I have created a nifti file in my own fMRI program. If I look at it with 3dinfo it says that there are 160 volumes. If I look at it with fslinfo it says that there is only one volume. How do I change the nifti header such that AFNI understands that there is only one volume?

This is what I have changed so far

nifti_image *outputNiftiStatisticsEPI = nifti_copy_nim_info(inputfMRI);
outputNiftiStatisticsEPI->nt = 1;
outputNiftiStatisticsEPI->dim[4] = 1;
outputNiftiStatisticsEPI->nvox = EPI_DATA_W * EPI_DATA_H * EPI_DATA_D;





3dinfo bold_pvalues_contrast1_EPI.nii.gz
++ 3dinfo: AFNI version=AFNI_2011_12_21_1014 (Aug 13 2014) [64-bit]

** WARNING: NIfTI file bold_pvalues_contrast1_EPI.nii.gz dimensions altered since AFNI extension was added

Dataset File: bold_pvalues_contrast1_EPI.nii.gz
Identifier Code: NII__wFvfILlbwjznQCEILpaJQ Creation Date: Wed Apr 29 14:38:11 2015
Template Space: TLRC
Dataset Type: Anat Bucket (-abuc)
Byte Order: LSB_FIRST {assumed} [this CPU native = LSB_FIRST]
Storage Mode: NIFTI
Storage Space: 540,672 (541 thousand [kilo]) bytes
Geometry String: "MATRIX(-3.125,0,0,0,0,-3.125,0,0,0,0,4,0):64,64,33"
Data Axes Tilt: Plumb
Data Axes Orientation:
first (x) = Left-to-Right
second (y) = Posterior-to-Anterior
third (z) = Inferior-to-Superior [-orient LPI]
R-to-L extent: -196.875 [R] -to- 0.000 -step- 3.125 mm [ 64 voxels]
A-to-P extent: -196.875 [A] -to- 0.000 -step- 3.125 mm [ 64 voxels]
I-to-S extent: 0.000 -to- 128.000 [S] -step- 4.000 mm [ 33 voxels]
Number of time steps = 160 Time step = 2.00000s Origin = 0.00000s
-- At sub-brick #0 '?' datum type is float: 0 to 1127


fslinfo bold_pvalues_contrast1_EPI.nii.gz
data_type FLOAT32
dim1 64
dim2 64
dim3 33
dim4 1
datatype 16
pixdim1 3.125000
pixdim2 3.125000
pixdim3 4.000000
pixdim4 2.000000
cal_max 1.0000
cal_min 0.0000
file_type NIFTI-1+