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Medical Physics

Medical Physics is an applied branch of physics concerned with the application of the concepts and methods of physics to the diagnosis and treatment of human disease. The Medical Physics Division is providing comprehensive Physics and Dosimetric services for the treatment of cancer patients and has expertise in related areas. This division is responsible to the radiation protection of the institution.

The Medical Physicist has acquired expertise in all advanced treatment techniques like 3DCRT, IMRT,IMAT,IGRT,SBRT, SRT, SRS,4D Respiratory gating, etc.


The essential responsibility of Medical Physicist’s clinical practice is to assure the safe and effective delivery of radiation to achieve therapeutic result as prescribed in patient care. The Division services are Dosimetric treatment planning, Commissioning of new radiation generating equipments and Treatment planning systems, calibration of radiation monitoring instruments, QA and maintenance of treatment machines, Verification of Radiation dose delivery, Radiation Safety, room designing, and compliance with radiation safety regulator (AERB).

The Division also advises and assists allied departments like Diagnostic Radiology, Nuclear Medicine and blood bank (GIC) regarding matters of Radiation safety, Radiation source procurement, radiation waste disposal ,Operating licences of the radiation generating equipments, Monitoring of personal dosimetry services and compliance with regulatory authority (AERB).

The efforts of the Division are comprised of Research, Education, Internships and Practical training designed to guide Radiation oncologists, Medical Physicists and Radiotherapy Technologists.

Medical Physics division is equipped with state of art facility. Details of equipments are:

  1. Teletherapy
    • Varian – True Beam Stx Linear accelerator with multiple photon energies of 6MV, 10MV, 15MV, 6FFF and 10 FFF, with electron energies of 6, 9, 12 & 15 MeV and having HD 120 MLC leaves (2.5 mm) along with Portal Dosimetry. This is capable of delivering 3DCRT, IMRT, IGRT, Rapid Arc and Respiratory gating techniques.
    • Elekta – Synergy Linear accelerator with photon energies of 4MV and 6MV, with electron energies of 4, 6, 8, 10, 12 & 15 MeV having 80 Leaves MLC. This is capable of delivering 3DCRT, IMRT and VMAT techniques.
    • Varian – Clinac-iX Linear accelerator with dual photon energies of 6MV & 15MV, electron of 6,9,12 & 15 MeV having Millennium 120 MLC leaves (5mm) along with Portal Dosimetry. This is capable of delivering 3DCRT, IMRT, IGRT, Rapid Arc and Respiratory gating techniques.
    • Siemens – Artiste Linear accelerator with dual photon energies of 6MV & 7FFF, Electrons of 6,9,12,15,18 and 21 MeV and having 160 MLC leaves (5mm),and MV-CBCT. This machine is capable of delivering 3DCRT, IMRT, IGRT and Respiratory gating techniques.
    • Siemens – Primus Linear accelerator having 6MV photon and 58 MLC leaves. This is capable of delivering 3DCRT and IMRT technique.
    • Varian – Acuity Simulator with Amorphous silicon (a-Si) Flat panel Imager which produces a high-quality reference image for daily verification, freeing treatment machines for patient treatment and helping you increase patient throughput.
    • Siemens Somatom Sensation-Open CT- Simulator with high-speed Ultra Fast detectors enabling a virtually simultaneous readout of two projections for each detector element resulting in up to 64-slice acquisition.
  2. Brachy Therapy
    • Elekta – Nucletron Micro-Selectron HDR machine facilitates the brachy application including ICRT, ILRT, IORT, MIAMI, MUPIT and Interstitial Implants.
  3. Treatment Planning Systems
    • Varian – Eclipse
    • Elekta – Manaco
    • Elekta – CMC – XiO
    • Oncentra Master Plan
  4. Record and Verify system
    • Aria, Mosaiq
  5. RT PACS
    • Candelis
  6. Virtual Simulation
    • Soma vision, Monaco SIM, Coherence Dosimetry, Focal SIM and Oncentra
  7. Dosimetry Instruments
    • Arc Check, CIRS 4D moving phantom, Map Check, Daily QA3, Omnipro Accept Film QA, Scanditronix Welhofer pelvis Phantom and IBA Blue Phantom RFA

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Medical physics division is continuously engaged in research projects and training programs.


Following projects are in progress under Medical Physics Division:

  • Dosimetric evaluation and validation of treatment planning algorithm used in Radiation therapy.
  • Influence of Contrast and Density Materials on different radiotherapy techniques in the treatment of carcinogenic tumours using commercially available algorithms.
  • Dosimetric study on impact of large field double isocentre IMRT and VMAT plan.
  • The different dose calculation algorithm effect on large field flattens and unflattend beam plan.


  • Total Body Irradiation
  • Total Skin Electron Therapy


  • Girigesh Yadav, Manindra Bhushan, Abhinav Dewan, Upasna Saxena, Lalit Kumar, et al. Dosimetric Influence of Photon Beam Energy and Number of Arcs on volumetric modulated arc therapy in Carcinoma Cervix: A planning study. Rep Pract Oncol Radiother 22 (2017) 1-9
  • S Ashokkumar, A Nambiraj, SN Sinha, Girigesh Yadav, K Raman, et al. Measurement and comparison of head scatter factor for 7 MV unflattened (FFF) and 6 MV flattened photon beam using indigenously designed columnar mini phantom. Rep Pract Oncol Radiother 20 (2015) 170-180
  • Lalit Kumar, Girigesh Yadav, S Kothanda Raman, Manindra Mishra, Manoj Pal. The Dosimetric Impact of different photon beam energy on Rapid Arc (RA) Radiotherapy planning for Cervix Carcinoma. J Med Phys. 2015 Oct-Dec; 40(4):207-13.
  • Kaur I, Rawat S, Ahlawat P, Kakria A, Gupta G, Saxena U, et al. Dosimetric impact of setup errors in head and neck cancer patients treated by image-guided radiotherapy. J Med Phys 2016;41: 144-148.
  • Lalit Kumar, Girigesh Yadav, S Kothanda Raman, Manindra Mishra, Pawan Singh, et al. Dosimetric Influence of filtered and flattening filter free photon beam on rapid arc planning in case of carcinoma cervix. Rep Pract Oncol Radiother 22 (2017) 10-18.
  • Sharma MK, Mitra S, Saxena U, Bhushan M, Shrivastava H, et al. Is volumetric modulated arc therapy (RapidArc) better than intensity modulated radiotherapy for gynecological malignancies? A dosimetric comparison. J Can Res Ther 2014;10:883-888.
  • David K Simson, Swarupa Mitra, Parveen Ahlawat, Manoj Kumar Sharma, Girigesh Yadav, et al. Dosimetric Comparison between Intensity Modulated Radiotherapy and 3 Dimensional Conformal Radiotherapy in the Treatment of Rectal Cancer. Asian Pac J Cancer Prev, 17 (11), 4935-4937.


  • Ph.D. in Physics in affiliation with Amity University, Noida, Uttar Pradesh
  • One year Internship program for Medical Physics students.
  • DNB -Radiotherapy
  • B.Sc. degree in Radiotherapy
  • Short Term training for radiotherapy professionals
Our Locations
  • Sir Chotu Ram Marg, Sector – 5, Rohini Institutional Area, Rohini, New Delhi, Delhi – 110085, India

    +91-11-47022222 | Fax +91 11 27051037

  • Squadron Leader Mahender Kumar Jain Marg, Block K, Niti Bagh, New Delhi, Delhi 110049

    +91-11-45822222 / +91-11-45822200

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