US 6,471,389 B2 · Dynamic delay curve generator for ultrasonic imaging system

Abstract

A dynamic delay curve generation method for an ultrasonic imaging system having the following steps: (1) obtaining three initial values of K0, N0 and φ1 from a parameter decoder, where K0 is the initial delay weighted parameter, N0 is the initial delay cycle number and φ 1 = 1 - x 2 ⁢ cos 2 ⁢ θ N 0 ⁢ V 2 ⁢ T R ⁢ Δ ⁢ ⁢ t 0 ; (2) defining A=N0+φ1, B=1+N0, C=φ1, D=0, E=0, K=K0; (3) executing B=B+1, D=B+E, E=C+2; (4) determining if A≦0, and if A≦0 is false, execute step (5), but if A≦0 is true, execute step (6); (5) executing A=A+C and then executing step (3) again; and (6) executing A=A+D, C=C+1 and at the same time executing K=K+1, where the delay weighted parameter K is used for controlling the delay of response signal received by each transducer element, and finally executing step (3) again.

Claims7

Dependent claims

A dynamic delay curve generation method for an ultrasonic imaging system that includes a transducer array having a plurality of transducer elements with each transducer element corresponding to a position x, wherein the angle between a line joining a beam reflection point to the center of the transducer array and the vertical centerline of the transducer array is defined as θ, the sampling cycle is defined as TR, the fine resolution cycle is defined as Δt0, and beam speed is defined as V, and that the ultrasonic imaging system also includes a parameter decoder, comprising the steps of:

(1) obtaining three initial values of K0, N0 and φ1 from the parameter decoder, where K0 is the initial delay weighted parameter, N0 is the initial delay cycle number and φ 1 = 1 - x 2 ⁢ cos 2 ⁢ θ N 0 ⁢ V 2 ⁢ T R ⁢ Δ ⁢ ⁢ t 0
(2) defining A=N0+φ1, B=1+N0, C=φ1, D=0, E=0, K=K0;
(3) executing B=B+1, D=B+E, E=C+2;
(4) determining if A≦0, and if A≦0 is false, executing step (5), on the contrary, if A≦0 is true, executing step (6);
(5) executing A=A+C and then executing step (3) again;
and
(6) executing A=A+D, C=C+1 and at the same time executing K=K+1, where the delay weighted parameter K is used for controlling the delay of response signal received by each transducer element, finally executing step (3) again.

4 more elements

A dynamic delay curve generator for an ultrasonic imaging system that includes a transducer array having a plurality of transducer elements with each transducer element corresponding to a position x, wherein the angle between a line joining a beam reflection point to the center of the transducer array and the vertical centerline of the transducer array is defined as θ, the sampling cycle is definedas TR, the fine resolution cycle is defined Δt0, and beam speed is defined as V, and that the ultrasonic imaging system also includes a parameter decoder for providing three initial values of K0, N0 and φ1, where K0 is the initial delay weighted parameter, N0 is the initial delay cycle number and φ 1 = 1 - x 2 ⁢ cos 2 ⁢ θ N 0 ⁢ V 2 ⁢ T R ⁢ Δ ⁢ ⁢ t 0 ,

comprising:
a first logic circuit receiving the three initial parameters K0, N0 and φ1 from the parameter decoder for carrying out computations including A=N0+φ1, B=1+N0, C=φ1, D=0, E=0, K=K0, and then outputs a first enable control signal;
a memory circuit for holding the variables A,B,C,D,E and K;
a second logic circuit for receiving the first enable control signal and executing computations including B=B+1, D=B+E and E=C+2, storing the newly obtained results in the memory circuit and then issuing a second enable control signal;
a decision circuit for receiving the second enable control signal and checking if the value of A stored in memory circuit is smaller than or equal to zero, if A≦0 is false, a third enable control signal is issued, but if A≦0 is true, a fourth enable control signal is issued;
a third logic circuit for receiving the third enable control signal and then executing the computation A=A+C, storing the newly obtained results in the memory circuit and then issuing a fifth enable control signal to the second logic circuit so that the second logic circuit can compute B=B+1, D=B+E and E=C+2 and output the second enable control signal again;
a fourth logic circuit for receiving the fourth enable control signal and executing computations A=A+D and C=C+1, storing the newly obtained results in the memory circuit and then issuing a sixth enable control signal to the second logic circuit so that the second logic circuit can compute B=B+1, D=B+E and E=C+2 and output the second enable control signal again;
and
a fifth logic circuit for receiving the fourth enable logic signal and executing the computation K=K+1, and storing the newly obtained results of the computation to memory circuit, wherein the variable K is used for controlling the delay of the response signal received by a corresponding transducer element.

6 more elements

Dependencies are inferred from the claim text.

Dynamic delay curve generator for ultrasonic imaging system

Life of this patent

Dynamic delay curve generator for ultrasonic imaging system

Life of this patent

Abstract

Claims7