feat: Add OP normalizer (#403)

Author: igorsimko

src/DicomMetaDictionary.js

@@ -382,7 +382,8 @@ DicomMetaDictionary.sopClassNamesByUID = {
     "1.2.840.10008.5.1.4.1.1.88.33": "ComprehensiveSR",
     "1.2.840.10008.5.1.4.1.1.128": "PETImage",
     "1.2.840.10008.5.1.4.1.1.130": "EnhancedPETImage",
-    "1.2.840.10008.5.1.4.1.1.128.1": "LegacyConvertedEnhancedPETImage"
+    "1.2.840.10008.5.1.4.1.1.128.1": "LegacyConvertedEnhancedPETImage",
+    "1.2.840.10008.5.1.4.1.1.77.1.5.1": "OphthalmicPhotography8BitImage"
 };
 
 DicomMetaDictionary.dictionary = dictionary;

src/normalizers.js

@@ -51,6 +51,8 @@ class Normalizer {
             PETImageNormalizer;
         sopClassUIDMap[toUID.Segmentation] = SEGImageNormalizer;
         sopClassUIDMap[toUID.DeformableSpatialRegistration] = DSRNormalizer;
+        sopClassUIDMap[toUID.OphthalmicPhotography8BitImage] =
+            OPImageNormalizer;
         return sopClassUIDMap[sopClassUID];
     }
 
@@ -531,6 +533,12 @@ class DSRNormalizer extends Normalizer {
     }
 }
 
+class OPImageNormalizer extends Normalizer {
+    normalize() {
+        this.dataset = this.datasets[0]; // only one dataset per series and for now we assume it is normalized
+    }
+}
+
 export { Normalizer };
 export { ImageNormalizer };
 export { MRImageNormalizer };
@@ -543,3 +551,4 @@ export { PETImageNormalizer };
 export { SEGImageNormalizer };
 export { PMImageNormalizer };
 export { DSRNormalizer };
+export { OPImageNormalizer };

test/normalizers.test.js

@@ -1 +1,21 @@
-it("No tests yet", () => {});
+import "regenerator-runtime/runtime.js";
+
+import fs from "fs";
+import { jest } from "@jest/globals";
+import { DicomMessage } from "../src/DicomMessage";
+import { DicomMetaDictionary } from "../src/DicomMetaDictionary";
+import dcmjs from "../src";
+
+// The asset downloads in this file might take some time on a slower connection
+jest.setTimeout(60000);
+
+it("test_normalizer_op", async () => {
+    const file = fs.readFileSync('test/sample-op.dcm');
+    const dicomDict = DicomMessage.readFile(file.buffer);
+
+    const dataset = DicomMetaDictionary.naturalizeDataset(dicomDict.dict);
+    const multiframe = dcmjs.normalizers.Normalizer.normalizeToDataset([dataset]);
+
+    expect(dataset.NumberOfFrames).toEqual(1);
+    expect(multiframe.NumberOfFrames).toEqual(1);
+});