65550-Tiwari, Ashok
Resident

Ashok Tiwari, PhD

Resident Appointee

Bio

Ashok Tiwari is the Chief Medical Physics Resident in the Department of Radiation Oncology at IU Health. He earned his Ph.D. in physics with a concentration in nuclear medicine from the University of Iowa in 2022, followed by a year and a half as a postdoctoral researcher at Oak Ridge National Laboratory. In 2023, he completed his CAMPEP Certificate in Medical Physics from Wake Forest University.

His primary focus is on the physics of cancer treatment, particularly through the application of radiation. His research interests lie at the intersection of radiation physics, radiopharmaceutical therapy, and Monte Carlo simulations. Outside of his professional life, he finds joy in cycling and appreciates the tranquility of nature.

For more detailed information about him, visit: https://ashok-tiwari.github.io/

Key Publications

Tiwari A., Andriotty M., Agasthya G., Sunderland J., Osborne D., and Kapadia A. Dosimetric and biological impact of activity extravasation of radiopharmaceuticals in PET imaging. Med Phys, 2024;1-13. https://doi.org/10.1002/mp.17520

Tiwari A., Merrick M., Graves S., and Sunderland J. J. Monte Carlo evaluation of hypothetical long axial field-of-view PET scanner using GE Discovery MI PET front-end architecture. Med Phys, 49:1139-1152, 2022.

Graves S., Martin M., Tiwari A., Merrick M., and Sunderland J. J. SIR-Spheres® activity measurements reveal systematic miscalibration, J Nucl Med 2022; 63:1131-1135, DOI: 10.2967/jnumed.121.262650. 

Tiwari A., Sunderland J., Graves S., Strand S., and Flynn R. Absorbed dose distributions from beta-decaying radionuclides: experimental validation of Monte Carlo tools for radiopharmaceutical dosimetry. Med Phys, 47(11):5779-5790, 2020. 

Merrick M. J., Rotsch D. A., Tiwari A., Nolen J., Brossard T., Song J., Wadas T. J., Sunderland J. J., and Graves S. A. Imaging and Dosimetric Characteristics of 67Cu. Phys Med Biol 66, 035002, 2021. 

Tiwari A., Graves S., and Sunderland J. The Impact of Tissue Type and Density on Dose Point Kernels for Patient-Specific Voxel-Wise Dosimetry: A Monte Carlo Investigation. Radiat Res, 193 (6): 531-542, 2020. 

Merrick M. J., Rotsch D. A., Tiwari A., Nolen J., Brossard T., Song J., Wadas T. J., Sunderland J. J., and Graves S. A. Half-Life of 67Cu, J. Phys. Commun. 5 085007, 2021.

Tiwari A., Zhang C., Mei D.-M., and Cushman P. Observation of annual modulation induced by γ rays from (α, γ) reactions at the Soudan Underground Laboratory, Phys Rev C, Vol. 96, No. 4, 2017.

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