im saving two images but how do i change their names ?

Hi, Basically the code saves the two images, but how would i go about giving each image a name? because atm they are overwriting each other because i haven't assigned a name to them yet.

Savesinog = uigetdir(workdir,'Please select the destination directory');
imagetype= ['.tif']
FileName = fullfile(Savesinog,imagetype)

imwrite(sinog_2,FileName); 
imwrite(iradonsinog,FileName);

[Adam]

Just add a name into the fullfile call. You have a directory and an extension at the moment with no filename.

FileName = fullfile( Savesinog, someFilename, imagetype );

[Stephen23]

fullfile does not magically append the file extension, this has to be done independently of fullfile:

FileName = fullfile(Savesinog, [someFilename,imagetype]);