Curriculum Vitae

Name: Theocharis Berris

Place of residence: Mödling, Lower Austria

Place of birth: Ioannina, Greece



Curriculum Vitae

November 2007 – July 2010 MSc in Medical Physics – Radiation Physics

University of Crete, Greece. Grade: “Excellent” (9.40/10).

MSc Thesis: “Monte Carlo simulation of radiotherapeutic techniques for the treatment of heterotopic ossification   and breast cancer: Calculation of radiation dose to sensitive organs” (in Greek language).

September 1999 – September 2004 BSc in Physics

University of Ioannina, Greece. Grade: “Very Good” (7.29/10) (*).

(*) Distinction: 1st at graduation ceremony grade ranking.


Work experience
March 2017 – Today Freelance Consultant

  • QA specialist for the IAEA Safeguards e-learning project: Reporting Obligations for International Transfers of Nuclear Material (Facilia Projects)
  • Working on multidisciplinary projects at the meeting point of science and technology. Except for deep understanding of nuclear science and radiation protection/safety, my experience extends into the domains of complex project management, IT business analysis, knowledge management and data analysis. I consistently use my advanced IT skills to boost the innovative nature of projects I am involved in.
  • Mobile App development


November 2014 – Today Consultant, United Nations Committee on the effects of Atomic Radiation (UNSCEAR)

Working on:

  • IT business management for the Fukushima Follow-up Project
  • UNSCEAR Global Survey on Medical Radiation Usage and Exposure from 2006 onwards



March 2015 – December 2016 Consultant, International Atomic Energy Agency (IAEA)

Department of Nuclear Sciences and Applications. Division of Human Health. Dosimetry and Medical Radiation Physics Section.


Main duties:

The IAEA Moodle platform (CLP4NET) is hosted on the IAEA cloud:

April 2014 – June 2015 University assistant, Technical University of Vienna (TU Wien)

Institute of Sensor and Actuator Systems, Department of Industrial Sensor Systems.

Main duties/research interests:

  • Finite element analysis and simulations of Microelectromechanical devices (MEMS)
  • Biomedical engineering
  • Microfluidics
  • Lab-on-a-chip
  • Teaching to postgraduate students


December 2011 – December 2013 Consultant, International Atomic Energy Agency (IAEA)

Radiation Protection of Patients Unit, Department of Nuclear Safety and Security.

Main duties:

  • Enhancing and strengthening the base of users of the Radiation Protection of Patients (RPOP) website’s social media (SM) through posting of information and guidance on SM webpages
  • Maintaining oversight of SM channels including technical issues
  • Developing scientific material for posting on the RPOP website (
    • Articles
    • Posters/graphics
    • Videos/e-learning modules
  • Content management of the RPOP website
  • Activities pertaining to radiation protection for referring physicians
  • Activities pertaining to project on long-term tracking of patient radiation exposure
  • Assisting in analysis of patient dose management results (optimization)
  • Participating in writing of scientific publications for the RPOP Unit


February 2011 – December 2011 Intern, International Atomic Energy Agency (IAEA)

Radiation Protection of Patients Unit, Department of Nuclear Safety and Security.

Main duties:

  • Standardize and update information on Twitter and Facebook to allow sooner announcement of its availability
  • Prepare draft information for regularly posting, on the social media on sub-weekly basis
  • Gain insight on listening to users through their communications
  • Promote networking by identifying enthusiastic users in order to promote the message of patient radiation protection
  • Extend the user base of the unit’s social media accounts
  • Assist in publications of patient dose management actions


July 2010 – Today Research Associate, University of Crete, Greece

Conducting research in Medical Physics. This fruitful collaboration has yielded a number of publications in the last few years.


