support MRI custom overlay data for OHIF through fetchMeta because it couldn't retrieved from C-FIND / FINDSCU

src/dimse/parseMeta.ts

@@ -58,6 +58,32 @@ function parseFile(filename: string): Promise<ElementType> {
         const sliceThickness = dataset.string('x00180050');
         const sliceLocation = dataset.string('x00201041');
 
+        // MR-specific tags for overlay
+        // TODO: buat ini dynamic berdasarkan includefields atau modality
+        const spacingBetweenSlices = dataset.string('x00180088');
+        const percentPhaseFieldOfView = dataset.string('x00180094');
+        const acquisitionMatrixElement = dataset.elements.x00181310;
+        const acquisitionMatrix = acquisitionMatrixElement
+          ? [
+            dataset.uint16('x00181310', 0),
+            dataset.uint16('x00181310', 1),
+            dataset.uint16('x00181310', 2),
+            dataset.uint16('x00181310', 3),
+          ]
+          : null;
+        const scanningSequence = dataset.string('x00180020');
+        const repetitionTime = dataset.string('x00180080');
+        const echoTime = dataset.string('x00180081');
+        const inversionTime = dataset.string('x00180082');
+        const receiveCoilName = dataset.string('x00181250');
+        const mrAcquisitionType = dataset.string('x00180023');
+        const phaseEncodingDirection = dataset.string('x00181312');
+        const echoTrainLength = dataset.string('x00180091');
+        const flipAngle = dataset.string('x00181314');
+        const pixelBandwidth = dataset.string('x00180095');
+        const acquisitionTime = dataset.string('x00080032');
+        const parallelAcquisitionTechnique = dataset.string('x00181316');
+
         // append to all results
         const result: ElementType = {
           '00100010': { Value: [{ Alphabetic: patientName }], vr: 'PN' },
@@ -88,7 +114,23 @@ function parseFile(filename: string): Promise<ElementType> {
           '00200013': { Value: [instanceNumber], vr: 'IS' },
           '00180050': { Value: [sliceThickness], vr: 'DS' },
           '00201041': { Value: [sliceLocation], vr: 'DS' },
+          '00180088': { Value: [spacingBetweenSlices], vr: 'DS' },
+          '00180094': { Value: [percentPhaseFieldOfView], vr: 'DS' },
+          ...(acquisitionMatrix && { '00181310': { Value: acquisitionMatrix, vr: 'US' } }),
+          '00180020': { Value: [scanningSequence], vr: 'CS' },
+          '00180080': { Value: [repetitionTime], vr: 'DS' },
+          '00180081': { Value: [echoTime], vr: 'DS' },
+          '00180082': { Value: [inversionTime], vr: 'DS' },
+          '00181250': { Value: [receiveCoilName], vr: 'SH' },
+          '00180023': { Value: [mrAcquisitionType], vr: 'CS' },
+          '00181312': { Value: [phaseEncodingDirection], vr: 'CS' },
+          '00180091': { Value: [echoTrainLength], vr: 'IS' },
+          '00181314': { Value: [flipAngle], vr: 'DS' },
+          '00180095': { Value: [pixelBandwidth], vr: 'DS' },
+          '00080032': { Value: [acquisitionTime], vr: 'TM' },
+          '00181316': { Value: [parallelAcquisitionTechnique], vr: 'CS' },
         };
+
         resolve(result);
       });
     });
@@ -105,7 +147,7 @@ export function parseMeta(json: object, studyInstanceUID: string, seriesInstance
     const sopInstanceUid = json[key]['00080018'].Value[0];
     const pathname = path.join(storagePath, studyInstanceUID, sopInstanceUid);
     parsing.push(parseFile(pathname));
-    
+
   }
   return Promise.all(parsing);
 }

src/routes/routes.ts

@@ -51,15 +51,16 @@ module.exports = function (server: FastifyInstance, opts: unknown, done: () => v
       const hasStudyDate = query.StudyDate !== undefined;
 
       if (!hasMedicalRecord && !hasAccessionNumber && !hasPatientName && !hasStudyInstanceUID && !hasStudyDate) {
+        // TODO: buat startDate tgl H-1 karena terkadang kena Bug beda timezone +-7 di file DICOM nya
         const startDate = moment().format('YYYYMMDD');
         const endDate = moment().format('YYYYMMDD');
         query.StudyDate = `${startDate}-${endDate}`;
-        
+
         // Add time range filter (entire day)
         const startTime = '000000';
         const endTime = '235959';
         query['00080030'] = `${startTime}-${endTime}`; // StudyTime (0008,0030)
-        
+
         logger.info(`Adding default date range filter: ${query.StudyDate}`);
         logger.info(`Adding default time range filter: ${query['00080030']}`);
       }
@@ -67,14 +68,14 @@ module.exports = function (server: FastifyInstance, opts: unknown, done: () => v
       logger.info(`Querying studies with filters: ${JSON.stringify(query)}`);
 
       const json = deepmerge.all(await doFind(QUERY_LEVEL.STUDY, query), options);
-      
+
       // Karena by default hasilnya urut StudyTime (ascending), 
       // Maka, jika butuh latest first (descending), maka dibalik urutannya
       if (Array.isArray(json) && json.length > 0) {
         logger.info(`Reversing order of ${json.length} studies to show latest first`);
         json.reverse();
       }
-      
+
       return reply.send(json);
     } catch (error) {
       logger.error(error);
@@ -410,6 +411,25 @@ module.exports = function (server: FastifyInstance, opts: unknown, done: () => v
     }
   });
 
+  server.get<{
+    Params: IParamsImage;
+    Querystring: QueryParams;
+  }>('/rs/studies/:studyInstanceUid/series/:seriesInstanceUid/instances/:sopInstanceUid/metadata', async (req, reply) => {
+    const { studyInstanceUid, seriesInstanceUid, sopInstanceUid } = req.params;
+    const { query } = req;
+    query.StudyInstanceUID = studyInstanceUid;
+    query.SeriesInstanceUID = seriesInstanceUid;
+    query.SOPInstanceUID = sopInstanceUid;
+
+    try {
+      const rsp = await fetchMeta(query, studyInstanceUid, seriesInstanceUid);
+      return reply.send(rsp);
+    } catch (error) {
+      logger.error(error);
+      return reply.send(500);
+    }
+  });
+
   done();
 };