From 7c97471bd0b1184e75f06340045a884955353fdc Mon Sep 17 00:00:00 2001
From: Tomoyuki SADAKANE <40597344+tsadakane@users.noreply.github.com>
Date: Thu, 2 Feb 2023 23:02:45 +0900
Subject: [PATCH] Fix FDK option usegpufft option not working

---
 MATLAB/Algorithms/FDK.m      |  2 +-
 MATLAB/Utilities/filtering.m | 12 +++++++-----
 2 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/MATLAB/Algorithms/FDK.m b/MATLAB/Algorithms/FDK.m
index 900af71a..00500523 100644
--- a/MATLAB/Algorithms/FDK.m
+++ b/MATLAB/Algorithms/FDK.m
@@ -71,7 +71,7 @@
     proj(:,:,ii) = w.*proj(:,:,ii);
 end
 %% Fourier transform based filtering
-proj = filtering(proj,geo,angles,parker); % Not sure if offsets are good in here
+proj = filtering(proj,geo,angles,parker, 'usegpufft', usegpufft); % Not sure if offsets are good in here
 
 % RMFIELD Remove fields from a structure array.
 geo=rmfield(geo,'filter');
diff --git a/MATLAB/Utilities/filtering.m b/MATLAB/Utilities/filtering.m
index 0a550cb4..7a8cc874 100644
--- a/MATLAB/Utilities/filtering.m
+++ b/MATLAB/Utilities/filtering.m
@@ -68,11 +68,13 @@
         fproj = (zeros(filt_len,geo.nDetector(2),'single'));
 
         fproj(round(filt_len/2-geo.nDetector(1)/2+1):round(filt_len/2+geo.nDetector(1)/2),:) = proj(:,:,ii);
-
-        fproj = fft(fproj);   
-        fproj = fproj.*filt;
-        fproj = (real(ifft(fproj)));
-
+        if usegpufft==1
+            fproj = ApplyFbpFiltration(fproj, filt, gpuids);
+        else
+            fproj = fft(fproj);   
+            fproj = fproj.*filt;
+            fproj = (real(ifft(fproj)));
+        end
         if parker
             proj(:,:,ii) = fproj(round(end/2-geo.nDetector(1)/2+1):round(end/2+geo.nDetector(1)/2),:)/2/geo.dDetector(1)*(2*pi/  (pi/angle_step)   )/2*(geo.DSD(ii)/geo.DSO(ii));
         else