WO2023017891A1 - 광음향 및 초음파 이미징 장치 및 이미지 형성 방법 - Google Patents
광음향 및 초음파 이미징 장치 및 이미지 형성 방법 Download PDFInfo
- Publication number
- WO2023017891A1 WO2023017891A1 PCT/KR2021/011871 KR2021011871W WO2023017891A1 WO 2023017891 A1 WO2023017891 A1 WO 2023017891A1 KR 2021011871 W KR2021011871 W KR 2021011871W WO 2023017891 A1 WO2023017891 A1 WO 2023017891A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- target
- image
- ultrasonic
- optoacoustic
- ultrasound
- Prior art date
Links
- 238000003384 imaging method Methods 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims description 32
- 239000000523 sample Substances 0.000 claims abstract description 34
- 238000002604 ultrasonography Methods 0.000 claims description 73
- 210000004204 blood vessel Anatomy 0.000 claims description 39
- 210000001519 tissue Anatomy 0.000 claims description 27
- 102000001554 Hemoglobins Human genes 0.000 claims description 22
- 108010054147 Hemoglobins Proteins 0.000 claims description 22
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 16
- 229910052760 oxygen Inorganic materials 0.000 claims description 16
- 239000001301 oxygen Substances 0.000 claims description 16
- 210000000988 bone and bone Anatomy 0.000 claims description 12
- 230000001678 irradiating effect Effects 0.000 claims description 12
- 238000007689 inspection Methods 0.000 claims description 6
- 239000008280 blood Substances 0.000 claims description 4
- 210000004369 blood Anatomy 0.000 claims description 4
- 230000002792 vascular Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 22
- 238000007920 subcutaneous administration Methods 0.000 description 5
- 238000002591 computed tomography Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 210000004088 microvessel Anatomy 0.000 description 3
- 238000012285 ultrasound imaging Methods 0.000 description 3
- XUMBMVFBXHLACL-UHFFFAOYSA-N Melanin Chemical compound O=C1C(=O)C(C2=CNC3=C(C(C(=O)C4=C32)=O)C)=C2C4=CNC2=C1C XUMBMVFBXHLACL-UHFFFAOYSA-N 0.000 description 2
- 238000002583 angiography Methods 0.000 description 2
- 208000005764 Peripheral Arterial Disease Diseases 0.000 description 1
- 208000030831 Peripheral arterial occlusive disease Diseases 0.000 description 1
- 238000002835 absorbance Methods 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- 244000309466 calf Species 0.000 description 1
- 239000002872 contrast media Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 206010033675 panniculitis Diseases 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 210000003491 skin Anatomy 0.000 description 1
- 210000004304 subcutaneous tissue Anatomy 0.000 description 1
- 238000003325 tomography Methods 0.000 description 1
- 210000000689 upper leg Anatomy 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0033—Features or image-related aspects of imaging apparatus classified in A61B5/00, e.g. for MRI, optical tomography or impedance tomography apparatus; arrangements of imaging apparatus in a room
- A61B5/0035—Features or image-related aspects of imaging apparatus classified in A61B5/00, e.g. for MRI, optical tomography or impedance tomography apparatus; arrangements of imaging apparatus in a room adapted for acquisition of images from more than one imaging mode, e.g. combining MRI and optical tomography
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0093—Detecting, measuring or recording by applying one single type of energy and measuring its conversion into another type of energy
- A61B5/0095—Detecting, measuring or recording by applying one single type of energy and measuring its conversion into another type of energy by applying light and detecting acoustic waves, i.e. photoacoustic measurements
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/08—Detecting organic movements or changes, e.g. tumours, cysts, swellings
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/08—Detecting organic movements or changes, e.g. tumours, cysts, swellings
- A61B8/0833—Detecting organic movements or changes, e.g. tumours, cysts, swellings involving detecting or locating foreign bodies or organic structures
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/08—Detecting organic movements or changes, e.g. tumours, cysts, swellings
- A61B8/0858—Detecting organic movements or changes, e.g. tumours, cysts, swellings involving measuring tissue layers, e.g. skin, interfaces
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/08—Detecting organic movements or changes, e.g. tumours, cysts, swellings
- A61B8/0875—Detecting organic movements or changes, e.g. tumours, cysts, swellings for diagnosis of bone
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/08—Detecting organic movements or changes, e.g. tumours, cysts, swellings
- A61B8/0891—Detecting organic movements or changes, e.g. tumours, cysts, swellings for diagnosis of blood vessels
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/44—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device
- A61B8/4416—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device related to combined acquisition of different diagnostic modalities, e.g. combination of ultrasound and X-ray acquisitions
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/44—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device
- A61B8/4477—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device using several separate ultrasound transducers or probes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/52—Devices using data or image processing specially adapted for diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/5215—Devices using data or image processing specially adapted for diagnosis using ultrasonic, sonic or infrasonic waves involving processing of medical diagnostic data
- A61B8/5238—Devices using data or image processing specially adapted for diagnosis using ultrasonic, sonic or infrasonic waves involving processing of medical diagnostic data for combining image data of patient, e.g. merging several images from different acquisition modes into one image
- A61B8/5261—Devices using data or image processing specially adapted for diagnosis using ultrasonic, sonic or infrasonic waves involving processing of medical diagnostic data for combining image data of patient, e.g. merging several images from different acquisition modes into one image combining images from different diagnostic modalities, e.g. ultrasound and X-ray
Definitions
- the present technology relates to optoacoustic and ultrasonic imaging devices and methods of forming optoacoustic and ultrasonic images.
