Starting this issue, SCMPR Newsletter will carry a new column – SOLVE IT! – featuring a relatively difficult question / interesting problem for the young medical physics students and young medical physicists to solve. Those who are interested can send their answers to sptgnadar@gmail.com . The best answer would get published in the next issue of the Newsletter along with the name and affiliation of the contributor.
A patient has to be treated by direct 6MV posterior spinal field of size 6 cm(width) x 48 cm(length) at an extended SSD of 120 cm.The prescribed dose is 1.8 Gy at a depth of 5.5 cm.
A Data( output at max for 100 cm SSD, TMR) are given in the tables below.Using ONLY The data given the tables, find out the treatment MUs.

Note: For equivalent square field, use the formula: Side of the square = 4*(area/perimeter)