An apparatus for thermal therapy in a patient, comprising: an elongated cylindrical portion having a first end thereof sized and configured for insertion into a male urethra; an array of ultrasonic sources disposed within said elongated cylindrical portion and substantially arranged along an axis of said elongated cylindrical portion proximal to said first end of the elongated cylindrical portion, the ultrasonic sources being electrically driven to provide thermal therapy in said patient; a transition portion directly connected to a second end of said elongated cylindrical portion, said transition portion having a flared or bulbous shape that limits a depth of said insertion into said male urethra; an elongated printed circuit board disposed in said elongated cylindrical portion and extending from said first end to a second end of said elongated cylindrical portion, said circuit board including a plurality of printed circuit lines respectively coupled to a plurality of said ultrasonic sources of said array, said printed circuit lines providing power and control signals to said respective plurality of ultrasonic sources and driving said sources to deliver acoustic emissions of respective frequency and power depending on the respective power and control signals, said plurality of printed circuit lines on said circuit board_being coupled to said plurality of ultrasonic sources of said array by way of respective epoxy points or pads of finite thickness so as to cause a gas-filled separation between back sides of said ultrasonic sources and said circuit board so as to cause an outward radiation of ultrasonic energy from an outward face of said ultrasonic sources; a rotational mechanical coupling proximal to a second end of said elongated cylindrical portion, said rotational mechanical coupling designed and arranged to permit mechanical rotation of said elongated cylindrical portion about said axis thereof; and at least one fluid conduit running through said rotational mechanical coupling permitting a fluid to circulate into and then out of said apparatus by flowing from said second end towards said first end of the elongated cylindrical portion and back again. an elongated cylindrical portion having a first end thereof sized and configured for insertion into a male urethra; an array of ultrasonic sources disposed within said elongated cylindrical portion and substantially arranged along an axis of said elongated cylindrical portion proximal to said first end of the elongated cylindrical portion, the ultrasonic sources being electrically driven to provide thermal therapy in said patient; a transition portion directly connected to a second end of said elongated cylindrical portion, said transition portion having a flared or bulbous shape that limits a depth of said insertion into said male urethra; an elongated printed circuit board disposed in said elongated cylindrical portion and extending from said first end to a second end of said elongated cylindrical portion, said circuit board including a plurality of printed circuit lines respectively coupled to a plurality of said ultrasonic sources of said array, said printed circuit lines providing power and control signals to said respective plurality of ultrasonic sources and driving said sources to deliver acoustic emissions of respective frequency and power depending on the respective power and control signals, said plurality of printed circuit lines on said circuit board_being coupled to said plurality of ultrasonic sources of said array by way of respective epoxy points or pads of finite thickness so as to cause a gas-filled separation between back sides of said ultrasonic sources and said circuit board so as to cause an outward radiation of ultrasonic energy from an outward face of said ultrasonic sources; a rotational mechanical coupling proximal to a second end of said elongated cylindrical portion, said rotational mechanical coupling designed and arranged to permit mechanical rotation of said elongated cylindrical portion about said axis thereof; and at least one fluid conduit running through said rotational mechanical coupling permitting a fluid to circulate into and then out of said apparatus by flowing from said second end towards said first end of the elongated cylindrical portion and back again.