a) Half-life of Ir-192 is: (i) 5.26 years (ii) 30 years (iii) 17 days (iv) none of these b) The total dose prescribed in stereotactic irradiation are of the order of: (i) 100 - 150... a) Half-life of Ir-192 is: (i) 5.26 years (ii) 30 years (iii) 17 days (iv) none of these b) The total dose prescribed in stereotactic irradiation are of the order of: (i) 100 - 150 Gy (ii) 10 - 50 Gy (iii) 20 - 30 Gy (iv) none of these c) Half-life of Pd-103 is: (i) 59 days (ii) 17 days (iii) 30 years (iv) 14 days d) Average gamma energy of Ra-226 is: (i) 1.25 MeV (ii) 0.662 MeV (iii) 0.38 MeV (iv) none of these e) The 3D geometric shape of the tumour is considered in the case of: (i) IMRT (ii) 3D CRT (iii) electron beam (iv) photon beam f) Gamma energy of Cs-137 is: (i) 1.25 MeV (ii) 0.38 MeV (iii) 0.662 MeV (iv) none of these g) The radiation treatment technique in which the intensity of incident radiation changes is known as: (i) IGR (ii) MRT years (iii) 3D CRT days (iv) none of these ... etc.
Understand the Problem
The question is asking for specific knowledge related to radioactive isotopes, their half-lives, gamma energies, and radiation treatment techniques. It presents multiple-choice questions based on these concepts, implying a focus on radiotherapy or nuclear medicine.
Answer
a) Half-life of Ir-192 is: (iii) 73.81 days b) The total dose prescribed in stereotactic irradiation are of the order of (iii) 20 - 30 Gy c) Half-life of Pd-103 is: (ii) 17 days d) Average gamma energy of Ra-226 is: (iv) none of these e) The 3D geometric shape of the tumour is considered in the case of: (ii) 3D CRT f) Gamma energy of Cs-137 is: (iii) 0.662 MeV g) The radiation treatment technique in which the intensity of incident radiation changes is known as: (i) IMRT
Answer for screen readers
More Information
Stereotactic irradiation doses can vary but typically range from 20 to 30 Gy. Gamma energies differ based on the isotope.
Tips
The half-lives and energies of radioisotopes are commonly confused, so double-check against reliable sources.
Sources
- Physical and Dosimetric Aspects of the Iridium-Knife - PMC - pmc.ncbi.nlm.nih.gov
- [PDF] 2019 ASTRO RADIATION AND CANCER BIOLOGY STUDY GUIDE - astro.org
AI-generated content may contain errors. Please verify critical information
Thank you for voting!
