Clinical Dosimetry 2

Course guarantor:

Lecturer:

Tutor:

Supervisor:

Department of Dosimetry and Application of Ionizing Radiation

Synopsis:

Learning outcomes of the course unit The aim of the course is to acquaint students with advanced dosimetric methods in accordance with the rapid development of technologies in the field: small field dosimetry, dosimetry in magnetic field, proton beams, special technologies. Furthermore, it should deepen theoretical knowledge (cavity theory).

Requirements:

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Syllabus of lectures:

1. Absolute and relative proton dosimetry - scanned beams, radiation protection, possibilities of in vivo dosimetry

2. Dosimetry in specific irradiation techniques - Tomotherapy, Cyber Knife, TBI, Leksell Gamma Knife, IORT

3. Advanced cavity theory (Bragg Gray, Spencer-Attix) in clinical dosimetry, fulfillment of theory assumptions

4. General cavity theory, Burlin cavity theory in clinical dosimetry, cavity theory in small field dosimetry

5. Ratios of water and detector material, physical nature of ventricular perturbation factors, shielded and unshielded diodes, Monte Carlo calculations in clinical dosimetry

6. Small field dosimetry: Technology overview, problems related to small field dosimetry and condition characteristics

7. Dosimetry of small fields: Errors and inaccuracies, formalism, correction factors, overview of suitable detectors

8. Small Field Dosimetry: Detector Requirements, IAEA AAPM Recommendations 483 "

9. Dosimetry in magnetic field - description of MRI-line instrument, physical nature of phenomena influencing dosimetric measurements in magnetic field

10. Dosimetry in magnetic field - reference dosimetry by ionization chambers, correction factors, relative dosimetry, suitable instrumentation - detectors, phantoms

11. Dosimetry in magnetic field - data measurement in planning system, calculation of batch distribution

12. Calculation of shielding of linear accelerator, therapeutic X-ray, brachytherapy unit and CT instrument

13. Practical examples, exercises, calculations

Syllabus of tutorials:

Study Objective:

Knowledge:

Knowledge of the requirements for dosimetry of small-volume clinical beams, dosimetry in the magnetic field, cavity theory.

Abilities:

Optimization and reduction of undesirable doses in the application of ionizing radiation in medicine.

Study materials:

Key references:

[1] P. Andreo, D. T. Burns, A. E. Nahum, J. Seuntjens a F. H. Attix. Fundamentals of Ionizing Radiation Dosimetry, Wiley-VCH, Weinheim, 2017.

[2] IAEA Technical Report Series No483: Dosimetry of Small Static Fields Used in External Beam Radioterapy: An International Code of Practice for Reference and Relative Dose Determination, IAEA Vienna 2017.

Recommended references:

[3] H. Paganetti. Proton therapy physics. Boca Raton, FL: CRC Press, 2012. Series in medical physics and biomedical engineering, 20.

[4] E. B. Podgoršak, Radiation physics for medical physicists. 2nd, enl. ed. Springer, Heidelberg, 2010.

[5] F. H. Attix, Introduction to Radiological Physics and Radiation Dosimetry, Wiley, New York, 1986.

[6] D. J. O'Brien, D. A. Roberts, G. S. Ibbott a G. O. Sawakuchi. Reference dosimetry in magnetic fields: formalism and ionization chamber correction factors. Medical Physics. 2016, 43(8Part1), 4915-4927.

Note:

Further information:

No time-table has been prepared for this course

The course is a part of the following study plans:

• Jaderné inženýrství - Aplikovaná fyzika ionizujícího záření (elective course)
• Radiolgická fyzika (compulsory course in the program)