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Interfile Files

Interfile is a file format that was developed for the exchange of nuclear medicine image data. For more information, see interfileinfo or interfileread.

An Interfile data set consists of two files:

  • Header file — Provides information about dimensions, identification and processing history. You use the interfileinfo function to read the header information. The header file has the .hdr file extension.

  • Image file — Image data, whose data type and ordering are described by the header file. You use interfileread to read the image data into the workspace. The image file has the .img file extension.


The Interfile format uses the same dual-file data set organization and the same file name extensions as the Analyze 7.5 format; however, the file formats are not interchangeable. To learn how to read data from an Analyze 7.5 data set, see Mayo Analyze 7.5 Files.

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