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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 | 34x 34x 34x 5x 5x 5x 5x 34x 10x 34x 5x 34x 34x 34x 34x 5x 5x 5x 34x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 5x 15x 5x 34x | import { imageLoader } from '@cornerstonejs/core';
import dicomImageLoader from '@cornerstonejs/dicom-image-loader';
import { api } from 'dicomweb-client';
import { DICOMWeb, errorHandler } from '@ohif/core';
const getImageId = imageObj => {
Iif (!imageObj) {
return;
}
return typeof imageObj.getImageId === 'function' ? imageObj.getImageId() : imageObj.url;
};
const findImageIdOnStudies = (studies, displaySetInstanceUID) => {
const study = studies.find(study => {
const displaySet = study.displaySets.some(
displaySet => displaySet.displaySetInstanceUID === displaySetInstanceUID
);
return displaySet;
});
const { series = [] } = study;
const { instances = [] } = series[0] || {};
const instance = instances[0];
return getImageId(instance);
};
const someInvalidStrings = strings => {
const stringsArray = Array.isArray(strings) ? strings : [strings];
const emptyString = string => !string;
let invalid = stringsArray.some(emptyString);
return invalid;
};
const getImageInstance = dataset => {
return dataset && dataset.images && dataset.images[0];
};
const getNonImageInstance = dataset => {
return dataset && dataset.instance;
};
const getImageInstanceId = imageInstance => {
return getImageId(imageInstance);
};
const fetchIt = (url, headers = DICOMWeb.getAuthorizationHeader()) => {
return fetch(url, headers).then(response => response.arrayBuffer());
};
const cornerstoneRetriever = imageId => {
return imageLoader.loadAndCacheImage(imageId).then(image => {
return image && image.data && image.data.byteArray.buffer;
});
};
const wadorsRetriever = (
url,
studyInstanceUID,
seriesInstanceUID,
sopInstanceUID,
headers = DICOMWeb.getAuthorizationHeader(),
errorInterceptor = errorHandler.getHTTPErrorHandler()
) => {
const config = {
url,
headers,
errorInterceptor,
};
const dicomWeb = new api.DICOMwebClient(config);
return dicomWeb.retrieveInstance({
studyInstanceUID,
seriesInstanceUID,
sopInstanceUID,
});
};
const getImageLoaderType = imageId => {
const loaderRegExp = /^\w+\:/;
const loaderType = loaderRegExp.exec(imageId);
return (
(loaderRegExp.lastIndex === 0 &&
loaderType &&
loaderType[0] &&
loaderType[0].replace(':', '')) ||
''
);
};
class DicomLoaderService {
getLocalData(dataset, studies) {
// Use referenced imageInstance
const imageInstance = getImageInstance(dataset);
const nonImageInstance = getNonImageInstance(dataset);
if (
(!imageInstance && !nonImageInstance) ||
!nonImageInstance.imageId?.startsWith('dicomfile')
) {
return;
}
const instance = imageInstance || nonImageInstance;
let imageId = getImageInstanceId(instance);
// or Try to get it from studies
Iif (someInvalidStrings(imageId)) {
imageId = findImageIdOnStudies(studies, dataset.displaySetInstanceUID);
}
Iif (!someInvalidStrings(imageId)) {
return dicomImageLoader.wadouri.loadFileRequest(imageId);
}
}
getDataByImageType(dataset) {
const imageInstance = getImageInstance(dataset);
Iif (imageInstance) {
const imageId = getImageInstanceId(imageInstance);
let getDicomDataMethod = fetchIt;
const loaderType = getImageLoaderType(imageId);
switch (loaderType) {
case 'dicomfile':
getDicomDataMethod = cornerstoneRetriever.bind(this, imageId);
break;
case 'wadors':
const url = imageInstance.getData().wadoRoot;
const studyInstanceUID = imageInstance.getStudyInstanceUID();
const seriesInstanceUID = imageInstance.getSeriesInstanceUID();
const sopInstanceUID = imageInstance.getSOPInstanceUID();
const invalidParams = someInvalidStrings([
url,
studyInstanceUID,
seriesInstanceUID,
sopInstanceUID,
]);
Iif (invalidParams) {
return;
}
getDicomDataMethod = wadorsRetriever.bind(
this,
url,
studyInstanceUID,
seriesInstanceUID,
sopInstanceUID
);
break;
case 'wadouri':
// Strip out the image loader specifier
imageId = imageId.substring(imageId.indexOf(':') + 1);
Iif (someInvalidStrings(imageId)) {
return;
}
getDicomDataMethod = fetchIt.bind(this, imageId);
break;
default:
return;
}
return getDicomDataMethod();
}
}
getDataByDatasetType(dataset) {
const {
StudyInstanceUID,
SeriesInstanceUID,
SOPInstanceUID,
authorizationHeaders,
wadoRoot,
wadoUri,
instance,
} = dataset;
// Retrieve wadors or just try to fetch wadouri
if (!someInvalidStrings(wadoRoot)) {
return wadorsRetriever(
wadoRoot,
StudyInstanceUID,
SeriesInstanceUID,
SOPInstanceUID,
authorizationHeaders
);
} else Eif (!someInvalidStrings(wadoUri)) {
return fetchIt(wadoUri, { headers: authorizationHeaders });
} else Iif (!someInvalidStrings(instance?.url)) {
// make sure the url is absolute, remove the scope
// from it if it is not absolute. For instance it might be dicomweb:http://....
// and we need to remove the dicomweb: part
const url = instance.url;
const absoluteUrl = url.startsWith('http') ? url : url.substring(url.indexOf(':') + 1);
return fetchIt(absoluteUrl, { headers: authorizationHeaders });
}
}
*getLoaderIterator(dataset, studies, headers) {
yield this.getLocalData(dataset, studies);
yield this.getDataByImageType(dataset);
yield this.getDataByDatasetType(dataset);
}
findDicomDataPromise(dataset, studies, headers) {
dataset.authorizationHeaders = headers;
const loaderIterator = this.getLoaderIterator(dataset, studies);
// it returns first valid retriever method.
for (const loader of loaderIterator) {
if (loader) {
return loader;
}
}
// in case of no valid loader
throw new Error('Invalid dicom data loader');
}
}
const dicomLoaderService = new DicomLoaderService();
export default dicomLoaderService;
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