1. Department of Electrical and Computer Engineering, University of Wisconsin‐Madison, Madison, Wisconsin 53705 and Department of Medical Physics, University of Wisconsin‐Madison, Madison, Wisconsin 53705
2. Department of Medical Physics, University of Wisconsin School of Medicine and Public Health, University of Wisconsin‐Madison, Madison, Wisconsin 53705
3. Department of Medical Physics, University of Wisconsin School of Medicine and Public Health, and Department of Electrical and Computer Engineering, University of Wisconsin‐Madison, Madison, Wisconsin 53705