2D MRI liver slices with navigator frames. A test data set for image based 4D MRI reconstruction

Abstract

The data is organized in three layers. The first layer of directories follows the naming convention YYYY-MM-DD_P[1-3], denoting the day of the session. The number after the P denotes which imaging session of the day it was. Inside each folder there are three subfolders named: Nav_+_Data, Nav_Pur_1 und Nav_Pur_2 all of which containing the DICOM images. The first contains the interleaved sequences. Both other folders contain a reference navigator sequence each. The file names contain the following parts: PPPP_XXX_XXXX.MR.GULAMHUSSENE_LEBER.SSSS.NNNN.YYYY.MM.DD PPPP is an anonymize subject ID MR.GULAMHUSSENE_LEBER is the name of the study SSSS is the sequence number NNNN is the image number in the sequence YYYY.MM.DD is the date of acquisition The interleaved sequences are an alternating succession of navigator and data frames. Each data frame was imaged 200ms after the previous and 200ms before the following navigator frame. Each interleaved sequence images another data slice. The navigator frames in the interleaved as well as in the reference sequences are imaged in the same slice position (scanner coordinates).