1. Choose and write the correct answer: (a) Gamma energy of an ideal brachytherapy source is - (i) 0.2 to 0.4 MeV (ii) 2 to 4 MeV (iii) 1.25 MeV (iv) none of these (b) Average gamm... 1. Choose and write the correct answer: (a) Gamma energy of an ideal brachytherapy source is - (i) 0.2 to 0.4 MeV (ii) 2 to 4 MeV (iii) 1.25 MeV (iv) none of these (b) Average gamma energy of Cobalt-60 is - (i) 0.662 MeV (ii) 0.412 MeV (iii) 1.25 MeV (iv) 0.38 MeV (c) Half-life of Au-198 is - (i) 2.7 days (ii) 59 days (iii) 74 days (iv) 17 days (d) Average gamma energy of Cs-137 is - (i) 1.25 MeV (ii) 0.662 MeV (iii) 0.38 MeV (iv) 0.412 MeV (e) Half-life of Pd-103 is - (i) 59 days (ii) 17 days (iii) 27 days (iv) 74 days (f) Average gamma energy of I-125 is - (i) 0.021 MeV (ii) 0.38 MeV (iii) 1.25 MeV (iv) 0.412 MeV (g) Average gamma energy of Ra-226 is - (i) 0.83 MeV (ii) 1.25 MeV (iii) 0.38 MeV (iv) 0.412 MeV (h) Half-life of Ir-192 is - (i) 17 days (ii) 74 days (iii) 17 days (iv) 59 days (i) Average gamma energy of Ir-192 is - (i) 1.25 MeV (ii) 0.38 MeV (iii) 0.662 MeV (iv) 0.412 MeV (j) IMRT delivers - (i) uniform beam intensity (ii) non-uniform beam intensity (iii) orthogonal intensity (iv) none of these (k) Inverse planning is used for - (i) treatment contouring (ii) treatment planning (iii) both of these (iv) none of these (l) SFD of Gamma knife - (i) 40 cm (ii) 30 cm (iii) 20 cm (iv) 10 cm (m) In SRS total dose is delivered in - Read more