Notes

⁺Mailing address: Stanford Synchrotron Radiation Laboratory, PO Box 4349 MS69, Stanford, California 94309-0210, USA.

¹We have found that the quality of the reconstruction is very sensitive to the accuracy of the data in the central patch. However, we have not performed any quantitative study of their relationship. In the long run, we plan to circumvent the problem by (i) recording the experimental diffraction pattern with the central patch as small as possible and (ii) enlarging our algorithm to allow it to iteratively fill in a small amount of data at the center.