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Focused ultrosound therapy combined array element phased array and multifocal shear wave imaging system

A phased array, multi-focus technology, applied in the field of biomedical instruments, can solve limited and other problems

Inactive Publication Date: 2010-04-07
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the focus scanning area of ​​the transducer aligned with the center of the conventional array element is limited.

Method used

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  • Focused ultrosound therapy combined array element phased array and multifocal shear wave imaging system
  • Focused ultrosound therapy combined array element phased array and multifocal shear wave imaging system
  • Focused ultrosound therapy combined array element phased array and multifocal shear wave imaging system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] for figure 2 The spherical 1284-combined array element phased array of the present invention, in the figure 1 When the driving number of 128 channels, the outer diameter of the transducer, the radius of curvature and the frequency are exactly the same: the grating-lobe-free area of ​​the single-focus 3-dimensional scanning is radial: 18mm, axial: 40mm, and the grating-lobe-free focal scanning area Volume: 18×18×40mm 3 , Figure 5 Shows the sound intensity distribution diagram of the 1284-combined spherical phased array at the extreme position focus (0, 9, 125) mm, the focus size is 1.75×1.75×18mm 3 .

[0036] Thus the conclusion obtained is: 128 4-combined matrix 3 ( figure 2 ) can be obtained better than the regular matrix ( figure 1 ) expands the volume of the grating-lobe-free focus scanning area by about 10 times.

Embodiment 2

[0038] for image 3 The spherical surface 128 9-combination element phased array of the present invention, in the figure 1 When the driving number of 128 channels, the outer diameter of the transducer, the radius of curvature and the frequency are exactly the same: the grating-lobe-free area of ​​the single-focus 3-dimensional scanning is radial: 18mm, axial: 40mm, and the grating-lobe-free focal scanning area Volume: 18×18×40mm 3 , Figure 6 Shows the sound intensity distribution diagram of the 1289-combined spherical phased array at the extreme position focus (0, 9, 125) mm, the focus size is 1.75×1.75×18mm 3 , The focus peak is slightly higher than the 128 4-combination array.

[0039] Thus the conclusion obtained is: 128 9-combined matrix 3 ( image 3 ) can also be obtained than the regular matrix ( figure 1 ) expands the volume of the grating-lobe-free focus scanning area by about 10 times.

[0040] Although the 128 4-combination array and the 128 9-combination arra...

Embodiment 3

[0042] Since the combined array can expand the focus scanning area, the distance between the focal points can be arranged in the multi-focus mode to be larger (compared with the conventional array). Figure 7 shows 128 4-combined arrays ( figure 2 ) multi-focus sound intensity distribution and conventional array ( figure 1 ) contrast; the advantage of phased array is that it can be multi-focus at the same time, in Figure 7 The acoustic intensity distribution diagram of the conformal multifocal “C”-shaped focal pattern is shown in , which can be used to bypass important nerves or blood vessels for efficient conformal treatment during surgery. Figure 7 (a) and (b) are regular matrices ( figure 1 ) The sound intensity distribution of the "C"-shaped focal mode of 5 focal points, the 5 focal points are distributed on a circle with a smaller radius R=2.7mm; Figure 7 (c) and (d) are 128 4-combined arrays ( figure 2 ) The sound intensity distribution of the "C"-shaped focal m...

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Abstract

The invention relates to a focused ultrosound therapy combined array element phased array and multifocal shear wave imaging system for focused ultrosound non-invasive surgical therapy, belonging to the technical field of biomedical instrument, in particular to a combined array element phased array transducer used for multifocal focused ultrosound therapy and radial force excitation imaging and also relates to a multifocal plane shear wave imaging system by using the combined array element phased array transducer. In the transducer, the combined array element is formed by compactly placing 2*2 or 3*3 basic matrix array elements in rows according to spherical rectangle mode, all basic matrix array elements in each combined array element are in parallel electrically and share one power driven channel; a basic matrix array element distance is left between the centers of two adjacent combined array elements along at least one direction, and each combined array element is matched with the phase and amplitude of one power driven channel so as to significantly expand the focal scanning area.

Description

technical field [0001] The invention belongs to the technical field of biomedical instruments, and relates to equipment for focused ultrasound non-invasive surgical treatment, in particular to a combined array element phased array transducer, which is applied to multi-focus focused ultrasound treatment and radiation force imaging excitation; And a multi-focus planar shear wave imaging system using the combined array element phased array transducer. Background technique [0002] Focused ultrasound surgery (FUS) is a treatment method that focuses ultrasonic energy on deep target tissues in the human body to precisely select thermally damaged target tissues without harming adjacent normal tissues. It is currently mainly used in the non-invasive treatment of tumors treat. Focused ultrasound surgery belongs to the high-energy treatment of therapeutic ultrasound (Therapeutic ultrasound), and the treatment of lower energy in therapeutic ultrasound, such as focusing on bone repair,...

Claims

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Application Information

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IPC IPC(8): A61B18/04
Inventor 陆明珠万明习
Owner XI AN JIAOTONG UNIV
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