When it is computable by examining the files, the DICOM module will select the most likely interpretation option by default. This means that often Slicer will be able to suggest multiple ways of interpreting the data (such as reading DICOM files as a diffusion dataset or as a scalar volume. If, for example, the speed of the table motion is not consistent during an acquisition (which can be the case for some contrast ‘bolus chasing’ scans, Slicer’s DICOM module will warn the user that the acquisition geometry is not consistent and the user should use caution when interpreting analysis results such as measurements. That is, DICOM files typically describe attributes of the image capture, like the sequence of locations of the table during CT acquisition, while Slicer operates on image volumes of regularly spaced pixels. DICOM plugins ¶Ī main function of the DICOM module is to map from acquisition data organization into volume representation. However once the data is imported to the database, it will be organized according the the DICOM standard Patient/Study/Series hierarchy. Note that the DICOM standard does not specify how files will be organized on disk, so if you have DICOM data from a CDROM or otherwise transferred from a scanner, you cannot in general tell anything about the contents from the file or directory names. Slicer modules may also populate the DICOM database with computation results. DICOM data can enter the database either through file import or via a DICOM network transfer. Do not manually modify the contents of these directories. Each database is simply a directory on your local disk that has a few SQLite files and subdirectories to store image data. You can have multiple databases on your computer at a time, and switch between them if, for example, they include data from different research projects. To organize the data and allow faster access, Slicer keeps a local DICOM Database containing copies of (or links to) DICOM files, and basic information about content of each file. Image processing tasks most often are concerned with analyzing the whole image volume, which most often corresponds to a single Series. Those objects most often will have multiple files (instances) for each series. Most common object types are those that store the image volumes produced by the CT and MR scanners. There is a variety of DICOM objects defined by the standard.
#Powerreader cd viewer export images series#
Instance (most often, each Series will contain multiple Instances, with each Instance corresponding to a single slice of the image)Īs a result of imaging exam, imaging equipment generates DICOM files, where each file corresponds to one Instance, and is tagged with the information that allows to determine the Series, Study and Patient information to put it into the proper location in the hierarchy. Series (single image acquisition, most often corresponding to a single image volume) … can have 1 or more Study (single imaging exam encounter) … can have 1 or more In most cases, imaging equipment (CT and MR scanners) used in the hospitals will generate images saved as DICOM objects.ĭICOM organizes data following the hierarchy of Slicer provides support for the most commonly used subset of DICOM functionality, with the particular features driven by the needs of clinical research: reading and writing data sets from/to disk in DICOM format and network transfer - querying, retrieving, and sending and receiving data sets - using DIMSE and DICOMweb networking protocols.ĭigital Imaging and Communications in Medicine (DICOM) is a widely used standard for information exchange digital radiology. This module allows importing and exporting and network transfer of DICOM data.
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