The DicomIO connectors allows Beam pipelines to make calls to the Dicom API of the Google Cloud
 Healthcare API (https://cloud.google.com/healthcare/docs/how-tos#dicom-guide).
 
Reading Study-Level Metadata
 The study-level metadata for a dicom instance can be read with 
DicomIO.ReadStudyMetadata.
 Retrieve the metadata of a dicom instance given its store path as a string. This will return a
 
DicomIO.ReadStudyMetadata.Result. You can fetch the successful calls using getReadResponse(), and
 any failed reads using getFailedReads().
 
Example
 Pipeline p = ... String webPath = ... DicomIO.ReadStudyMetadata.Result readMetadataResult
 = p .apply(Create.of(webPath)) PCollection<String> goodRead =
 readMetadataResult.getReadResponse() PCollection<String> failRead =
 readMetadataResult.getFailedReads()