COURSE UNIT TITLE

: PHOTON AND ELECTRON DOSIMETRY

DEGREE PROGRAMMES

Description of Individual Course Units

Course Unit Code Course Unit Title Type Of Course D U L ECTS
MDF 6024 PHOTON AND ELECTRON DOSIMETRY ELECTIVE 3 2 0 8

Offered By

Medical Physics

Level of Course Unit

Third Cycle Programmes (Doctorate Degree)

Course Coordinator

PROFESSOR DOCTOR AYŞE NUR DEMIRAL

Offered to

Medical Physics

Course Objective

Learning properties of the photon beam and dose calculation algorithms, characteristics of the electron beam, electron dosimetry, and dose calculation algorithms; gaining knowledge and skills of dose measurements and calculations.

Learning Outcomes of the Course Unit

1   Gaining knowledge about the properties of the photon beam, and in obtaining dosimetric parameters directly and indirectly.
2   Gaining knowledge about the different dose protocols used in actual dose (absorbed dose) measurement and dose measurements required for photon beam treatment planning
3   Being capable of checking the accuracy of dose calculation algorithms used in computerized treatment planning system by means of measurement methods
4   Gaining knowledge about all beam and device properties and dosimetry parameters of the electron beams.
5   Gaining knowledge about the differences among absorbed dose protocols.
6   Being capable of making dose measurements in water phantom, obtaining dosimetric parameters and installing the data to the computerized treatment planning system.

Mode of Delivery

Face -to- Face

Prerequisites and Co-requisites

None

Recomended Optional Programme Components

None

Course Contents

Week Subject Description
1 Structure of linear accelerator, structures affecting dosimetry parameters, relative dosimetry parameters and appropriate measurement methods. Measurement of the scattering factors. Measurement of relative dose parameters.
2 Dose normalization methods. Absorbed dose measurement protocols - IAEA protocols. Small field dose measurements. Small MU dose measurements
3 Absorbed dose measurement protocols - AAPM, HPA, DIN protocols. Dose correction methods for tissue irregularities Checking the prepared patient-specific dose plan by measurement with film dosimetry
4 Dose correction methods in tissues of different densities Dose calculation methods in small fields (smaller than 4x4 cm in diameter) Checking the prepared patient-specific dose plan by measurement with TLD
5 Calculation and measurement methods of the surface dose Dose volume histograms. Measuring the surface doses with parallel plan ion chamber.
6 Verifying the accuracy of the dose distribution when using dose intensity modulated treatment techniques Controlling the accuracy of the central axis doses when using dose intensity modulated treatment techniques Checking the prepared patient-specific dose plan by measurement with a series of the ion chambers.
7 Mid-Term exam
8 Matter-electron interactions, the formation of bremms rays. Energy properties of the electron beams Practice on energy properties of the electron beams (E0, Ez, and Rap) Implementation of IAEA 277 protocol to the electrons
9 Properties of the absorbed dose and absorbed dose protocols. Factors affecting depth dose and surface dose of electron beams Implementation of IAEA 398 protocol to the electrons Obtaining the electron depth dose and dose profiles in water phantom
10 Mistakes during depth dose measurements by film dosimetry The symmetry and flatness characteristics of the electron beams and its importance Absorbed dose measurement; finding correction factors for electrons with different energies Measurement of relative dose factors.
11 The definition of efficient source location and its detection Calculation algorithms of the electron beams Measurement of the small field doses for electron beams Measurement of the surface dose of electron beams
12 Detection of relative dose factors treatment planning properties with Features of treatment planning with electron beams, sloping surfaces Manual dose calculations for electron beams, Examination of the dose distribution in sloping surfaces in electron beam treatment planning
13 Properties of the electron beam treatment planning, tissue inhomogeneities Adjacent field problems and solutions for electron beams External and internal blocking, backscattering factors Reducing doses in the conjunction of adjacent electron-fields in the treatment planning system. Investigating the effects of tissue inhomogeneities on the dose distribution in the treatment planning system
14 Special irradiation techniques using electron beams Measuring the thickness of lead that reduces the dose to 5% of the electron beam General evaluation

Recomended or Required Reading

Khan FM. The physics of radiation therapy , Second, Third and Fourth Edition. Lippincott Williams & Wilkins, Philadelphia, 1994, 2003, 2009.
Khan FM, Gerbi BJ. Treatment Planning in Radiation Oncology , Second and Third Edition. Lippincott Williams & Wilkins, Philadelphia, 2007, 2012
Edward C. Halperin, Carlos A. Perez, Luther W. Brady Principles and Practice of Radiation Oncology Third, Fourth and Fifth Edition. Lippincott Williams & Wilkins, Philadelphia, 1997, 2003, 2008.
Wolfgang Schlegel, Thomas Bortfeld, Anca-Ligia Grosu New Technologies in Radiation Oncology Springer, 2006.
Steve Webb, Intensity-Modulated Radiation Therapy Taylor and Francis, 2001. Arro J. Mundt, John C. Roeske Intensity Modulated Radiation Therapy 2005.
P.Mayles, A.Nahum, J.C.Rasenwald Handbook Of Radiotherapy Physics Theory and Practice Taylor and Francis, 2007.
Pam Cherry, Angela M. Duxbury Practical Radiotherapy Physics And Equipment Wiley- Blackwell, 2009.

Planned Learning Activities and Teaching Methods

Using all available technical and dosimetric equipment to make the relevant applications in radiotherapy after having theoretical knowledge about the subject from Turkish and foreign books, periodicals , and protocols.

Assessment Methods

SORTING NUMBER SHORT CODE LONG CODE FORMULA
1 MTE MIDTERM EXAM
2 FIN FINAL EXAM
3 FCG FINAL COURSE GRADE MTE * 0.40 + FIN* 0.60
4 RST RESIT
5 FCGR FINAL COURSE GRADE MTE * 0.40 + RST* 0.60


*** Resit Exam is Not Administered in Institutions Where Resit is not Applicable.

Further Notes About Assessment Methods

None

Assessment Criteria

To be announced.

Language of Instruction

Turkish

Course Policies and Rules

To be announced.

Contact Details for the Lecturer(s)

To be announced.

Office Hours

To be announced.

Work Placement(s)

None

Workload Calculation

Activities Number Time (hours) Total Work Load (hours)
Lectures 14 3 42
Tutorials 14 2 28
Preparations before/after weekly lectures 14 6 84
Preparation for midterm exam 1 15 15
Preparation for final exam 1 25 25
Final 1 1 1
Midterm 1 1 1
TOTAL WORKLOAD (hours) 196

Contribution of Learning Outcomes to Programme Outcomes

PO/LOPO.1PO.2PO.3PO.4PO.5PO.6PO.7PO.8PO.9PO.10PO.11PO.12PO.13PO.14PO.15PO.16PO.17PO.18
LO.134433324223
LO.2345243253224
LO.32355523243223
LO.434433324223
LO.5234433243334
LO.635534224344

CONTACT INFORMATION
Dokuz Eylül Üniversitesi Cumhuriyet Bulvarı No: 144 35210 Alsancak / İZMİR
Phone: +90(232) 412 12 12 - Fax: +90 (232) 464 81 35

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