Quantum of Radiation advocated at point B in carcinoma cervix?
Ans- C 5000 rads a. External beam via cobalt or linear accelerator & brachytherapy (e.g. Radium, cobalt or cesium) is used in the treatment of carcinoma cervix. b. The radium dosage is calculated with respect to the amount of irradiation received at 2 theoretical points a & b. c. Point A lies 2cm above & 2cm lateral to the base of the radium tube in the cervical canal. It approximates to the position in the pelvis where the uterine artery & ureter cross. d. Point B lies 3cm lateral to point a & roughly corresponds to the position of obturator nodes. e. 8000 rads is the dosage given to point A in cancer cervix. f. The Manchester method of radiotherapy for a ca cervix is a variation of the Stockholm technique & uses rubber avoids loaded with radium in a plate of the platinum boxes for the vaginal vault.
1000 cGy
2000 cGy
5000 cGy
8000 cGy