A - Human Necessities – 61 – B
Patent
A - Human Necessities
61
B
349/36
A61B 8/00 (2006.01) G01S 15/89 (2006.01) G10K 11/28 (2006.01)
Patent
CA 1193353
ABSTRACT An ultrasonic imaging device includes a transducer assembly for transmitting ultrasound pulses into a portion of a structure to be imaged and receiving ultrasound scattered by said structure portion and generating signals in response thereto, means to energize said transducer assembly to trans- mit said pulses, scanning means for progressively relating said transducer assembly to successive portions of said structure according to a scanning pattern, and receiver and signal processing means for assembling an image from said generated signals, the transducer assembly comprising separate transmitting and receiving transducers, one of said transducers being a simulated conical transducer having a line focus, and the other of said transducers having its axis in parallel alignment with said line focus, the scan- ning means being operative to move said line focus in rela- tion to a structure to be imaged in accordance with said scanning pattern. The simulated conical transducer includes a transducer element and an associated acoustic reflector system such that an active surface of the transducer element is perceived at said line focus as a conical transducer having a surface of much larger area than said active sur- face and having a half angle such that rays converse on said line focus at a predetermined angle of at least 20° to the latter. The transducer element may have a cylindrical active surface associated with a single conical reflector, a planar active surface associated with two conical reflectors.
428835
Hunt John W.
Patterson Michael S.
Ontario Cancer Institute (the)
Ridout & Maybee Llp
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