- Peripheral vascular imaging is important for evaluating blood circulation in patients with peripheral arterial disease.
- vascular imaging techniques such as Doppler ultrasonic imaging, computed tomography (CT) or magnetic resonance (MR) angiography, are used in clinical practice, but generally lack spatial resolution to visualize microvessels.
- CT computed tomography
- MR magnetic resonance
- tomography and MR magnetic resonance
- Doppler ultrasound techniques are relatively safe but have low resolution.
- This embodiment is to provide a high-resolution dual-mode photoacoustic (PA) image/an image using an ultrasound image by utilizing structural information of an ultrasound image.
- PA photoacoustic
- An optoacoustic and ultrasonic imaging device includes a laser light source unit for forming a laser; an ultrasonic source forming an ultrasonic generated signal; Imaging including a laser irradiation unit receiving the laser and irradiating the laser to a target, receiving the ultrasonic generation signal, irradiating the target, and detecting photoacoustic and ultrasonic signals formed and reflected from the target probe; and a calculation unit configured to form an image of the tissue in the target by the laser and an image of the tissue in the target by the ultrasound, from the optoacoustic and ultrasonic signals detected by the ultrasonic transducer.
- the imaging probe moves according to the contour of the target and irradiates the laser and the ultrasound.
- the laser light source unit forms and provides two or more lasers of different wavelengths.
- the image of the tissue in the target by the laser is an image of blood vessels in the target.
- the image of the tissue in the target by the ultrasound is at least one of an image of blood vessels in the target, a skin image of the target, and a bone image of the target.
- the ultrasonic transducer includes a plurality of transducers arranged in an array to provide the ultrasonic waves to the target.
- the optoacoustic and ultrasonic imaging device further includes a distance sensor, and the distance sensor detects a distance to the target before irradiating the laser to the target to outline the target. form a profile for
- the ultrasound source controls the light source and the ultrasound transducer to control the irradiated ultrasound and the laser to be irradiated in synchronization.
- the optoacoustic and ultrasonic imaging apparatus further includes an examination table on which the target is placed, wherein the examination table includes a target fixing unit for fixing the target and the imaging probe disposed on the target. and a container filled with a movable structure and a medium capable of transmitting ultrasonic and optoacoustic signals between the target and the imaging probe.
- the method of forming an optoacoustic image and ultrasound image of a target in this embodiment includes: (a) forming a contour profile of the target; (b) providing laser light and ultrasound to the target according to the contour profile; and (c) forming the optoacoustic image and the ultrasonic image of the target by detecting photoacoustic and ultrasonic signals generated by the laser light and the ultrasonic waves.
- a contour profile of the target is formed by calculating a distance to the target using one of an ultrasonic transducer and a distance sensor.
- the step (b) is performed by maintaining a constant distance between the target and the ultrasonic transducer, and by maintaining a constant distance between the target and the laser irradiation unit. .
- the step (b) is performed after forming a contour profile for the entire target.
- the step (a) is performed with respect to a predetermined area of the target, and the step (b) is performed by moving according to the contour profile for the predetermined area.
- forming the optoacoustic image of the target includes detecting a background signal for a surrounding tissue, calculating a representative value of the background signal, and calculating a representative value of the background signal. It is performed by compensating the image of the target.
- the representative value is an average value of the brightness of the background signal.
- the step of compensating for the image of the target is performed by dividing the representative value by each pixel value of the image of the target.
- the step (b) is performed by irradiating the ultrasonic wave and the laser beam in synchronization.
- the step (b) is performed by irradiating two or more laser lights having different wavelengths
- the step (c) is performed by irradiating two or more laser lights having different wavelengths.
- Photoacoustic images are formed by light.
- the photoacoustic image and ultrasound image forming method includes: (d) calculating values for hemoglobin concentration, blood oxygen saturation, blood vessel distribution density, and blood vessel depth from the photoacoustic and ultrasound images; more includes
- the photoacoustic image and ultrasound image forming method includes: (d) calculating values for hemoglobin concentration, blood oxygen saturation, blood vessel distribution density, and blood vessel depth from the photoacoustic and ultrasound images; more includes
- multiple structural images are provided by combining and extracting various structural images (eg, skin, bone, and blood vessels) with photoacoustic blood vessel images.
- various structural images eg, skin, bone, and blood vessels
- image resolution can be improved by performing a scan along the contour of the target using the contour scan technique.
- FIG. 1 is a block diagram showing the outline of an optoacoustic/ultrasonic imaging device 1 according to the present embodiment.
- FIG. 2 is a flowchart showing the outline of an optoacoustic and ultrasonic imaging method according to the present embodiment.
- 3(a), 3(b) and 3(c) are diagrams schematically illustrating the operation of the optoacoustic/ultrasound imaging apparatus according to the present embodiment.
