thanks all for your suggestions, I ll try my best to incorporate them.
huge kudos sdanisch for your multithreaded design.
I think if radon/iradon ever goes out as package, optimizations like that will be crucial - but I afraid I don’t have enough qualification to implement it properly.
(well, unless somebody invents faster brackets… 
).
As to semicolons - they remind about my sorrows.
Promise to drop them when Julia/Matlab processing time ratio is at least 2/1 here
Many thanks Tobias for your tomography code and for introducing me to Julia.
Y.
/Yuriy Alexandrov
…