How to specify image dimensions for reconstructed images

[roshtha]

Hello,

I run SART algorithm for reconstructing images. I understand that the function dataPreprocess resizes the projection data to contain only the needed object and SART algorithm reconstructs images to this projection data size. I have a few questions:

How can I set image dimensions (widthxheight) for reconstructed images? For example I have detector panel pixel density as

parameter.nu = 2816;    
parameter.nv = 3584;

But want to get reconstructed images in dimenstions of 803x1127 (WidthxHeight). How can I specify image dimensions?

Second question is regarding function dataPreprocess. The segmentation crops projection data and we loose information from the removed part. How can we get information from this part for the reconstructed images?

It would be very helpful if you can provide some inputs on this.

Thanks.