To view the values in a specific tag, which are not visible when using the "dicomdisp" function, we can make use of the "dicominfo" function. Please look into the code below which illustrates the same.
dicomdisp("CT-MONO2-16-ankle.dcm")
File: /MATLAB/toolbox/images/imdata/CT-MONO2-16-ankle.dcm (525436 bytes)
Read on an IEEE little-endian machine.
File begins with group 0002 metadata at byte 132.
Transfer syntax: 1.2.840.10008.1.2 (Implicit VR Little Endian).
DICOM Information object: 1.2.840.10008.5.1.4.1.1.7 (Secondary Capture Image Storage).
Location Level Tag VR Size Name Data
----------------------------------------------------------------------------------------------------
0000132 0 (0002,0000) UL 4 bytes - FileMetaInformationGroupLength *Binary*
0000144 0 (0002,0001) OB 2 bytes - FileMetaInformationVersion *Binary*
0000158 0 (0002,0002) UI 26 bytes - MediaStorageSOPClassUID [1.2.840.10008.5.1.4.1.1.7 ]
0000192 0 (0002,0003) UI 50 bytes - MediaStorageSOPInstanceUID [1.2.840.113619.2.1.2411.1031152382.365.1.736169244]
0000250 0 (0002,0010) UI 18 bytes - TransferSyntaxUID [1.2.840.10008.1.2 ]
0000276 0 (0002,0012) UI 18 bytes - ImplementationClassUID [1.2.840.113619.6.5]
0000302 0 (0002,0013) SH 6 bytes - ImplementationVersionName [1_2_5 ]
0000316 0 (0002,0016) AE 12 bytes - SourceApplicationEntityTitle [CTN_STORAGE ]
0000336 0 (0008,0000) UL 4 bytes - IdentifyingGroupLength *Binary*
0000348 0 (0008,0008) CS 20 bytes - ImageType [DERIVED\SECONDARY\3D]
0000376 0 (0008,0016) UI 26 bytes - SOPClassUID [1.2.840.10008.5.1.4.1.1.7 ]
0000410 0 (0008,0018) UI 50 bytes - SOPInstanceUID [1.2.840.113619.2.1.2411.1031152382.365.1.736169244]
0000468 0 (0008,0020) DA 10 bytes - StudyDate [1993.04.30]
0000486 0 (0008,0021) DA 10 bytes - SeriesDate [1993.04.30]
0000504 0 (0008,0023) DA 10 bytes - ContentDate [1993.04.30]
0000522 0 (0008,0030) TM 8 bytes - StudyTime [11:27:24]
0000538 0 (0008,0031) TM 8 bytes - SeriesTime [11:27:24]
0000554 0 (0008,0033) TM 8 bytes - ContentTime [11:27:24]
0000570 0 (0008,0060) CS 2 bytes - Modality [CT]
0000580 0 (0008,0064) CS 4 bytes - ConversionType [WSD ]
0000592 0 (0008,0070) LO 18 bytes - Manufacturer [GE MEDICAL SYSTEMS]
0000618 0 (0008,0080) LO 18 bytes - InstitutionName [JFK IMAGING CENTER]
0000644 0 (0008,0090) PN 10 bytes - ReferringPhysicianName [Anonymized]
0000662 0 (0008,1010) SH 8 bytes - StationName [CT01OC0 ]
0000678 0 (0008,1030) LO 8 bytes - StudyDescription [RT ANKLE]
0000694 0 (0008,1060) PN 10 bytes - NameOfPhysiciansReadingStudy [Anonymized]
0000712 0 (0008,1070) PN 10 bytes - OperatorsName [Anonymized]
0000730 0 (0008,1090) LO 12 bytes - ManufacturerModelName [GENESIS_ZEUS]
0000750 0 (0010,0000) UL 4 bytes - PatientGroupLength *Binary*
0000762 0 (0010,0010) PN 10 bytes - PatientName [Anonymized]
0000780 0 (0018,0000) UL 4 bytes - AcquisitionGroupLength *Binary*
0000792 0 (0018,1020) LO 2 bytes - SoftwareVersions [03]
0000802 0 (0020,0000) UL 4 bytes - RelationshipGroupLength *Binary*
0000814 0 (0020,000D) UI 48 bytes - StudyInstanceUID [1.2.840.113619.2.1.1.322987881.621.736170080.681]
0000870 0 (0020,000E) UI 48 bytes - SeriesInstanceUID [1.2.840.113619.2.1.2411.1031152382.365.736169244]
0000926 0 (0020,0011) IS 4 bytes - SeriesNumber [365 ]
0000938 0 (0020,0013) IS 2 bytes - InstanceNumber [1 ]
0000948 0 (0028,0000) UL 4 bytes - ImagePresentationGroupLength *Binary*