- 4(a) is a diagram illustrating an example of constructing a skin image from an ultrasound volume image.
- 4(b) is a diagram illustrating an example of constructing a bone image from an ultrasound volume image.
- 4(c) is a diagram illustrating an example of constructing a blood vessel image from an ultrasound volume image.
- FIG. 5 is an example showing an optoacoustic image of microvessels in the foot as a target (T).
- FIG. 6(a) is an ultrasound image (US) and an optoacoustic image (PA) obtained by moving the imaging probe in a straight line according to the prior art
- FIG. 6(b) shows the contour of the target with the imaging probe according to the present embodiment.
- These are the ultrasound image (US) and the photoacoustic image (PA) acquired by moving according to the profile.
- the left side of FIG. 6 is an image (PA) of a blood vessel formed from an optoacoustic image obtained by moving an imaging probe in a straight line according to the prior art
- the right side is a blood vessel image (PA-sO2) formed from a photoacoustic image.
- FIG. 6 is a drawing of 6(d)
- the diagram on the left is an image (PA) of a blood vessel formed by an optoacoustic image acquired by moving the imaging probe according to the contour profile of a target
- the diagram on the right is an image of blood vessels (PA-) formed by an optoacoustic image.
- PA blood vessels
- FIG. 7(a) is a diagram showing hemoglobin (HbT), oxygen saturation (sO2), and subcutaneous blood vessel depth (Depth) obtained by a conventional photoacoustic imaging (PA) technique
- FIG. 7(b) is a diagram showing the present embodiment. It is a diagram showing hemoglobin (HbT), oxygen saturation (sO2), and subcutaneous blood vessel depth (Depth) obtained by the photoacoustic image (PA) technique in which tissue images in the target (T) are compensated according to.
- HbT hemoglobin
- sO2 oxygen saturation
- Depth subcutaneous blood vessel depth
- HbT hemoglobin
- sO 2 oxygen saturation
- vessel density vessel density
- mean depth obtained by measuring five times according to this embodiment from four different people and obtaining average values.
- an optoacoustic/ultrasonic imaging apparatus 1 includes a laser light source unit 120 that generates a laser, an ultrasonic source 142 that generates an ultrasonic signal, and receives the laser and irradiates it to a target.
- An imaging probe 220 including a laser emitter 220 and an ultrasonic transducer 240 receiving the ultrasonic generation signal, irradiating ultrasonic waves to the target, and detecting photoacoustic and ultrasonic signals formed in the target ; and a calculation unit 146 for forming an image of the tissue in the target T by the laser and an image of the tissue in the target T by the ultrasound from the ultrasonic signal detected by the ultrasonic transducer 240. do.
- an optoacoustic/ultrasound imaging apparatus 1 includes a laser light source unit 120 and an ultrasound unit 140 .
- the laser light source unit 120 forms a laser having a predetermined wavelength.
- the laser provided by the laser light source unit 120 is a pulse laser and may have a pulse repetition rate of any one of 1 Hz to 20 Hz.
- the laser light source unit may control the provided light, and for example, it may be a Phocus Mobile product manufactured by OPOTEK.
- the laser light source unit 120 may form and provide a plurality of laser lights having different wavelengths.
- the ultrasound unit 140 may include a calculation unit 146 receiving signals detected by the ultrasound source 142 and the transducer 240 and performing imaging.
- the calculation unit 146 is included in the ultrasound unit 140.
- the calculation unit may be an independent component that receives a signal detected by an ultrasonic transducer, calculates the signal, forms an image, and performs imaging.
- the ultrasonic source 142 forms and provides ultrasonic waves of a predetermined frequency.
- the ultrasonic waves provided by the ultrasonic source 142 may have a center frequency of 5.5 MHz to 11.5 MHz.
- the ultrasonic source 140 may be ECUBE 12R equipment manufactured by Alpinion Medical Systems.
- one optoacoustic image can be obtained from one or more consecutive laser pulses, so the achievable frame rate is less than 10 Hz for both optoacoustic and ultrasound (US) images.
- US ultrasound
- the imaging probe 200 includes a laser emitter 220 that provides a laser to a target and one or more ultrasonic transducers 240 that provides ultrasonic waves to a target T.
- the laser irradiation unit 220 may include a plurality of optical fiber bundles connected to the laser light source unit 120, and irradiates a linear laser to the target T.
- the ultrasonic transducer 240 may be one or more transducers arranged in an array, for example, 128 transducers arranged in an array. These are simply exemplary numbers.
- the ultrasonic transducer 240 receives the ultrasonic generation signal provided from the ultrasonic source 140, forms ultrasonic waves in response thereto, and provides the ultrasonic waves to the target T.
- the ultrasonic transducer 240 and the laser irradiation unit 220 may be moved by a motor drive (not shown) controlled by a controller, respectively.
- the ultrasonic transducer 240 and the laser emitter 220 included in the imaging probe 200 allow the laser beam provided by the laser emitter 220 and the ultrasonic waves provided by the ultrasonic transducer 240 to pass under the imaging probe 200 in advance. It is provided to coincide with the image plane at a given location.
