Patent ID: 8123705

Claim:
A mechanism for varying a profile of an elongated rectal probe having a sensor, comprising: an expandable portion; a plurality of lever arms pivotally mounted to the rectal probe adjacent the expandable portion, the sensor protruding through a rigid sensor panel and mounted to a portion of the rectal probe separate from the expandable portion at a fixed radial distance from a longitudinal axis defined by the elongated rectal probe; and a linkage shaft attached to the plurality of lever arms for moving the arms from a first position in which the expandable portion is relaxed and a second position in which the expandable portion is extended, the sensor being at the fixed radial distance when the expandable portion is relaxed and when the expandable portion is extended, the rigid sensor panel mounted to the elongated rectal probe by a shoulder configured to raise the profile of the sensor panel with respect to the elongated rectal probe to press the sensor against a wall of an organ when the expandable portion is extended within a body of a patient.