0000960 0 (0028,0002) US 2 bytes - SamplesPerPixel *Binary*
0000970 0 (0028,0004) CS 12 bytes - PhotometricInterpretation [MONOCHROME2 ]
0000990 0 (0028,0010) US 2 bytes - Rows *Binary*
0001000 0 (0028,0011) US 2 bytes - Columns *Binary*
0001010 0 (0028,0100) US 2 bytes - BitsAllocated *Binary*
0001020 0 (0028,0101) US 2 bytes - BitsStored *Binary*
0001030 0 (0028,0102) US 2 bytes - HighBit *Binary*
0001040 0 (0028,0103) US 2 bytes - PixelRepresentation *Binary*
0001050 0 (0028,0106) US 2 bytes - SmallestImagePixelValue *Binary*
0001060 0 (0028,0120) US 2 bytes - PixelPaddingValue *Binary*
0001070 0 (0028,1050) DS 4 bytes - WindowCenter [1024]
0001082 0 (0028,1051) DS 4 bytes - WindowWidth [4095]
0001094 0 (0028,1052) DS 6 bytes - RescaleIntercept [-1024 ]
0001108 0 (0028,1053) DS 2 bytes - RescaleSlope [1 ]
0001118 0 (0028,1054) LO 2 bytes - RescaleType [US]
0001128 0 (7FE0,0000) UL 4 bytes - PixelDataGroupLength *Binary*
0001140 0 (7FE0,0010) OB 524288 bytes - PixelData []
Here, in the above code output we can see that for the tag (0002,0000) FileMetaInformationGroupLength, under the "Data" sections shows as Binary. Now if we use the "dicominfo" function to get the file information.
info=dicominfo("CT-MONO2-16-ankle.dcm")
info = struct with fields:
Filename: '/MATLAB/toolbox/images/imdata/CT-MONO2-16-ankle.dcm'
FileModDate: '18-Dec-2000 17:06:43'
FileSize: 525436
Format: 'DICOM'
FormatVersion: 3
Width: 512
Height: 512
BitDepth: 16
ColorType: 'grayscale'
FileMetaInformationGroupLength: 192
FileMetaInformationVersion: [2×1 uint8]
MediaStorageSOPClassUID: '1.2.840.10008.5.1.4.1.1.7'
MediaStorageSOPInstanceUID: '1.2.840.113619.2.1.2411.1031152382.365.1.736169244'
TransferSyntaxUID: '1.2.840.10008.1.2'
ImplementationClassUID: '1.2.840.113619.6.5'
ImplementationVersionName: '1_2_5'
SourceApplicationEntityTitle: 'CTN_STORAGE'
IdentifyingGroupLength: 414
ImageType: 'DERIVED\SECONDARY\3D'
SOPClassUID: '1.2.840.10008.5.1.4.1.1.7'
SOPInstanceUID: '1.2.840.113619.2.1.2411.1031152382.365.1.736169244'
StudyDate: '1993.04.30'
SeriesDate: '1993.04.30'
ContentDate: '1993.04.30'
StudyTime: '11:27:24'
SeriesTime: '11:27:24'
ContentTime: '11:27:24'
Modality: 'CT'
ConversionType: 'WSD'
Manufacturer: 'GE MEDICAL SYSTEMS'
InstitutionName: 'JFK IMAGING CENTER'
ReferringPhysicianName: [1×1 struct]
StationName: 'CT01OC0'
StudyDescription: 'RT ANKLE'
NameOfPhysiciansReadingStudy: [1×1 struct]
OperatorsName: [1×1 struct]
ManufacturerModelName: 'GENESIS_ZEUS'
PatientGroupLength: 18
PatientName: [1×1 struct]
AcquisitionGroupLength: 10
SoftwareVersions: '03'
RelationshipGroupLength: 134
StudyInstanceUID: '1.2.840.113619.2.1.1.322987881.621.736170080.681'
SeriesInstanceUID: '1.2.840.113619.2.1.2411.1031152382.365.736169244'
SeriesNumber: 365
InstanceNumber: 1
ImagePresentationGroupLength: 168
SamplesPerPixel: 1
PhotometricInterpretation: 'MONOCHROME2'
Rows: 512
Columns: 512
BitsAllocated: 16
BitsStored: 16
HighBit: 15
PixelRepresentation: 1
SmallestImagePixelValue: 0
PixelPaddingValue: 0
WindowCenter: 1024
WindowWidth: 4095
RescaleIntercept: -1024
RescaleSlope: 1
RescaleType: 'US'
PixelDataGroupLength: 524296
Here we can see that the "info" has several properties and "FileMetaInformationGroupLength" is one of them. So now using this "info" we can access and manipulate the required property as required.