- the laser beam and ultrasound are provided to match each other at 10 to 50 mm below the imaging probe 200, and for example, the laser beam and ultrasound may be matched at 30 mm within the target.
- Ultrasonic waves provided by the ultrasonic transducer 240 are provided to the target T.
- Ultrasound signals corresponding to tissues and structures within the target T are formed by the provided ultrasonic waves and provided to the outside of the target T.
- the laser light provided to the target (T) by the laser irradiator 220 is absorbed by the tissue inside the target (T).
- the tissue in the target T that absorbs the laser light forms an ultrasound band signal corresponding to the tissue and provides it to the outside of the target T.
- Ultrasonic signals provided by the target T are detected by the ultrasonic transducer 240 .
- the ultrasonic signal detected by the ultrasonic transducer 240 is provided to the calculating unit 146 .
- the operation unit 146 detects a signal formed by the laser applied to the target T and forms an optoacoustic image using, for example, a Fourier domain reconstruction technique.
- the operation unit 146 detects a signal formed in the target T from the ultrasound provided to the target T, and performs, for example, delay-and-sum beamforming to reconstruct an ultrasound image.
- the reconstructed optoacoustic image and ultrasound image may be formed into image signals in the operation unit 300, displayed, and stored.
- the imaging probe may further include a distance sensor capable of measuring a distance to the target to obtain a contour profile of the target.
- the method for forming an optoacoustic image and an ultrasound image of a target according to the present embodiment includes: (a) forming a contour profile of the target (S100); (b) forming the contour profile of the target according to the contour profile; providing laser light and ultrasonic waves to (S200) and (c) detecting photoacoustic and ultrasonic signals generated by the laser light and ultrasonic waves to form the optoacoustic image and the ultrasonic image of the target (S300). ).
- a target T is scanned with the ultrasonic transducer 240 to obtain a contour of the target T.
- an ultrasound skin image is acquired using the ultrasound transducer 240 . It is desirable to simplify the skin detection process in order to expedite the process of obtaining a skin image to obtain a contour.
- the skin detection process may be performed as a smoothing process using boxcar or median filtering and setting a threshold with ultrasound intensity.
- a contour profile corresponding to the height of the target T is obtained by selecting a median value in the X direction from the acquired ultrasound skin image.
- the obtained contour profile corresponding to the height of the target T controls a motor drive (not shown) so that the imaging probe 200 performs constant speed scanning in the Y direction and simultaneously moves in the Z direction according to the height of the target T. used to do
- the step of acquiring the outline according to the present embodiment may be performed before performing the step of optoacoustic/ultrasonic imaging of the target T.
- an imaging step may be performed after the contour acquisition step. That is, after obtaining the contour of the target T, photoacoustic/ultrasonic imaging may be performed according to the obtained contour.
- after acquiring the contour of a predetermined part of the target T performing photoacoustic/ultrasonic imaging on the part according to the contour, and performing photoacoustic/ultrasonic imaging after obtaining the contour again. The process can be repeated.
- the contour obtaining step may be performed with a distance sensor.
- FIGS. 3(a), 3(b) and 3(c) are diagrams schematically illustrating the operation of the optoacoustic/ultrasound imaging apparatus according to the present embodiment.
- the target T is a human foot.
- an object to be detected such as a foot, hand, thigh, calf, upper arm, lower arm, or torso, may be set as the target T.
- the target T may be disposed on an inspection table (not shown), and an imaging operation may be performed on the target.
- the inspection table (not shown) may include a target fixing part (not shown) for fixing the target T during the imaging process.
- the inspection table may include a movable structure (not shown) including a rail and a frame capable of performing imaging while the imaging probe 200 moves on the target T.
- the moving structure may be a motorized moving structure capable of moving the imaging probe 200 in three directions of X, Y, and Z axes, respectively.
- the inspection table may include a container (not shown) in which the target T is immersed in a medium, and the container (not shown) is filled with a medium capable of transmitting ultrasonic and photoacoustic signals.
- the target fixing unit may fix the target T by immersing it in a container, and the liquid in which the target T is immersed may be water.
- the imaging probe 200 moves along the Y-axis, and the operation unit 146 stacks photoacoustic/ultrasound images obtained at each moving position. ) to form a volumetric image.
- the step size may be smaller than the -6dB height beam width of the ultrasonic transducer array.
- the step size may be smaller than 0.5 mm.
- a width w that the imaging probe 200 scans by providing laser and ultrasonic waves to the target T may be smaller than the width of the target T.
- an optoacoustic image and an ultrasound image of the entire target T may be obtained by performing scanning multiple times while the target T is fixed.
- the process of scanning by providing the laser and ultrasound by the imaging probe 200 may be performed while adjusting the height of the imaging probe 200 to correspond to the contour profile of the target. Accordingly, imaging is performed while the focus of the imaging probe 200 is adjusted to correspond to the contour profile, as shown in the right side of FIG. 3(c). From this, a higher resolution image can be obtained compared to the prior art.
- Scanning is performed to image the entire target T, and optoacoustic images and ultrasound images obtained from the results of each scan are merged with computer software to form a 3D image.
- the entire target (T) can be imaged.
