Choose and write the correct answer: (a) Which of the treatment sites is treated with permanent implant? (b) Which of the following source is used in permanent implant? (c) Which o... Choose and write the correct answer: (a) Which of the treatment sites is treated with permanent implant? (b) Which of the following source is used in permanent implant? (c) Which of the following source is used in HDR unit? (d) The ideal energy for a brachytherapy source is? (e) The average gamma energy of Co-60 is? (f) Half-life Ir-192 is? (g) Half-life of Pd-103 is? (h) Which of the following source is not used presently in brachytherapy? (i) The unit of exposure rate constant in brachytherapy is? (j) Average gamma energy for I-125 is? (k) The unit of exposure rate constant in teletherapy is? (l) Half-life of Au-198 is?
Understand the Problem
The question involves multiple choice items related to topics in radiation therapy, specifically regarding brachytherapy and teletherapy, including the appropriate sources, energies, and constants. It asks for the correct answers to various statements.
Answer
(a) Uterus, (b) Cs-137, (c) Ir-192, (d) 0.2-0.4 MeV, (e) 1.25 MeV, (f) 74 days, (g) 17 days, (h) Ra-226, (i) Rcm²/Ci h, (j) 0.028 MeV, (k) R m²/Ci h, (l) 2.7 days
["(a) Uterus","(b) Cs-137","(c) Ir-192","(d) 0.2-0.4 MeV","(e) 1.25 MeV","(f) 74 days","(g) 17 days","(h) Ra-226","(i) Rcm\u00b2/Ci h","(j) 0.028 MeV","(k) R m\u00b2/Ci h","(l) 2.7 days"]
Answer for screen readers
["(a) Uterus","(b) Cs-137","(c) Ir-192","(d) 0.2-0.4 MeV","(e) 1.25 MeV","(f) 74 days","(g) 17 days","(h) Ra-226","(i) Rcm\u00b2/Ci h","(j) 0.028 MeV","(k) R m\u00b2/Ci h","(l) 2.7 days"]
More Information
Brachytherapy involves placing radioactive material close to the area requiring treatment. Different isotopes serve specific purposes depending on their properties such as half-life and energy. The uterus frequently uses permanent implants with isotopes like Cs-137 due to its localized treatment benefits.
Tips
A common mistake is confusing isotopes used in different types of brachytherapy, such as HDR versus permanent implants. Always check specific isotope properties to ensure correct application.
Sources
- Chapter 13: Brachytherapy: Physical and Clinical Aspects - international.anl.gov
- Comparison of 60Co and 192Ir sources in HDR brachytherapy - PMC - pmc.ncbi.nlm.nih.gov
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