pad_method='extend';
% Absorption image ('mu', in cm-1)
-mu=edfread('attenuation.edf'); % map of mu in cm-1
+mu=edfread('images/attenuation.edf'); % map of mu in cm-1
[m n]=size(mu)
absorption=mu*100; % in m-1 , to be consistant with lambda!! /10 to have less attenuation
beta=(lambda/(4*pi))*absorption; % one slice of beta /!\ units
-delta_beta=edfread('delta_beta_map_1200.edf');
+delta_beta=edfread('images/delta_beta_map_1200.edf');
delta=delta_beta.*beta;
## Noise addition