· Full scholarship, from Iran Ministry of Science and Education, for PhD program since September 2004-September 2008.

· Visiting research scholar, Department of Computer Science (Discrete Imaging and Graphics group), The Graduate Center, City University of New York, New York, USA. Aug. 2008-Dec. 2008.

· Loading expenses to participate in the workshop entitled "Mathematical Problems, Models and Methods in Biomedical Imaging ", February 8-12, 2010 at the Institute for Pure and Applied Mathematics situated on the UCLA campus, USA.

· Visiting Scholar, Department of Mathematics, Linkoping University, Linkoping, Sweden. 1-7 May of 2010 during Workshop on Inverse Problems and Applications.

· Visiting, Department of Applied Mathematics and Computer Science, Technical University of Denmark, Lyngby, Denmark, August 18-25, 2013.

· Visiting, Department of Applied Mathematics and Computer Science, Technical University of Denmark, Lyngby, Denmark, June 24-July 6, 2015.

· Institute  for  Research  in  Fundamental Sciences, School of Mathematics, Non Resident Researcher (2015 - Present),( grant No. 94650073).