SL Signed Long

Definition

Signed binary integer 32 bits long in 2's complement form. Represents an integer, n, in the range -2^31 ≤ n ≤ 2^31-1.

Attributes using SL

16 DICOM attributes declare this VR.

• (0014,4108) Integer Numeric Value IntegerNumericValue
• (0018,6020) Reference Pixel X0 ReferencePixelX0
• (0018,6022) Reference Pixel Y0 ReferencePixelY0
• (0018,6039) Doppler Sample Volume X Position DopplerSampleVolumeXPosition
• (0018,603B) Doppler Sample Volume Y Position DopplerSampleVolumeYPosition
• (0018,603D) TM-Line Position X0 TMLinePositionX0
• (0018,603F) TM-Line Position Y0 TMLinePositionY0
• (0018,6041) TM-Line Position X1 TMLinePositionX1
• (0018,6043) TM-Line Position Y1 TMLinePositionY1
• (0040,A162) Rational Numerator Value RationalNumeratorValue
• (0040,A29A) Pixel Coordinates Set (Trial) PixelCoordinatesSetTrial
• (0048,021E) Column Position In Total Image Pixel Matrix ColumnPositionInTotalImagePixelMatrix
• (0048,021F) Row Position In Total Image Pixel Matrix RowPositionInTotalImagePixelMatrix
• (0070,0052) Displayed Area Top Left Hand Corner DisplayedAreaTopLeftHandCorner
• (0070,0053) Displayed Area Bottom Right Hand Corner DisplayedAreaBottomRightHandCorner
• (0072,007C) Selector SL Value SelectorSLValue

Working with SL in integration code

VR-aware transformations are where most DICOM integration bugs hide — truncating a PN's 5-component structure, misaligning OB padding, or dropping leading zeros on IS. Saga IT builds production DICOM pipelines that respect VR semantics across Mirth Connect transformers, DIMSE gateways, and cloud DICOM services.