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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,157 @@ | ||
| import {getSpacingFromMeasure} from './dicomElementsWrapper'; | ||
| import {logger} from '../utils/logger'; | ||
|
|
||
| // doc imports | ||
| /* eslint-disable no-unused-vars */ | ||
| import {DataElement} from './dataElement'; | ||
| import {Spacing} from '../image/spacing'; | ||
| /* eslint-enable no-unused-vars */ | ||
|
|
||
| /** | ||
| * @typedef {Object<string, DataElement>} DataElements | ||
| */ | ||
|
|
||
| /** | ||
| * DICOM segment frame info. | ||
| */ | ||
| export class DicomSegmentFrameInfo { | ||
| /** | ||
| * The dimension index. | ||
| * | ||
| * @type {number[]} | ||
| */ | ||
| dimIndex; | ||
| /** | ||
| * The frame image position patient. | ||
| * | ||
| * @type {number[]} | ||
| */ | ||
| imagePosPat; | ||
| /** | ||
| * List of derivation images. | ||
| * | ||
| * @type {Array} | ||
| */ | ||
| derivationImages; | ||
| /** | ||
| * The reference segment number. | ||
| * | ||
| * @type {number} | ||
| */ | ||
| refSegmentNumber; | ||
|
|
||
| /** | ||
| * The frame image orientation. | ||
| * | ||
| * @type {number[]|undefined} | ||
| */ | ||
| imageOrientationPatient; | ||
| /** | ||
| * The frame spacing. | ||
| * | ||
| * @type {Spacing|undefined} | ||
| */ | ||
| spacing; | ||
|
|
||
| /** | ||
| * @param {number[]} dimIndex The dimension index. | ||
| * @param {number[]} imagePosPat The frame image position patient. | ||
| * @param {Array} derivationImages List of derivation images. | ||
| * @param {number} refSegmentNumber The reference segment number. | ||
| */ | ||
| constructor(dimIndex, imagePosPat, derivationImages, refSegmentNumber) { | ||
| this.dimIndex = dimIndex; | ||
| this.imagePosPat = imagePosPat; | ||
| this.derivationImages = derivationImages; | ||
| this.refSegmentNumber = refSegmentNumber; | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * Get a frame information object from a dicom element. | ||
| * | ||
| * @param {DataElements} dataElements The dicom element. | ||
| * @returns {DicomSegmentFrameInfo} A frame information object. | ||
| */ | ||
| export function getSegmentFrameInfo(dataElements) { | ||
| // Derivation Image Sequence | ||
| const derivationImages = []; | ||
| if (typeof dataElements['00089124'] !== 'undefined') { | ||
| const derivationImageSq = dataElements['00089124'].value; | ||
| // Source Image Sequence | ||
| for (let i = 0; i < derivationImageSq.length; ++i) { | ||
| const sourceImages = []; | ||
| if (typeof derivationImageSq[i]['00082112'] !== 'undefined') { | ||
| const sourceImageSq = derivationImageSq[i]['00082112'].value; | ||
| for (let j = 0; j < sourceImageSq.length; ++j) { | ||
| const sourceImage = {}; | ||
| // Referenced SOP Class UID | ||
| if (typeof sourceImageSq[j]['00081150'] !== 'undefined') { | ||
| sourceImage.referencedSOPClassUID = | ||
| sourceImageSq[j]['00081150'].value[0]; | ||
| } | ||
| // Referenced SOP Instance UID | ||
| if (typeof sourceImageSq[j]['00081155'] !== 'undefined') { | ||
| sourceImage.referencedSOPInstanceUID = | ||
| sourceImageSq[j]['00081155'].value[0]; | ||
| } | ||
| sourceImages.push(sourceImage); | ||
| } | ||
| } | ||
| derivationImages.push({ | ||
| sourceImages: sourceImages | ||
| }); | ||
| } | ||
| } | ||
| // Frame Content Sequence (required, only one) | ||
| const frameContentSq = dataElements['00209111'].value; | ||
| // Dimension Index Value | ||
| const dimIndex = frameContentSq[0]['00209157'].value; | ||
| // Segment Identification Sequence (required, only one) | ||
| const segmentIdSq = dataElements['0062000A'].value; | ||
| // Referenced Segment Number | ||
| const refSegmentNumber = segmentIdSq[0]['0062000B'].value[0]; | ||
| // Plane Position Sequence (required, only one) | ||
| const planePosSq = dataElements['00209113'].value; | ||
| // Image Position (Patient) (conditionally required) | ||
| const imagePosPat = planePosSq[0]['00200032'].value; | ||
| for (let p = 0; p < imagePosPat.length; ++p) { | ||
| imagePosPat[p] = parseFloat(imagePosPat[p]); | ||
| } | ||
| const frameInfo = new DicomSegmentFrameInfo( | ||
| dimIndex, | ||
| imagePosPat, | ||
| derivationImages, | ||
| refSegmentNumber | ||
| ); | ||
| // Plane Orientation Sequence | ||
| if (typeof dataElements['00209116'] !== 'undefined') { | ||
| const framePlaneOrientationSeq = dataElements['00209116']; | ||
| if (framePlaneOrientationSeq.value.length !== 0) { | ||
| // should only be one Image Orientation (Patient) | ||
| const frameImageOrientation = | ||
| framePlaneOrientationSeq.value[0]['00200037'].value; | ||
| if (typeof frameImageOrientation !== 'undefined') { | ||
| frameInfo.imageOrientationPatient = frameImageOrientation; | ||
| } | ||
| } | ||
| } | ||
| // Pixel Measures Sequence | ||
| if (typeof dataElements['00289110'] !== 'undefined') { | ||
| const framePixelMeasuresSeq = dataElements['00289110']; | ||
| if (framePixelMeasuresSeq.value.length !== 0) { | ||
| // should only be one | ||
| const frameSpacing = | ||
| getSpacingFromMeasure(framePixelMeasuresSeq.value[0]); | ||
| if (typeof frameSpacing !== 'undefined') { | ||
| frameInfo.spacing = frameSpacing; | ||
| } | ||
| } else { | ||
| logger.warn( | ||
| 'No shared functional group pixel measure sequence items.'); | ||
| } | ||
| } | ||
|
|
||
| return frameInfo; | ||
| } | ||
|
|
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