RADIATION PROTECTION IN RADIOTHERAPY Part No...., Module No....Lesson No Module title IAEA Training Material on Radiation Protection in Radiotherapy RADIATION PROTECTION IN RADIOTHERAPY Part 2: Radiation Physics PRACTICAL EXERCISE IAEA Post Graduate Educational Course in Radiation Protection and Safe Use of Radiation Sources

Part No...., Module No....Lesson No Module title Objectives To be familiar with different types of ionizing radiation To understand the most important interaction processes between radiation and matter To be able to use and understand all basic radiation quantities To have a basic understanding of the means of radiation detection Part 2, Practical 1 IAEA Post Graduate Educational Course in Radiation Protection and Safe Use of Radiation Sources

Part 2: Radiation Physics Part No...., Module No....Lesson No Module title IAEA Training Material on Radiation Protection in Radiotherapy Part 2: Radiation Physics Practical 1: Inverse square law IAEA Post Graduate Educational Course in Radiation Protection and Safe Use of Radiation Sources

Part No...., Module No....Lesson No Module title Contents + Objective Learn about the importance of distance as a means to reduce radiation exposure Perform an experiment to demonstrate this Part 2, Practical 1 IAEA Post Graduate Educational Course in Radiation Protection and Safe Use of Radiation Sources

What Minimum Equipment is Needed? Part No...., Module No....Lesson No Module title What Minimum Equipment is Needed? Radiation source Radiation detector Tape distance measure Graph paper Part 2, Practical 1 IAEA Post Graduate Educational Course in Radiation Protection and Safe Use of Radiation Sources

Part No...., Module No....Lesson No Module title Radiation source Ideal a 60-Co source for teaching (activity <100kBq) Should be high energy gamma to minimize attenuation Some experiments can also be performed with brachytherapy source Part 2, Practical 1 IAEA Post Graduate Educational Course in Radiation Protection and Safe Use of Radiation Sources

Part No...., Module No....Lesson No Module title Radiation detector Best a Geiger counter with window thick enough to be mostly sensitive to gamma radiation A survey meter may also be suitable Part 2, Practical 1 IAEA Post Graduate Educational Course in Radiation Protection and Safe Use of Radiation Sources

Record readings at different distances Part No...., Module No....Lesson No Module title Record readings at different distances detector source distance Part 2, Practical 1 IAEA Post Graduate Educational Course in Radiation Protection and Safe Use of Radiation Sources

Part No...., Module No....Lesson No Module title Record and plot data Part 2, Practical 1 IAEA Post Graduate Educational Course in Radiation Protection and Safe Use of Radiation Sources

Important consequences Part No...., Module No....Lesson No Module title Important consequences Distance is a powerful way to reduce exposure Practical implications in radiotherapy: use long tweezers to handle sources in brachytherapy a long maze can reduce shielding requirements for doors significantly Part 2, Practical 1 IAEA Post Graduate Educational Course in Radiation Protection and Safe Use of Radiation Sources

Part No...., Module No....Lesson No Module title Acknowledgement Photos from Leybold-Didaktik web page: www.leybold.de Part 2, Practical 1 IAEA Post Graduate Educational Course in Radiation Protection and Safe Use of Radiation Sources

Part No...., Module No....Lesson No Module title Questions? Let’s get started... Part 2, Practical 1 IAEA Post Graduate Educational Course in Radiation Protection and Safe Use of Radiation Sources