- the 3D image may be obtained with computer software.
- the computer software adjusts the image height according to the contour height to recover the original contour structure information of the optoacoustic and ultrasound images acquired at the same height as the target T through the contour scan, and then the plurality of scan results. can be merged.
- a volume image is obtained from the optoacoustic image/ultrasonic image of the entire target T, and essential structures of the target are extracted.
- the ultrasound volumetric image shows various structures according to brightness, such as skin (hyperechoic, hyperechoic), bone (hyperechoic, but non-echoic underneath), and blood vessels (hyperechoic, but non-echoic inside).
- FIG. 4(a) is a diagram illustrating an example of constructing a skin image from an ultrasound volume image.
- An ultrasound skin image is obtained by detecting a skin position by detecting a smooth surface from brightness information.
- smooth surface detection can be performed with the computer software described above.
- FIG. 4(b) is a diagram illustrating an example of constructing a bone image from an ultrasound volume image.
- bones are darker than skin, but appear as bright spots.
- a pixel intensity adjustment process is performed to lower the brightness of the skin and increase the brightness of the bone, and then the bone can be detected on the software.
- a bone image may be obtained by detecting a boundary surface of a bone through a Log-Gabor filter or by inverting a pixel intensity and then detecting a contour of a lower part of a bone by computer software.
- FIG. 4(c) is a diagram illustrating an example of constructing a blood vessel image from an ultrasound volume image.
- the inside of the blood vessel is shown dark (low brightness).
- the color is inverted, the inside of the blood vessel becomes bright, and a blood vessel image can be obtained by determining whether pixels corresponding to blood inside the blood vessel are connected in the shape of a blood vessel through a Frangi filter.
- FIG. 5 is an example showing an optoacoustic image of microvessels in the foot as a target (T).
- the laser light provided by the laser irradiation unit 220 is provided to the target (T) and penetrates into the inside of the target (T). Tissues inside the target T absorb the penetrating laser light and provide an ultrasonic band signal to the outside.
- the operation unit 146 detects the signal of the ultrasonic band thus formed to form an optoacoustic image.
- a background signal by the tissue around the blood vessel is formed by the laser light provided to the target T, and the laser forming the background signal is expected to attenuate with the same tendency as that of the laser provided to the tissue around the blood vessel.
- the representative value of the background signal may be an average value of the magnitude of the background signal within a certain area.
- the tendency of the representative value corresponds to the attenuation tendency of the transmitted laser light in the target T, and when the image is formed by compensating the tissue image in the target T, the blood vessel image in the target T shown in FIG. same.
- the compensation method may be performed by dividing a pixel intensity appearing in an optoacoustic tissue image by a trend of a representative value.
- FIG. 6(a) is an ultrasound image (US) and an optoacoustic image (PA) obtained by moving the imaging probe in a straight line according to the prior art
- FIG. 6(b) shows the contour of the target with the imaging probe according to the present embodiment.
- These are the ultrasound image (US) and the photoacoustic image (PA) obtained by moving according to the profile.
- FIGS. 6(a) and 6(b) according to the prior art, it can be confirmed that the target is located and imaged below the focal plane indicated by a yellow broken line.
- the imaging probe since the imaging probe moves according to the contour profile of the target and performs imaging of the target, the target is imaged in alignment with the focal plane.
- the image formed in FIG. 6(b) has higher resolution and higher signal strength than the image obtained according to the prior art illustrated in FIG. 6(a).
- FIG. 6 the left side of FIG. 6 is an image (PA) of a blood vessel formed from an optoacoustic image obtained by moving an imaging probe in a straight line according to the prior art, and the right side is a blood vessel image (PA-sO2) formed from a photoacoustic image.
- PA blood vessel image
- PA-sO2 blood vessel image
- the photoacoustic image and oxygen uptake image of blood vessels obtained according to the present embodiment show higher detail, resulting in higher resolution. It can be seen that it has a value close to the actual oxygen saturation.
- FIG. 7(a) is a diagram showing total hemoglobin concentration (HbT), oxygen saturation (sO2), and subcutaneous blood vessel depth (Depth) obtained by the prior art photoacoustic imaging (PA) technique
- FIG. 6(b) shows this
- It is a diagram showing total hemoglobin (HbT), oxygen saturation (sO2), and subcutaneous blood vessel depth (Depth) obtained by the photoacoustic image (PA) technique in which tissue images in the target (T) are compensated according to the embodiment.
- the total hemoglobin concentration (HbT) and the oxygen saturation (sO 2 ) use the fact that light absorbance of oxidized and non-oxygenated hemoglobin differs depending on the laser wavelength.
- the concentration of oxidized and non-oxidized hemoglobin in each pixel can be calculated using a linear equation for the photoacoustic image obtained and formed by irradiating laser light of two or more wavelengths (four wavelengths in this embodiment), and the oxidation and ratio Oxidized hemoglobin concentration is added to obtain total hemoglobin concentration (HbT), and oxygen saturation (sO2) can be calculated by dividing oxidized hemoglobin concentration by total hemoglobin concentration.
