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CIBC:Documentation:SCIRun:Reference:Teem:ImportNrrdFromDicom

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ImportNrrdFromDicom

Information

Package: Teem
Catagory: DataIO
Author(s): Jenny Simpson
Status: Supported in latest version
Version: 3.0

Description

Summary

Convert DICOM data to the NRRD format which can be used in SCIRun networks.

Detailed Description

This module provides support for converting <ulink text="http://www.psychology.nottingham.ac.uk/staff/cr1/dicom.html">DICOM</ulink> data to the <ulink text="http://teem.sourceforge.net/nrrd/index.html">NRRD</ulink> format which can be used in SCIRun networks. An important point is that this module is dependent on the Insight package, so both the Teem and Insight packages have to be enabled in the SCIRun build in order for the ImportNrrdFromDicom converter to work.

Some brief background information about the DICOM format will be helpful in understanding how to load data using the ImportNrrdFromDicom reader. For a detailed description of the DICOM format, please refer to the documentation pages for <ulink text="http://www.psychology.nottingham.ac.uk/staff/cr1/dicom.html">DICOM</ulink>.Also, note that the DICOM format is "flexible", meaning that implementations tend to vary slightly, so the descriptions that follow are not guaranteed to be universally applicable.

DICOM is a standard file format that stores volume data from computed tomography (CT) scans, magnetic resonance imaging (MRI), and ultrasound. Each DICOM file has a header that is followed by image data. While a single DICOM file can contain image data for multiple slices of scanned data, usually each DICOM file contains only one image frame corresponding to one slice. For example, for a scan consisting of 60 slices, there would most likely be 60 DICOM files. This logical grouping of DICOM files is called a series. As a result, when loading DICOM data using the ImportNrrdFromDicom module, one or more series' each containing one or more files can be loaded.

The ImportNrrdFromDicom module requires the user to specify a directory containing the data files. One or more series' of DICOM files can be selected for processing. If the files are recognized as valid DICOM format, they are read in and converted to the NRRD format which can then be passed downstream to certain other SCIRun modules.



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