1. Department of Nuclear, Plasma and Radiological Engineering, University of Illinois at Urbana--Champaign, Urbana, IL, USA
2. Department of Radiology, The University of Chicago, Chicago, IL, USA
3. STFC-UKRI, Rutherford Appleton Laboratory, Didcot, Oxfordshire, U.K
4. Department of Nuclear, Plasma and Radiological Engineering and the Beckman Institute for Advance Science and Technology, University of Illinois at Urbana--Champaign, Urbana, IL, USA