# List-Mode Reconstruction

**URL:** <https://castor-project.discourse.group/t/list-mode-reconstruction/169>\
**Category:** General Discussions\
**Created:** [September 4, 2020, 4:29pm UTC](https://castor-project.discourse.group/t/list-mode-reconstruction/169 "2020-09-04T16:29:29Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Sadek\_Nehmeh](https://avatars.discourse-cdn.com/v4/letter/s/dc4da7/32.png) [@Sadek\_Nehmeh](https://castor-project.discourse.group/u/Sadek_Nehmeh)\
**Post date:** [September 4, 2020, 4:29pm UTC](https://castor-project.discourse.group/t/list-mode-reconstruction/169/1 "2020-09-04T16:29:29Z")

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Dear Castor Users,

I am new to castor! I am trying to reconstruct data from a GATE simulation of the Siemens Biograph Vision PET scanner. I can successfully convert the root data into castor histogram format and reconstruct. However when I repeat the exercise using List-Mode format I get blank images. I would appreciate any suggestions.

Regards,

Sadek A. Nehmeh  
Weill Cornell Medical College, New York, NY