Korea Research Institute of Standards and Science

Nexvivo Co., Ltd.

Il Doh

Yong Kim

Kyung Min Baik

Young-Ho Cho

Yong-tae Kim

Bong Young Ahn

Se Hwa Kim

Sang Won Lee

Kyung-min Baik

Wuon-Shick Kim

Se-hwa Kim

Jae-yub Hyun

Hyunji Lee

Sung Mok Kim

Hwan-Il Yoo

Bong-young Ahn

Hyung Jin Lee

The present invention relates to a flat-plate focusing ultrasonic transducer and an acoustic lens composed of an annular array piezoelectric element and methods of manufacturing and designing thereof, more particularly to a flat-plate focusing ultrasonic transducer composed of an annular array piezoelectric element, wherein the annular array piezoelectric element has a plurality of concentric regions which is concentrically arranged in a concentric circle shape with respect to a center point, the concentric region has ring shaped sound insulation regions and piezoelectric regions which are alternatively formed in a direction from the center point to a radius direction, so as to focus a sound wave near a focal point, wherein the piezoelectric regions are composed of a piezoelectric ring that is composed of a piezoelectric material and thus excites a sound wave, the concentric region is in a shape of a flat-plate of which both sides are flat and which has a constant thickness, and each radius of the plurality of the sound insulation regions and the piezoelectric regions in the concentric region are calculated based on a set focal length of the ultrasonic transducer and a frequency of a set sound wave.

Flat-plate focusing ultrasonic transducer and acoustic lens which are composed of annular array piezoelectric element, and methods of manufacturing and designing thereof

The present invention relates to an eye phantom for evaluating a retinal angiography image, and a manufacturing method therefor. A purpose of the present invention is to provide an eye phantom for evaluating a retinal angiography image, capable of simulating even the vascular structure and blood flow of a retina so as to be more similar to an actual retinal structure than a conventional eye phantom; and a manufacturing method therefor. More specifically, a purpose of the present invention is to provide an eye phantom for evaluating a retinal angiography image, including various shapes of fine fluid channel structures corresponding to the vascular structure formed in an actual retina; and a manufacturing method therefor.

Eye phantom for evaluating retinal angiography image

The present invention relates to an ultra-thin acoustic lens for subwavelength focusing in a megasonic range and a design method thereof. More particularly, the present invention relates to a super-oscillatory planar ultra-thin acoustic lens for subwavelength focusing in the megasonic range, which includes a plurality of concentric regions arranged in a concentric shape with reference to the center point, wherein the concentric regions include a plurality acoustic insulation region for insulating incident acoustic waves, and a plurality of transmission regions for transmitting acoustic waves, the acoustic insulation regions and the transmission regions being formed alternatively in a radial direction from the center point so as to focus incident acoustic wave energy onto a subwavelength region. The acoustic lens has flat surfaces on both sides thereof respectively and has a plate shape having a constant thickness, and a layout, which is a radius of each of the plurality of acoustic insulation regions and transmission regions in the concentric region, is determined by a topology optimization reverse design method.

Ultra-thin acoustic lens for subwavelength focusing in megasonic range, and design method therefor

A particle processing device includes a chamber and at least one capturing structure. The chamber is connected to a first port and a second port to provide a space between the first and second ports for flowing of a fluid having a particle. The capturing structure is provided in the chamber to form a fluidic channel, wherein the fluidic channel has a first opening and a second opening and a capturing region is formed between the first and second openings such that the capturing region has a changeable sectional shape for capturing the particle in the fluid flowing from the first port to the second port.

Selective particle capture and collection device

A phantom for measuring thickness of a thin layer and a method of using thereof. The phantom may include a non-scattering muscle mimicking material having a flat top surface; a plurality of soft tissue mimicking thin layers placed in a first area, which is at least a part of a top surface of the non-scattering muscle mimicking material, and having thicknesses different from each other; and an anechoic blood mimicking liquid material placed in an area other than the first area among an entire area of the top surface of the non-scattering muscle mimicking material and on a top surface of the plurality of soft tissue mimicking thin layers.

Phantom for measuring thickness of thin layer using ultrasonic imaging device and method of using thereof

The present disclosure relates to an acoustic lens using a Fresnel zone plate, a design method and a manufacturing method of the acoustic lens, a focusing ultrasonic transducer to which the acoustic lens is applied, and a manufacturing method of the focusing ultrasonic transducer. More specifically, an acoustic lens using a Fresnel zone plate which is applied to a focusing ultrasonic transducer. The acoustic lens includes a plurality of concentric regions which is concentrically disposed with respect to a center point. In the concentric region, a sound insulation region which blocks an entering sound wave and a transmission region which transmits the sound wave are alternately formed in a radial direction from the center point, and the entering sound wave is focused near a focal point.

Focusing ultrasonic transducer to which acoustic lens using Fresnel zone plate is applied and method for manufacturing focusing ultrasonic transducer

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Daejeon, South Korea

Il Doh