try to fix shape error in fit results

Author: petravanhoudt

src/standardized/PVH_KB_NKI_IVIMfit.py

@@ -55,8 +55,8 @@ def ivim_fit(self, signals, bvalues=None):
         signals = np.reshape(signals, (1, 1, 1, len(signals)))  # assuming that in this test the signals are always single voxel
         fit_results = self.NKI_algorithm(signals,bvalues)
 
-        D = fit_results[0]/1000
-        f = fit_results[1]
-        Dstar = fit_results[2]/1000
+        D = fit_results[0][0,0,0]/1000
+        f = fit_results[1][0,0,0]
+        Dstar = fit_results[2][0,0,0]/1000
 
         return f, Dstar, D