Radiation Therapy Instrumentation 2B

Course code MRSC2570
Available in 2016
2016 Course Timetables


This course discusses the principles and operation of equipment used in radiation therapy.



  • Semester 2 - 2016

Learning Outcomes

1. Discuss the concepts associated with imaging requirements for radiation therapy

2. Explain the principles of treatment planning algorithms including limitations of each

3. Describe basic radiation dosimetry and the fundamental measurements required for linac commissioning

4. Understand the differences between photon and electron treatments including modality choice, treatment planning, QA, pros and cons of each

5. Explain the need for treatment verification and what techniques are available for this

6. Discuss the limitations of each verification type and the process behind choosing an appropriate verification method

7. Describe a brachytherapy treatment program (including LDR and HDR) and the differences in dosimetry between brachytherapy and external beam therapy

8. Understand the future vision of radiation therapy with respect to new technology, treatment techniques and the steps needed to implement these


This course will include the following items: 1. Imaging for radiation therapy treatment planning a. CT (including 4DCT) b. MRI (why we can’t use this for planning – what situations when we can) c. PET (image registration/fusion) d. Ultrasound (Clarity)

2. Treatment planning systems a. Treatment planning algorithms and their limitations b. Inverse planning optimisation (simulated annealing and cost functions) c. IMRT (fluence maps, optimisation sequence, leaf sequences, leaf constraints, interleaf leakage – when does it really matter? – limitations) d. IMRT vs VMAT

3. Dosimetry a. Linac calibration and commissioning b. Where does the data go? Why is it important? c. Relative vs absolute d. Daily, monthly, annual QA

4. Electrons a. Scatter considerations b. Surface dose, characteristics of depth dose, energy spectrum, field size dependence, dose across field, penumbra, c. Obliquity, junctioning (matching with photons/electrons)

5. Imaging for radiation therapy treatment verification a. Imaging techniques (EPI, CBCT, MVCT, ExacTrac) b. Portal dosimetry c. Gated treatment/motion detection during treatment d. In vivo verification

6. Brachytherapy a. LDR/PDR/HDR b. Common sources c. interstitial/intracavitary/intraluminal and surface (permanent/temporary) d. Common treatment sites/techniques e. Imaging for brachy (IGBT)

7. Other techniques/technology a. Tomo b. Stereo c. TBI/TBE d. Gamma knife

8. Dosimetry & Dose Verification a. Equipment b. Verification methods c. Treatment Dosimetry

9. Radiation Protection in RT a. Radiation Units b. Dose Limits c. Sheilding d. Monitoring Equipment  


This course is only available to students enrolled in either the B MRS (Radiation Therapy) (11018) or B MRS (Honours) (Radiation Therapy) (40010) program and have successfully completed PHYS1250.

Assumed Knowledge

MRSC2501: MRS Instrumentation IIA

Assessment Items

In Term Test: Exam - In class

Written Assignment: Written Assignment

In Term Test: Exam - In class 2

Contact Hours



Face to Face On Campus 4 hour(s) per Week for Full Term


Face to Face On Campus 1 hour(s) per Week for 1 Weeks starting in week 4

Tutorial is an optional attendance for students requiring additional support.