Muhammad Nasir Ullah

Phone: 650-285-9090 E-mail »

Muhammad Nasir Ullah has received a BS degree in Electronic Engineering from International Islamic University, Islamabad (IIUI) Pakistan in Jun 2012 and an integrated MS + Ph.D. degree in Bio-Convergence Engineering from Korea University, Seoul, South Korea under the supervision of Professor Jung-Yeol Yeom in Feb 2020. His Ph.D. thesis was focused on detector design for Nuclear Medicine (NM) system and NM-Ultrasound hybrid systems.

His area of research interest is radiation detection and measurement for medical applications. He has been working on detector design for Positron Emission Tomography (PET) system, intraoperative gamma probe detector, beta/gamma discrimination, and hybrid Ultrasound-gamma probe. He has also been working on frontend discrete circuit designs for various types of radiation and Ultrasound (US) detectors. He has published 6 peer-reviewed articles as the first author while 2 as co-author. He has also 4-patents under his name in S. Korea.


  • Integrated MS + PhD in Bio-Convergence Engineering (Sep 2015-Feb 2020), Molecular Imaging System Laboratory (MISL), department of Bio-Convergence Engineering, Korea University, Seoul, South Korea. Thesis Title: “Detector Designs for Nuclear Medicine and Hybrid Ultrasound-Gamma Probe".
  • BS in Electronic Engineering (Sep 2008-June 2012), department of Electronic Engineering, International Islamic University, Islamabad, Pakistan. Final Year Project: "Dual Axis Solar Tracking and Sinusoidal Inverter"


Honors & Awards

  • IEEE NSS/MIC Trainee Grant (2020)
  • Best paper Award, Korea University (2020)
  • IEEE NSS/MIC Trainee Grant (2016)
  • Korea University, Ph.D. Scholarship (2015-2020)
  • 3rd Prize, Final Year Project, International Islamic University Islamabad, Pakistan (2012)


  • 1-mm Resolution Dual Panel Clinical PET


1. Ullah MN, Pratiwi E, Park JH, Yamamoto S, Kamada K, Yoshikawa A, Yeom JY. Studies on sub-millimeter LYSO: Ce, Ce: GAGG, and a new Ce: GFAG block detector for PET using digital silicon photomultiplier. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment. 2018 Dec 11; 911:115-22
2. Ullah MN, Pratiwi E, Cheon J, Choi H, Yeom JY. Instrumentation for time-of-flight positron emission tomography. Nuclear medicine and molecular imaging. 2016 Jun 1;50(2):112-22.
3. Ullah MN, Park C, Pratiwi E, Kim C, Choi H, Yeom JY. A new positron-gamma discriminating phoswich detector based on wavelength discrimination (WLD). Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 2019 Aug 26:162631.
4. Ullah MN, Pratiwi E, Park JH, Lee K, Choi H, Yeom JY. Wavelength discrimination (WLD) TOF-PET detector with DOI information. Physics in Medicine & Biology. 2020 Feb 28;65(5):055003.
5. Ullah MN, Park JH, Pratiwi E, Kim GB, Yeom JY. Wavelength discrimination (WLD) detector optimization for time-of-flight positron emission tomography with depth of interaction information. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 2020 Dec 1; 982:164498.
6. Park C, Ullah MN, Kim C, Cho S, Yeom JY. Investigation of optical properties of ceramic Ce: GAGG by high temperature annealing. Journal of the Korean Physical Society. 2019 Dec;75(12):962-7.
7. Pratiwi E, Bae S, Lee H, Ullah MN, Lee B, Lee K, Yeom J. Collimators for Gamma Dual Energy CT Arch-Detector: A Simulation Study. Journal of the Korean Physical Society. 2020 Jan;76(1):79-85.
8. Ullah, Muhammad N.; Park, Yuseung; Kim, Gyeong B.; Kim, Chanho; Park, Chansun; Choi, Hojong; Yeom, Jung-Yeol. 2021. "Simultaneous Acquisition of Ultrasound and Gamma Signals with a Single-Channel Readout" Sensors 21, no. 4: 1048.