as coverage expands.

Common Operational Errors

Operational error patterns for the most-queried tags will be added as coverage expands.

DICOM Integration Services

Saga IT builds production DICOM integrations across Mirth Connect, FHIR gateways, and cloud imaging platforms. If you're working with ReconstructionStartLocationSequence or the broader (0018,993B) context: