docs(faq): FAQ and Segmentation Mode Fix for some studies (#3762)

extensions/default/package.json

@@ -32,7 +32,7 @@
   "peerDependencies": {
     "@ohif/core": "3.8.0-beta.9",
     "@ohif/i18n": "3.8.0-beta.9",
-    "dcmjs": "^0.29.11",
+    "dcmjs": "^0.29.12",
     "dicomweb-client": "^0.10.2",
     "prop-types": "^15.6.2",
     "react": "^17.0.2",

extensions/default/src/init.ts

@@ -51,10 +51,16 @@ export default function init({ servicesManager, configuration = {} }): void {
 const handlePETImageMetadata = ({ SeriesInstanceUID, StudyInstanceUID }) => {
   const { instances } = DicomMetadataStore.getSeries(StudyInstanceUID, SeriesInstanceUID);
 
-  const modality = instances[0].Modality;
-  if (modality !== 'PT') {
+  if (!instances?.length) {
     return;
   }
+
+  const modality = instances[0].Modality;
+
+  if (!modality || modality !== 'PT') {
+    return;
+  }
+
   const imageIds = instances.map(instance => instance.imageId);
   const instanceMetadataArray = [];
   imageIds.forEach(imageId => {