Dosimetry method for use in treatment of brain tumor, involves determining changes in threshold value of cells which are exposed to ionizing radiation by correlating address of cell to corresponding position in two-dimensional array

NOVELTY - The threshold value written cells of flash memory (12) are exposed to ionizing radiation and the state of the cells are read to calculate the absorbed dose. Address of each memory cell is correlated to corresponding position in a two-dimensional array and the changes in the threshold value of cells are determined. USE - Dosimetry method for use in treatment of brain tumor. Can also be used for security systems, sterilization application, high energy physics, space applications and medical applications. ADVANTAGE - Since changes in threshold value of cells which are exposed to ionizing radiation are determined by correlating address of each cell to corresponding position in two-dimensional array, ensures possibility of delivering very high dose to tumor without destroying the surrounding tissue. Thus the spatial resolution of the dosimeter is improved.