24.4b Ex1 SP22 P42 Q11 PET Scan Positrons | A2 Medical Physics | Cambridge A Level 9702 Physics

Example 1 - 9702/4/S/P/22: (a) Positron emission tomography (PET scanning) makes use of a tracer containing a radioactive material that decays by positron emission. #9702sp22p4 #Lv2 #A2petScanP4 (i) State what is meant by a tracer. (ii) State the name of the particles that are emitted from the body and detected by the detectors during PET scanning. (b) Explain how the particles in (a)(ii) are created from positrons. (c) Positrons can be artificially created by a process in the laboratory that is the reverse of the process in (b). This process creates both a positron and an electron moving at the same speed in opposite directions. Suggest why two of the particles in (a)(ii) are needed to create one positron. #A2MedicalPhysics Applications Playlist:    • Ch24 Medical Physics | CAIE 9702 A2 Physics   Instagram Pocket Guide (  / etphysics  ) More Resources (https://9702-physics.blogspot.com/) Support us! (  / etphysics  ) Tuition/Tutoring inquiries: Email: [email protected] Whatsapp: https://wa.me/60126679171 9702_4_sp22