Patent ID: 7204796

Claim:
A device comprising: a catheter for introduction into a body having a body part a portion of which is in an immediate vicinity of a tumor to be irradiated, the catheter including: at least one expandable portion enabled to expand within an interior of the body to minimize a movement of the body part; and at least one sensor unit fixedly disposed within the at least one expandable portion, the at least one sensor unit to provide a position signal indicative of a current position of the at least one sensor unit, the at least one expandable portion being positioned within the body so that in an expanded state, the at least one sensor unit is positioned adjacent to the portion of the body part that is in the immediate vicinity of the tumor; a receiver unit, positioned outside the body, to receive the position signal provided by the sensor unit and to determine whether the at least one sensor unit has exhibited a movement based on the position signal; and a conformal radiation unit, positioned outside the body, to adapt a shape of a radiation field if the receiver unit determines that the at least one sensor unit has exhibited a movement.