Patent ID: 7346144

Claim:
A system for delivering radiation to an object, the system comprising: a radiation source to generate an output beam directed to an object; a multi-leaf collimator mounted between the radiation source and the object, the multi-leaf collimator to define a first predetermined irradiation field of the object; a control unit configured to control the radiation source and the multi-leaf collimator; a first radiation detector array comprising a first matrix of ion chambers to measure a radiation dosage delivered to each ion chamber of the first matrix and to instruct the control unit to turn the output beam off; and a second detector array comprising a second matrix of ion chambers to measure a radiation dosage delivered to the first predetermined irradiation field, and configured to communicate to the first radiation detector array to turn the output beam off, wherein, in response to the communication to turn the output beam off, the control unit is configured to control the multi-leaf collimator to be repositioned to define a second predetermined irradiation field of the object and the control unit is configured to control the radiation source to generate an output beam directed to the second predetermined irradiation field.