- the subcutaneous blood vessel depth can be expressed by detecting the location of the skin from an ultrasound or photoacoustic image, calculating the location of a pixel corresponding to each blood vessel as a vertical distance from the location of a skin pixel, In the case of detecting the position of the skin, as in the previous example of hemoglobin, melanin distribution The position of the skin can be detected through the shape.
- FIGS. 7(a) and 7(b) in a diagram showing total hemoglobin concentration (HbT) and a diagram showing oxygen saturation (sO2) and subcutaneous tissue (Depth), tissue images within the target T are compensated. It can be seen that the image formed according to the present embodiment has a better resolution.
- HbT total hemoglobin concentration
- sO2 oxygen saturation
- vessel density mean depth obtained by measuring five times according to this embodiment from four different people and obtaining an average value. am. For example, by selecting pixels whose total hemoglobin concentration (HbT), oxygen saturation (sO2), and mean depth values are equal to or greater than a predetermined threshold value based on the total hemoglobin concentration (HbT) image, respectively. It can be calculated as the average value of the hemoglobin concentration (HbT), oxygen saturation (sO2), and depth values at the pixel location.
- the vessel density may be calculated by dividing the total area occupied by pixels having a predetermined threshold value or more based on the hemoglobin concentration (HbT) image by the total area of the target T.
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- Pathology (AREA)
- Veterinary Medicine (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Public Health (AREA)
- Biophysics (AREA)
- General Health & Medical Sciences (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Radiology & Medical Imaging (AREA)
- Acoustics & Sound (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Rheumatology (AREA)
- Vascular Medicine (AREA)
- Gynecology & Obstetrics (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
Abstract
Description
Claims (23)
- 레이저를 형성하는 레이저 광원부;초음파 생성 신호를 형성하는 초음파 원;상기 레이저를 제공받고 표적에 조사하는 레이저 조사부와, 상기 초음파 생성 신호를 제공받고 상기 표적에 초음파를 조사하고, 상기 표적에서 형성 및 반사된 광음향 및 초음파 신호를 검출하는 초음파 트랜스듀서(transducer)를 포함하는 이미징 프로브; 및상기 초음파 트랜스듀서가 검출한 초음파 신호로부터 상기 레이저에 의한 상기 표적 내 조직의 이미지와 상기 초음파에 의한 상기 표적 내 조직의 이미지를 형성하는 연산부를 포함하는 광음향 및 초음파 이미징 장치.
- 제1항에 있어서,상기 연산부는 상기 초음파 트랜스듀서가 상기 표적에 조사된 초음파로부터 상기 표적의 윤곽 프로파일을 획득하는 광음향 및 초음파 이미징 장치.
- 제1항에 있어서,상기 광음향 및 초음파 이미징 장치는거리 센서를 더 포함하며,상기 거리 센서는 상기 표적과의 거리를 검출하고,상기 연산부는 상기 거리 센서가 검출한 거리로부터 상기 표적의 윤곽 프로파일을 획득하는 광음향 및 초음파 이미징 장치.
- 제2항 및 제3항 중 어느 한 항에 있어서,상기 이미징 프로브는상기 표적의 윤곽 프로파일에 따라 이동하여 상기 레이저와 상기 초음파를 조사하고,상기 연산부는 상기 윤곽 프로파일에 따라 이미지 높이를 조정하여 상기 표적 내 조직의 이미지를 형성하는 광음향 및 초음파 이미징 장치.
- 제1항에 있어서,상기 레이저 광원부는 서로 다른 두 개 이상의 파장의 레이저를 형성하여 제공하는 광음향 및 초음파 이미징 장치.
- 제1항에 있어서,상기 레이저에 의한 상기 표적 내 조직의 이미지는상기 표적의 피부, 배경 조직 및 혈관 중 어느 하나 이상에 대한 이미지인 광음향 및 초음파 이미징 장치.
- 제1항에 있어서,상기 초음파에 의한 상기 표적 내 조직의 이미지는상기 표적 내의 혈관에 대한 이미지, 상기 표적의 피부 이미지 및 상기 표적의 뼈 이미지 중 어느 하나 이상인 광음향 및 초음파 이미징 장치.
- 제1항에 있어서,상기 초음파 트랜스듀서는,상기 초음파를 상기 표적에 제공하는 어레이로 배치된 복수개의 트랜스듀서를 포함하는 광음향 및 초음파 이미징 장치.
- 제1항에 있어서,상기 초음파 트랜스듀서는,상기 초음파를 상기 표적에 제공하는 어레이로 배치된 복수개의 트랜스듀서를 포함하는 광음향 및 초음파 이미징 장치.
- 제1항에 있어서,상기 초음파 원은상기 레이저 광원과, 상기 초음파 트랜스듀서(transducer)를 제어하여 조사되는 상기 초음파와 상기 레이저가 동기화하여 조사되도록 제어하는 광음향 및 초음파 이미징 장치.
- 제1항에 있어서,상기 광음향 및 초음파 이미징 장치는,상기 표적이 배치되는 검사대를 더 포함하며,상기 검사대는상기 표적을 고정하는 표적 고정부와,상기 이미징 프로브를 상기 표적위에 배치 및 이동시킬 수 있는 이동 구조 및상기 표적과 상기 이미징 프로브 사이에 초음파 및 광음향 신호를 전달할 수 있는 매질이 채워진 컨테이너를 포함하는 광음향 및 초음파 이미징 장치.
