diff --git a/src/fbp/filter.jl b/src/fbp/filter.jl
index 97d66580..6aced115 100644
--- a/src/fbp/filter.jl
+++ b/src/fbp/filter.jl
@@ -2,7 +2,8 @@
 
 export fbp_filter, fbp_sino_filter
 
-using FFTW
+using FFTW: fft, ifft, fftshift
+
 #using Sinograms: SinoGeom, SinoPar, Window, fbp_ramp, fbp_window, _reale
 
 
diff --git a/src/fbp2/back-fan.jl b/src/fbp2/back-fan.jl
index 1c55de41..fe97d00a 100644
--- a/src/fbp2/back-fan.jl
+++ b/src/fbp2/back-fan.jl
@@ -3,7 +3,7 @@
 export fbp_back
 
 using LazyGrids: ndgrid
-using ImageGeoms: ImageGeom, embed
+using ImageGeoms: ImageGeom #, embed
 #using Sinograms: SinoFan
 
 
diff --git a/src/fbp2/back-par.jl b/src/fbp2/back-par.jl
index 2e31dd46..931afa9c 100644
--- a/src/fbp2/back-par.jl
+++ b/src/fbp2/back-par.jl
@@ -3,7 +3,7 @@
 export fbp_back
 
 using LazyGrids: ndgrid
-using ImageGeoms: ImageGeom, embed
+using ImageGeoms: ImageGeom #, embed
 #using Sinograms: SinoPar
 
 
diff --git a/src/fbp2/fbp.jl b/src/fbp2/fbp.jl
index 4599f3d3..7a39992b 100644
--- a/src/fbp2/fbp.jl
+++ b/src/fbp2/fbp.jl
@@ -2,6 +2,7 @@
 
 export fbp
 
+using FFTW: fft, ifft
 using ImageGeoms: ImageGeom
 # using Sinograms: SinoGeom, SinoPar, SinoFan, SinoMoj, _reale, FBPplan