A mixed type are DICOM "coordinates". They are mostly world coordinates but refer to the patient axes.
Based on the patient's main body axes (axial/transverse, coronal, sagittal)
Measured as 1 coordinate unit = 1 millimeter
Right-handed
Not standardized regarding their origin
The DICOM (Digital Imaging and Communications in Medicine) standard is a data format that groups information into data sets. This way, the image data is always kept together with all meta information like patient ID, study time, series time, acquisition data etc. The image slice itself is essentially just another tag with pixel information.
DICOM tags have unique numbers, encoded as 2x4 numbers in hexadecimal notation (0000,0000). The first four numbers are the data group, the second four numbers the data set/tag.
Note | |
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Although DICOM is a standard, often the data that is received / recorded does not follow the standard. Wrongly used tags or missing mandatory tags may cause problems in data processing. |
Some typical modules for DICOM handling:
With DicomImport
you import DICOM files and convert them into a 4D-TIFF image and a DICOM header file for the use in MeVisLab.
In addition, DicomImport
offers features for sorting; click the help button for an overview of possible options.
You can view the image-wide DICOM tags with the module DicomTagBrowser
.
You can view and cut out frame-specific tags with the module DicomFrameSelect
.
You can modify DICOM tags with the module DicomTagModify
.
You can also create a new DICOM header for an image file with the ImageSave
module, tab Options, Save DICOM header file only.
Tip | |
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For handling and manipulating DICOM data, the DICOM toolkit “DCMTK” (DICOM@offis) is recommended. Parts of this toolkit are also used in MeVisLab. |
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