October 2008 – September 2009 Medical Physics Resident, University Hospital of Iraklion, Crete, Greece

Main Duties: Provided (as a supervised trainee) Medical Physics services related to the following:

  • October 1st 2008 – January 31st 2009: Nuclear Medicine Department (SPECT, cardiac SPECT)
  • February 1st 2009 – May 31st 2009: Radiology Department (conventional radiography, digital radiography and computed tomography, magnetic resonance imaging, interventional radiology)
  • June 1st 2009 – September 30th 2009: Radiation Therapy Department (conventional radiation therapy, 3-d conformal radiation therapy, brachytherapy)

After the end of the Medical Physics Residency 10 more months of Thesis work were required for completion of the Postgraduate Program.

March 2007 – October 2007 Retail sales of consumer electronics,

Main duties:

  • Advising clients on selecting the best products that would suit their specific needs (including building of custom PC systems)
  • Daily management of the product inventory of the retail store
  • Providing elementary repair services as possible at the store
  • Managing deliveries of goods to clients


August 2005 – January 2007 Officer Cadet of the Special Forces of the Hellenic Army

Currently holding the rank of Reserve Second Lieutenant.

Main Duties:

  • Training of staff in techniques and tactics of standard and unconventional warfare/battle
  • Training of staff in the use of mortars (indirect fire weapons)
  • Physical training of staff in the designated hours (duty assigned for one or two weeks each month)
  • Managing staff to make sure that the everyday program of the unit regarding safety and security service, tasks, training and rest hours is accurately observed (duty assigned for one or two weeks each month).
  • Organization of training activities of the unit such as target shooting training sessions
  • Providing services as “overnight security officer”. Responsible for everything in the unit after normal working hours when all other professional officers have left the unit (duty assigned 4-6 times a month)
  • Took responsibility to assemble and get involved with an air-conditioning units service team, using previous knowledge acquired from summer work in family business


Mother tongue Greek
Other languages
  • English (proficient)
  • French (basic knowledge)
  • German (basic knowledge)


IT skills
  • Proficient internet user. Ability to access and filter information effectively and efficiently
  • Monte Carlo codes: MCNP5, MCNPX 2.5.0, GATE 6.2.0
  • Finite element analysis and simulation software: COMSOL Multiphysics
  • Programming: Fortran, Matlab (for image processing purposes), HTML, C# (for 3-D interactive environment development), Python and R (data analysis and machine learning), Java (beginner)
  • Office suites and scientific software (Office, OriginPro, Mathematica)
  • 3-D graphics and rendering (AutoCad, Sketchup, Kerkythea)
  • Image Processing (Photoshop, GIMP, Image Pro Plus, ImageJ)
  • Audio and video editing (various programs)
  • Website content management: Drupal, WordPress, custom CMS systems
  • Interactive e-learning training material: Adobe Captivate, Adobe Presenter, Articulate Storyline, Moodle LMS
  • Internet of Things: Arduino platform and compatible sensors
  • Educational simulations (Sketchup, Blender)
  • 3D interactive environment development for training purposes (Unity 3D)
  • Data mining and visualisation (Tableau Public)
  • Data analysis, machine learning and statistical modelling (Gretl, SQL Databases, RStudio, Anaconda – Python)
  • Computer hardware and software repairs
  • Mobile application development  (MIT AppInventor, Android studio)


Other interests
May 2012 – October 2013 Corresponding member of International Commission on Radiological Protection (ICRP) Task Group 88: Radiological Protection in Cone Beam CT
2012 – 2015
February 2011 – October 2013
  • Assistant to the Secretary General of the IOMP
  • Content management for the IOMP website
2015 – 2018 Member of the Education and Training Committee of the International Organization for Medical Physics (IOMP)
2017 – 2018 Member of the ‘Ask EuroSafe Imaging’ subgroup, with a focus on paediatric imaging topics
2012 – Today IAEA Expert advising on issues related to radiation protection and safety