- 표적의 광음향 이미지 및 초음파 이미지를 형성하는 방법으로, 상기 방법은:(a) 상기 표적의 윤곽 프로파일을 형성하는 단계와,(b) 상기 윤곽 프로파일에 따라 상기 표적에 레이저 광과 초음파를 제공하는 단계 및(c) 상기 레이저 광과 상기 초음파에 의해 발생한 광음향 및 초음파 신호를 검출하여 상기 표적의 상기 광음향 이미지 및 상기 초음파 이미지를 형성하는 단계를 포함하는 광음향 이미지 및 초음파 이미지 형성 방법.
- 제12항에 있어서,상기 (a)단계는,초음파 트랜스듀서 및 거리 센서 중 어느 하나로 상기 표적과의 거리를 연산하여 상기 표적의 윤곽 프로파일을 형성하는 광음향 이미지 및 초음파 이미지 형성 방법.
- 제12항에 있어서,상기 (b) 단계는,상기 표적과 상기 초음파 트랜스듀서 사이의 거리를 일정하게 유지하여 수행하고, 상기 표적과 상기 레이저 조사부 사이의 거리를 일정하게 유지하여 수행하는 광음향 이미지 및 초음파 이미지 형성 방법.
- 제12항에 있어서,상기 (b) 단계는,상기 표적의 전체에 대한 윤곽 프로파일을 형성한 후 수행되는 광음향 이미지 및 초음파 이미지 형성 방법.
- 제12항에 있어서,상기 (a) 단계는,상기 표적의 일정 영역에 대하여 수행되고,상기 (b) 단계는, 상기 일정 영역에 대한 윤곽 프로파일에 따라 이동하여 수행되는 광음향 이미지 및 초음파 이미지 형성 방법.
- 제12항에 있어서,상기 표적의 상기 광음향 이미지를 형성하는 단계는,주변 조직에 대한 배경 신호를 검출하는 단계와,상기 배경 신호의 대푯값을 연산하는 단계 및상기 배경 신호의 대푯값으로부터 상기 표적의 영상을 보상하여 수행하는 광음향 이미지 및 초음파 이미지 형성 방법.
- 제17항에 있어서,상기 대푯값은 상기 배경 신호 밝기의 평균값인 광음향 이미지 및 초음파 이미지 형성 방법.
- 제17항에 있어서,상기 표적의 영상을 보상하는 단계는 상기 대푯값을 상기 광음향 이미지의 픽셀 강도에서 나누어서 수행하는 광음향 이미지 및 초음파 이미지 형성 방법.
- 제12항에 있어서,상기 (c) 단계는,상기 윤곽 프로파일에 따라 이미지 높이를 조정하여 상기 표적 내 조직의 이미지를 형성하는 광음향 이미지 및 초음파 이미지 형성 방법.
- 제12항에 있어서,상기 (b) 단계에서상기 초음파와 상기 레이저는 동기화하여 조사되는 광음향 이미지 및 초음파 이미지 형성 방법.
- 제12항에 있어서,상기 (b) 단계는 서로 다른 파장을 가지는 두 개 이상의 레이저 광을 조사하여 수행하고,상기 (c) 단계는, 조사된 상기 서로 다른 파장을 가지는 두 개 이상의 레이저 광에 의한 광음향 이미지를 형성하는 광음향 이미지 및 초음파 이미지 형성 방법.
- 제12항에 있어서,상기 광음향 이미지 및 초음파 이미지 형성 방법은,(d) 상기 광음향 및 초음파 이미지로부터 헤모글로빈 농도, 혈중 산소포화도, 혈관 분포 밀도 및 혈관 깊이에 대한 수치를 산출하는 단계를 더 포함하는 광음향 이미지 및 초음파 이미지 형성 방법.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2023543082A JP2024507064A (ja) | 2021-08-10 | 2021-09-02 | 光音響および超音波の撮像装置、ならびに画像形成方法 |
CN202180092899.2A CN117295452A (zh) | 2021-08-10 | 2021-09-02 | 光声和超声成像设备以及图像形成方法 |
US18/268,271 US20240293031A1 (en) | 2021-08-10 | 2021-09-02 | Photoacoustic and ultrasonic imaging device, and imaging forming method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2021-0105598 | 2021-08-10 | ||
KR1020210105598A KR102636714B1 (ko) | 2021-08-10 | 2021-08-10 | 광음향 및 초음파 이미징 장치 및 이미지 형성 방법 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2023017891A1 true WO2023017891A1 (ko) | 2023-02-16 |
Family
ID=85200718
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2021/011871 WO2023017891A1 (ko) | 2021-08-10 | 2021-09-02 | 광음향 및 초음파 이미징 장치 및 이미지 형성 방법 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20240293031A1 (ko) |
JP (1) | JP2024507064A (ko) |
KR (1) | KR102636714B1 (ko) |
CN (1) | CN117295452A (ko) |
WO (1) | WO2023017891A1 (ko) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20090088909A (ko) * | 2006-12-19 | 2009-08-20 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | 결합된 광음향 및 초음파 이미징 시스템 |
JP2010012295A (ja) * | 2009-09-14 | 2010-01-21 | Toshiba Corp | 生体情報映像装置 |
JP2012187394A (ja) * | 2011-02-22 | 2012-10-04 | Fujifilm Corp | 光音響計測装置及び光音響信号検出方法 |
KR20150120783A (ko) * | 2014-04-18 | 2015-10-28 | 부경대학교 산학협력단 | 진단 치료 겸용 광융합형 초음파기기 |
KR20180049977A (ko) * | 2016-11-04 | 2018-05-14 | 서강대학교산학협력단 | 광음향 영상의 배경 노이즈를 제거하는 시스템 및 그 방법 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2806803B1 (en) * | 2012-01-23 | 2019-03-13 | Tomowave Laboratories, Inc. | Laser optoacoustic ultrasonic imaging system (louis) and methods of use |
-
2021
- 2021-08-10 KR KR1020210105598A patent/KR102636714B1/ko active IP Right Grant
- 2021-09-02 WO PCT/KR2021/011871 patent/WO2023017891A1/ko active Application Filing
