Skip to main content
Version: v0.0.3

Interface: ImageView

Pixel-interpretation + geometry metadata (§4.2 / §4.3 / §4.4 / §4.5) - the "wrong pixels look fine" and "looks fine, measures wrong" classes. v1 does not decode pixels; this view surfaces exactly what a renderer needs so it does not have to guess.

Safety-critical omissions are intentional: rescaleSlope is absent (not 1) when the tag is absent; signed is absent (not a guess) unless (0028,0103) was present; photometricInterpretation is absent (not MONOCHROME2) when absent; the three pixel-spacing fields are distinct. When modalityLutSequence / voiLutSequence are present they are authoritative over the linear rescale* / window* pairs.

Example​

import { parseDicom } from "@cosyte/dicom";
const img = parseDicom(buf).image;
img.rescaleSlope; // undefined ⇒ caller MUST NOT assume 1
img.signed;       // undefined ⇒ signedness unknown, never guess
img.pixelSpacing; // patient-plane mm - distinct from imagerPixelSpacing

Properties​

bitsAllocated?​

readonly optional bitsAllocated?: number

bitsStored?​

readonly optional bitsStored?: number

columns?​

readonly optional columns?: number

frameOfReferenceUid?​

readonly optional frameOfReferenceUid?: string

highBit?​

readonly optional highBit?: number

imageOrientationPatient?​

readonly optional imageOrientationPatient?: readonly (number | null)[]

imagePositionPatient?​

readonly optional imagePositionPatient?: readonly (number | null)[]

imagerPixelSpacing?​

readonly optional imagerPixelSpacing?: readonly (number | null)[]

isEnhancedMultiFrame​

readonly isEnhancedMultiFrame: boolean

true when this object carries Per-Frame/Shared Functional Groups.

modalityLutSequence?​

readonly optional modalityLutSequence?: readonly Item[]

nominalScannedPixelSpacing?​

readonly optional nominalScannedPixelSpacing?: readonly (number | null)[]

numberOfFrames?​

readonly optional numberOfFrames?: number

photometricInterpretation?​

readonly optional photometricInterpretation?: string

pixelRepresentation?​

readonly optional pixelRepresentation?: number

Raw (0028,0103) value: 0 = unsigned, 1 = signed. Absent ⇒ unknown.

pixelSpacing?​

readonly optional pixelSpacing?: readonly (number | null)[]

planarConfiguration?​

readonly optional planarConfiguration?: number

realWorldValueMaps?​

readonly optional realWorldValueMaps?: readonly RealWorldValueMap[]

rescaleIntercept?​

readonly optional rescaleIntercept?: number

rescaleSlope?​

readonly optional rescaleSlope?: number

rescaleType?​

readonly optional rescaleType?: string

rows?​

readonly optional rows?: number

samplesPerPixel?​

readonly optional samplesPerPixel?: number

signed?​

readonly optional signed?: boolean

true/false only when (0028,0103) was 1/0; absent ⇒ never guessed.

sliceThickness?​

readonly optional sliceThickness?: number

sopInstanceUid?​

readonly optional sopInstanceUid?: string

spacingBetweenSlices?​

readonly optional spacingBetweenSlices?: number

units?​

readonly optional units?: string

voiLutSequence?​

readonly optional voiLutSequence?: readonly Item[]

windowCenter?​

readonly optional windowCenter?: readonly (number | null)[]

windowWidth?​

readonly optional windowWidth?: readonly (number | null)[]

Methods​

frame()​

frame(index): FrameFunctionalGroups

Resolve the functional-group macros for frame index Per-Frame-else-Shared. Throws DicomValueError FRAME_INDEX_OUT_OF_RANGE for an index outside [0, numberOfFrames) and MISSING_REQUIRED_FUNCTIONAL_GROUP when an enhanced object lacks a required geometry macro in both groups.

Parameters​

index​

number

Returns​

FrameFunctionalGroups