Read NRRD image
Read Image Data from NRRD File
Read the image data from an NRRD format file. The file is part of a data set containing the 3-D CT and MRI scans from The Retrospective Image Registration Evaluation (RIRE) Dataset, converted to the NRRD file format. The original data set was provided by Dr. Michael Fitzpatrick. For more information, see the RIRE Project homepage. The size of the entire data set is approximately 35 MB. Download the data set from the MathWorks® website, then unzip the folder.
zipFile = matlab.internal.examples.downloadSupportFile("medical","MedicalRegistrationNRRDdata.zip"); filepath = fileparts(zipFile); unzip(zipFile,filepath)
Specify the name of the NRRD file to read.
filename = fullfile(filepath,"supportfilesNRRD","Patient007CT.nrrd");
Read the image data from
filename. The image data,
V, is a 3-D array of intensity values.
V = nrrdread(filename); whos V
Name Size Bytes Class Attributes V 512x512x28 29360128 single
Display the image data stored in the array
filename — Name of NRRD file
string scalar | character vector
Name of the NRRD file, specified as a string scalar or a character vector. The file
must be a valid NRRD file (
.nrrd) that contains header information
and image data. Specify
filename as the absolute path to the file,
a relative path from the current directory, or a relative path from a directory on the
V — Volumetric image data
Volumetric image data, returned as a numeric array.
Introduced in R2022b