November 24, 2008 Solid state detectors in medical imaging (review) (*)
January 26, 2009 Therapeutic applications of radioiodine 131 (*)
February 2, 2009 Radiation protection regulations for radioiodine therapy departments (*)
February 16, 2009 Technological advances in multi detector computed tomography (review) (*)
March 23, 2009 Quality control of digital imaging systems (*)
May 4, 2009 Methods for assessing bone status using non ionizing radiation (*)
May 11, 2009 Physical and technological aspects of biomaterials (*)
April 12, 2010 Biological effects of electromagnetic fields (*)
February 7, 2011 Digital, solid-state detectors and image quality in Medical Imaging (*)
(*) Lectures in Greek language at the “Postgraduate sessions in   Medical Physics”, organized by the Department of Medical Physics of the University of Crete, Greece



Visit my Google Scholar Profile

Peer reviewed articles
  1. T Berris, K Perisinakis, AE Papadakis, J Damilakis. Comparison of methods for assessing geometric efficiency on multi-detector CT scanners. Phys Med 2013;29(3):312-22
  2. T Berris, M Mazonakis, J Stratakis, A Tzedakis, A Fasoulaki, J Damilakis. Calculation of organ doses from breast cancer radiotherapy: a Monte Carlo study. J Appl Clin Med Phys 2013;14(1):133-146
  3. T Berris, R Gupta, M M Rehani. Radiation dose from cone beam CT in neuroradiology applications. AJR Am J Roentgenol 2013;200:755–61
  4. MM Rehani , DP Frush, T Berris, AJ Einstein. Patient radiation exposure tracking: Worldwide programs and needs—results from the first IAEA survey. Eur J Radiol 2012;81:e968-76
  5. MM Rehani, T Berris. International Atomic Energy Agency study with referring physicians on patient radiation exposure and its tracking: a prospective survey using a web-based questionnaire. BMJ Open 2012;2(5):DOI:10.1136/bmjopen-2012-001425
  6. MM Rehani, T Berris. Radiation Exposure Tracking: Survey of Unique Patient Identification Number in 40 Countries. AJR Am J Roentgenol 2013;200:776–9
  7. MM Rehani, T Berris. Templates and existing elements and models for implementation of patient exposure tracking. Radiat Prot Dosimetry 2013, Jul 22 [Epub ahead of print]
  8. T Berris, M Mazonakis, S Kachris, J Damilakis. Peripheral Organ Doses From Radiotherapy For Heterotopic Ossification Of Non-Hip Joints: Is There A Risk For Radiation-Induced Malignancies? Phys Med, 2013;pii: S1120-1797(13)00398-0. doi: 10.1016/j.ejmp.2013.09.003. [Epub ahead of print]
  9. M Mazonakis, T Berris, E Lyraraki, J Damilakis. Cancer risk estimates from radiation therapy for heterotopic ossification prophylaxis after total hip arthroplasty. Med Phys, 2013;40(10):1017102
  10. M Mazonakis, T Berris, C Varveris, E Lyraraki, J Damilakis. Out-of-field organ doses and associated radiogenic risks from para-aortic radiotherapy for testicular seminoma. Med Phys, 2014;41(5):051702. doi: 10.1118/1.4870376
  11. M Mazonakis, T Berris, E Lyraraki, J Damilakis. Radiation therapy for stage IIA and IIB testicular seminoma: peripheral dose calculations and risk assessments Phys Med Biol 2015;60(6):2375. doi:10.1088/0031-9155/60/6/2375
  12. J Devkota, G Kokkinis, T Berris, M Jamalieh, et al. A novel approach for detection and quantification of magnetic nanomarkers using a spin valve GMR-integrated microfluidic sensor. RSC Adv. 2015;5(63):51169-51175
  13. M Jamalieh, G Kokkinis, C Haiden, T Berris, F Keplinger, I Giouroudi. Microfluidic platform for pathogen load monitoring. Microelectronic Engineering 158:91-4
  14. R Mitterboeck, G Kokkinis, T Berris, F Keplinger, I Giouroudi. Magnetic microfluidic system for isolation of single cells. SPIE Microtechnologies, 951809-951809-9