info.FileMetaInformationGroupLength
ans = uint32
192
info.FileMetaInformationGroupLength=191
info = struct with fields:
Filename: '/MATLAB/toolbox/images/imdata/CT-MONO2-16-ankle.dcm'
FileModDate: '18-Dec-2000 17:06:43'
FileSize: 525436
Format: 'DICOM'
FormatVersion: 3
Width: 512
Height: 512
BitDepth: 16
ColorType: 'grayscale'
FileMetaInformationGroupLength: 191
FileMetaInformationVersion: [2×1 uint8]
MediaStorageSOPClassUID: '1.2.840.10008.5.1.4.1.1.7'
MediaStorageSOPInstanceUID: '1.2.840.113619.2.1.2411.1031152382.365.1.736169244'
TransferSyntaxUID: '1.2.840.10008.1.2'
ImplementationClassUID: '1.2.840.113619.6.5'
ImplementationVersionName: '1_2_5'
SourceApplicationEntityTitle: 'CTN_STORAGE'
IdentifyingGroupLength: 414
ImageType: 'DERIVED\SECONDARY\3D'
SOPClassUID: '1.2.840.10008.5.1.4.1.1.7'
SOPInstanceUID: '1.2.840.113619.2.1.2411.1031152382.365.1.736169244'
StudyDate: '1993.04.30'
SeriesDate: '1993.04.30'
ContentDate: '1993.04.30'
StudyTime: '11:27:24'
SeriesTime: '11:27:24'
ContentTime: '11:27:24'
Modality: 'CT'
ConversionType: 'WSD'
Manufacturer: 'GE MEDICAL SYSTEMS'
InstitutionName: 'JFK IMAGING CENTER'
ReferringPhysicianName: [1×1 struct]
StationName: 'CT01OC0'
StudyDescription: 'RT ANKLE'
NameOfPhysiciansReadingStudy: [1×1 struct]
OperatorsName: [1×1 struct]
ManufacturerModelName: 'GENESIS_ZEUS'
PatientGroupLength: 18
PatientName: [1×1 struct]
AcquisitionGroupLength: 10
SoftwareVersions: '03'
RelationshipGroupLength: 134
StudyInstanceUID: '1.2.840.113619.2.1.1.322987881.621.736170080.681'
SeriesInstanceUID: '1.2.840.113619.2.1.2411.1031152382.365.736169244'
SeriesNumber: 365
InstanceNumber: 1
ImagePresentationGroupLength: 168
SamplesPerPixel: 1
PhotometricInterpretation: 'MONOCHROME2'
Rows: 512
Columns: 512
BitsAllocated: 16
BitsStored: 16
HighBit: 15
PixelRepresentation: 1
SmallestImagePixelValue: 0
PixelPaddingValue: 0
WindowCenter: 1024
WindowWidth: 4095
RescaleIntercept: -1024
RescaleSlope: 1
RescaleType: 'US'
PixelDataGroupLength: 524296
For more information on "dicominfo" function, refer to the following documentation link.