- 2021-09-02 US US18/268,271 patent/US20240293031A1/en active Pending
- 2021-09-02 JP JP2023543082A patent/JP2024507064A/ja active Pending
- 2021-09-02 CN CN202180092899.2A patent/CN117295452A/zh active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20090088909A (ko) * | 2006-12-19 | 2009-08-20 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | 결합된 광음향 및 초음파 이미징 시스템 |
JP2010012295A (ja) * | 2009-09-14 | 2010-01-21 | Toshiba Corp | 生体情報映像装置 |
JP2012187394A (ja) * | 2011-02-22 | 2012-10-04 | Fujifilm Corp | 光音響計測装置及び光音響信号検出方法 |
KR20150120783A (ko) * | 2014-04-18 | 2015-10-28 | 부경대학교 산학협력단 | 진단 치료 겸용 광융합형 초음파기기 |
KR20180049977A (ko) * | 2016-11-04 | 2018-05-14 | 서강대학교산학협력단 | 광음향 영상의 배경 노이즈를 제거하는 시스템 및 그 방법 |
Also Published As
Publication number | Publication date |
---|---|
KR102636714B1 (ko) | 2024-02-14 |
CN117295452A (zh) | 2023-12-26 |
JP2024507064A (ja) | 2024-02-16 |
KR20230023457A (ko) | 2023-02-17 |
US20240293031A1 (en) | 2024-09-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2014073907A1 (ko) | 유방암 진단용 광음향 스캐닝 장치 | |
USRE38800E1 (en) | NIR clinical opti-scan system | |
JPH11514549A (ja) | レーザー光学音響画像形成装置 | |
CA2319458A1 (en) | Transabdominal examination, monitoring and imaging of tissue | |
CN111839730B (zh) | 一种用于引导肿瘤切除的光声成像手术导航平台 | |
Carolus et al. | High-resolution in vivo imaging of peripheral nerves using optical coherence tomography: a feasibility study | |
Basij et al. | Dual-illumination ultrasound/photoacoustic system for cervical cancer imaging | |
Menozzi et al. | Three-dimensional non-invasive brain imaging of ischemic stroke by integrated photoacoustic, ultrasound and angiographic tomography (PAUSAT) | |
Lee et al. | Panoramic volumetric clinical handheld photoacoustic and ultrasound imaging | |
Huang et al. | Dual-scan photoacoustic tomography for the imaging of vascular structure on foot | |
WO2023017891A1 (ko) | 광음향 및 초음파 이미징 장치 및 이미지 형성 방법 | |
US20090069695A1 (en) | Device for imaging a turbid medium | |
WO2011030962A1 (ko) | 혈관 내 초음파 영상을 이용한 혈관 내 죽상 경화반 성분 측정 장치 및 방법 | |
US10492694B2 (en) | Object information acquisition apparatus | |
Yan et al. | Endocavity ultrasound and photoacoustic system for fetal and maternal imaging: design, implementation, and ex-vivo validation | |
JP2017148580A (ja) | 被検体情報取得装置 | |
CN116350188A (zh) | 一种无创可视化导引气管插管的光声成像系统及方法 | |
US5835556A (en) | Process and device for computer tomography transillumination for treatment | |
US8395120B2 (en) | Bidirectional optical scanner assisting in mammography | |
Holm et al. | The relationship of computed tomography and ultrasonography in diagnosis of abdominal disease | |
Xu et al. | Localization and functional parameter reconstruction of suspicious breast lesions by near infrared/ultrasound dual modal imaging | |
JP7187734B1 (ja) | 画像処理装置及びプログラム | |
JPH0464348A (ja) | 超音波カテーテル装置 | |
US8378302B2 (en) | Bidirectional optical scanner assisting in mammography | |
JP2017042603A (ja) | 被検体情報取得装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 21953538 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 18268271 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2023543082 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 202180092899.2 Country of ref document: CN |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 21953538 Country of ref document: EP Kind code of ref document: A1 |