  15. A Meghzifene, T Berris. SU-F-E-16: A Specific Training Package for Medical Physicists in Support to Nuclear and Radiological Emergency Situations. Med Phys. 2016;43(6):3356. doi: 10.1118/1.4955702
  16. T Berris, D Žontar M M Rehani. Survey on impact of regulations on radiation safety and development of radiation safety culture in 25 countries (J Med Imaging (Bellingham). 2017;4(3):031204. doi: 10.1117/1.JMI.4.3.031204. Epub 2017 Jun 28)
  17. T Berris, F Nüsslin, A Meghzifene, A Ansari, E Herrera-Reyes, N Dainiak, M Akashi, D Gilley, A Ohtsuru. Nuclear and radiological emergencies: Building capacity in medical physics to support response. Phys Med. 2017;42:93-8
IAEA Publications
  • Training Handbook: Train the trainers Workshop on Medical Physics Support for Nuclear or Radiological Emergencies
  • Guidance for Medical Physicists in Support of Nuclear or Radiological Emergencies (in preparation)
  • Pocket Guide for Medical Physicists Supporting Response to Nuclear or Radiological Emergencies (in preparation)
  • Medical Management of Radiation Injuries. IAEA Safety Reports Series  No.XX (Update to the IAEA Safety Reports Series  No.2) (in preparation)
ICRP Publication
Book chapters
Non peer reviewed articles
International conference presentations
Oral presentations
  • T Berris, M Mazonakis, J Stratakis, A Tzedakis and J Damilakis, “Determination of radiation dose and risk for second cancer induction from radiotherapy of heterotopic ossification: A Monte Carlo study” (International Conference on Radiation Protection in Medicine, 2010, Varna, Bulgaria)
Poster presentations
  1. T Berris, K Perisinakis, AE Papadakis and J Damilakis. A   comparison of two methods for the determination of free-in-air geometric efficiency in MDCT (International Conference on Radiation Protection in Medicine, 2010, Varna, Bulgaria)
  2. T Berris, M Mazonakis, J Stratakis, A Tzedakis, A Fasoulaki, J Damilakis. Calculation of organ doses from radiotherapy of breast cancer using Monte Carlo methodology (European Congress of Radiology 2011, Vienna, Austria)
  3. M Mazonakis, T Berris, C Varveris, J Damilakis. Postoperative irradiation for the prevention of heterotopic ossification in total hip arthroplasty: is the cancer risk low? (European Congress of Radiology 2013, Vienna, Austria)
  4. M Mazonakis, T Berris, C Varveris, J Damilakis. EP-1793. Organ doses and cancer risk from radiation prophylaxis for heterotopic ossification of the elbow: A Monte Carlo study (ESTRO 33, Vienna, Austria)
  5. M Mazonakis, T Berris, J. Damilakis. Absorbed dose to in-field and partially in-field critical organs from modern radiation therapy techniques for stage I-II testicular seminoma (European Congress of Radiology 2015, Vienna, Austria)
  6. M Mazonakis, T Berris, C Varveris, J Damilakis. SP080.1 – Estimation of the second cancer risk from adjuvant radiation therapy for stage I seminoma of the testis (World Congress on Medical physics and Biomedical Engineering, 2015, Toronto, Canada)
  7. M Mazonakis, T Berris, E Lyraraki, J Damilakis. SP154.1 – Out-of-field radiation dose to critical organs due to radiotherapy for testicular seminoma with modified dog-leg fields: is there a risk for stochastic effects? (World Congress on Medical physics and Biomedical Engineering, 2015, Toronto, Canada)
  8. A Meghzifene, T Berris. SU-F-E-16: A Specific Training Package for Medical Physicists in Support to Nuclear and Radiological Emergency Situations. Med Phys. 2016 Jun;43(6):3356. doi: 10.1118/1.4955702






Siding with reason