DICOM_TAGS_TO_KEEP = ['ReferencedSeriesSequence0_SeriesInstanceUID','AccessionNumber', 'AcquisitionDate',
                      'AcquisitionDateTime', 'AcquisitionNumber', 'AcquisitionTime',
                      'AttenuationCorrectionMethod', 'BodyPartExamined',
                      'ContentDate', 'ContentTime', 'ContrastBolusAgent',
                      'ContrastBolusIngredientConcentration',
                      'ContrastBolusRoute', 'ContrastBolusStartTime', 'ContrastBolusStopTime', 'ContrastBolusTotalDose',
                      'ContrastBolusVolume', 'ContrastFlowDuration', 'ContrastFlowRate', 'ConversionType',
                      'ConvolutionKernel', 'Columns',
                      'CorrectedImage', 'CountsSource',
                      'DeadTimeFactor', 'DecayCorrection', 'DecayFactor',
                      'DoseCalibrationFactor', 'EnergyWeightingFactor',
                      'EnergyWindowRangeSequence0_EnergyWindowLowerLimit',
                      'EnergyWindowRangeSequence0_EnergyWindowUpperLimit',
                      'FrameOfReferenceUID',
                      'FrameReferenceTime', 'FrameTime',
                      'ImageOrientationPatient',
                      'ImagePositionPatient', 'ImageType', 'InstanceCreationDate', 'InstanceCreationTime',
                      'InstanceCreatorUID',
                      'InstanceNumber',
                      'LargestImagePixelValue',
                      'Laterality', 'Manufacturer',
                      'ManufacturerModelName', 'ModalitiesInStudy', 'Modality',
                      'NumberOfSlices',
                      'NumberOfStudyRelatedInstances',
                      'PatientAge',
                      'PatientBirthDate',
                      'PatientID', 'PatientName', 'PatientOrientation',
                      'PatientPosition', 'PatientSex',
                      'PatientSize',
                      'PatientWeight', 'PhotometricInterpretation',
                      'PixelAspectRatio',
                      'PixelPaddingValue', 'PixelRepresentation', 'PixelSpacing', 'PlanarConfiguration',
                      'PositionReferenceIndicator',
                      'RadiopharmaceuticalInformationSequence0_RadionuclideHalfLife',
                      'RadiopharmaceuticalInformationSequence0_RadionuclidePositronFraction',
                      'RadiopharmaceuticalInformationSequence0_RadionuclideTotalDose',
                      'RadiopharmaceuticalInformationSequence0_Radiopharmaceutical',
                      'RadiopharmaceuticalInformationSequence0_RadiopharmaceuticalStartDateTime',
                      'RadiopharmaceuticalInformationSequence0_RadiopharmaceuticalStartTime',
                      'RadiopharmaceuticalInformationSequence0_RadiopharmaceuticalStopDateTime',
                      'RadiopharmaceuticalInformationSequence0_RadiopharmaceuticalStopTime',
                      'RadiopharmaceuticalInformationSequence0_RadiopharmaceuticalVolume', 'RandomsCorrectionMethod',
                      'ReasonForStudy',
                      'ReconstructionDiameter', 'ReconstructionMethod', 'ReconstructionTargetCenterPatient',
                      'ReferencedImageSequence0_ReferencedSOPClassUID',
                      'ReferencedImageSequence0_ReferencedSOPInstanceUID',
                      'ReferencedStudySequence0_ReferencedSOPClassUID',
                      'ReferencedStudySequence0_ReferencedSOPInstanceUID', 'ReferringPhysicianName',
                      'RelatedSeriesSequence0_SeriesInstanceUID',
                      'RelatedSeriesSequence0_StudyInstanceUID', 'ReprojectionMethod',
                      'RescaleIntercept', 'RescaleSlope',
                      'RescaleType',
                      'Rows', 'SOPClassUID', 'SOPInstanceUID',
                      'ScatterCorrectionMethod', 'ScatterFractionFactor',
                      'SeriesDate',
                      'SeriesDescription',
                      'SeriesInstanceUID', 'SeriesNumber', 'SeriesTime', 'SeriesType',
                      'SliceLocation',
                      'SliceSensitivityFactor', 'SmokingStatus',
                      'SpacingBetweenSlices',
                      'StudyDate',
                      'StudyDescription',
                      'StudyID', 'StudyInstanceUID', 'StudyPriorityID', 'StudyStatusID', 'StudyTime', 'file_location']
