Abstract: A prostate gland location and stabilization device comprising an elongate cylinder, sized to fit in the anal canal of a user, and having either a narrowing, or a bend (in the range from 20 to 60 degrees) located at or towards the axial mid-region of the cylinder. The cylinder has a heterogeneous internal structure arranged to define landmarks detectable by X-ray or magnetic resonance imaging. Additional features include an essentially flat handle, an internal gas channel and contrast markers. In some variants of the device, the heterogeneous structure comprises air-filled pockets. The invention also provides a method of locating the prostate gland of a patient using the device.