Dr. Hyun Jae Kang Profile

Dr. Hyun Jae Kang

at Johns Hopkins Univ

SPIE Involvement:

Author

Publications (28)

SPIE Journal Paper | July 27, 2017

Active phantoms: a paradigm for ultrasound calibration using phantom feedback

Cheng, Alexis , Guo, Xiaoyu , Zhang, Haichong , Kang, Hyun , Etienne-Cummings, Ralph , Boctor, Emad

JMI Vol. 4 Issue 03

KEYWORDS: Calibration, Image segmentation, Transducers, Ultrasonography, Image quality, Robotics, Computer simulations, Imaging systems, Ferroelectric materials, Acoustics

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PROCEEDINGS ARTICLE | March 24, 2016

Ultrasound to video registration using a bi-plane transrectal probe with photoacoustic markers

Proc. SPIE. 9786, Medical Imaging 2016: Image-Guided Procedures, Robotic Interventions, and Modeling

KEYWORDS: Ferroelectric materials, Imaging systems, Calibration, Ultrasonography, Video, Stereoscopic cameras, Transducers, Navigation systems, Photoacoustic spectroscopy, Acoustics

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PROCEEDINGS ARTICLE | March 15, 2016

Photoacoustic image reconstruction from ultrasound post-beamformed B-mode image

Proc. SPIE. 9708, Photons Plus Ultrasound: Imaging and Sensing 2016

KEYWORDS: Image compression, Ultrasonography, Image processing, Scanners, Image restoration, Image acquisition, Data acquisition, Signal processing, Convolution, Reconstruction algorithms, Data conversion, Acoustics

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PROCEEDINGS ARTICLE | July 20, 2015

Active point out-of-plane ultrasound calibration

Proc. SPIE. 9415, Medical Imaging 2015: Image-Guided Procedures, Robotic Interventions, and Modeling

KEYWORDS: Surgery, Calibration, Ultrasonography, Image segmentation, Image processing, Error analysis, Robotics, Image acquisition, Transducers, Image-guided intervention

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PROCEEDINGS ARTICLE | July 20, 2015

Feasibility study of robotically tracked photoacoustic computed tomography

Proc. SPIE. 9419, Medical Imaging 2015: Ultrasonic Imaging and Tomography

KEYWORDS: Calibration, Ultrasonography, Robotics, Tomography, Transducers, Photoacoustic imaging, Photoacoustic tomography, Reconstruction algorithms, Photoacoustic spectroscopy, Robotic systems

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PROCEEDINGS ARTICLE | March 17, 2015

Iterative motion compensation approach for ultrasonic thermal imaging

Proc. SPIE. 9419, Medical Imaging 2015: Ultrasonic Imaging and Tomography

KEYWORDS: Thermography, Signal to noise ratio, Tissues, Ultrasonography, Pathology, Ultrasonics, Motion detection, Transducers, Motion estimation, Temperature metrology

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PROCEEDINGS ARTICLE | March 13, 2015

Needle visualization using photoacoustic effect

Proc. SPIE. 9323, Photons Plus Ultrasound: Imaging and Sensing 2015

KEYWORDS: Optical fibers, Image visualization, Visualization, Ultrasonography, Image processing, Data acquisition, Optical tracking, Photoacoustic spectroscopy, Acoustics, Polonium

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PROCEEDINGS ARTICLE | March 11, 2015

Photoacoustic reconstruction using beamformed RF data: a synthetic aperture imaging approach

Proc. SPIE. 9323, Photons Plus Ultrasound: Imaging and Sensing 2015

KEYWORDS: Signal to noise ratio, Ultrasonography, Interference (communication), Data acquisition, Transducers, Photoacoustic imaging, Reconstruction algorithms, Photoacoustic spectroscopy, Synthetic aperture imaging, Acoustics

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PROCEEDINGS ARTICLE | March 11, 2015

Multispectral photoacoustic decomposition with localized regularization for detecting targeted contrast agent

Proc. SPIE. 9323, Photons Plus Ultrasound: Imaging and Sensing 2015

KEYWORDS: Target detection, Cancer, Imaging systems, Calibration, Ultrasonography, Dysprosium, Prostate cancer, Photoacoustic spectroscopy, Signal detection, Absorption

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PROCEEDINGS ARTICLE | March 4, 2015

Direct ultrasound to video registration using photoacoustic markers from a single image pose

Proc. SPIE. 9313, Advanced Biomedical and Clinical Diagnostic and Surgical Guidance Systems XIII

KEYWORDS: 3D acquisition, Surgery, Ultrasonography, Image segmentation, Video, Wavefronts, Image registration, Transducers, Navigation systems, Photoacoustic spectroscopy

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PROCEEDINGS ARTICLE | March 20, 2014

Software framework for spatially tracked pre-beamformed RF data with a freehand clinical ultrasound transducer

Proc. SPIE. 9040, Medical Imaging 2014: Ultrasonic Imaging and Tomography

KEYWORDS: 3D acquisition, Sensors, Calibration, Ultrasonography, Medical imaging, Data acquisition, Image quality, Transducers, 3D image processing, Software frameworks

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PROCEEDINGS ARTICLE | March 3, 2014

Concurrent photoacoustic markers for direct three-dimensional ultrasound to video registration

Proc. SPIE. 8943, Photons Plus Ultrasound: Imaging and Sensing 2014

KEYWORDS: 3D acquisition, Surgery, Sensors, Calibration, Ultrasonography, Video, Navigation systems, Optical tracking, Kidney, Photoacoustic spectroscopy

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PROCEEDINGS ARTICLE | March 3, 2014

Freehand spatial-angular compounding of photoacoustic images

Proc. SPIE. 8943, Photons Plus Ultrasound: Imaging and Sensing 2014

KEYWORDS: Signal to noise ratio, Ultrasonography, Ions, Image resolution, Interference (communication), Image registration, Image quality, Photoacoustic imaging, Photoacoustic spectroscopy, Acoustics

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Photoacoustic (PA) imaging is an emerging medical imaging modality that relies on the absorption of optical energy and the subsequent emission of acoustic waves that are detected with a conventional ultrasound probe. PA images are susceptible to background noise artifacts that reduce the signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR). We investigated spatial-angular compounding of PA images to enhance these image qualities. Spatial-angular compounding was implemented by averaging multiple PA images acquired as an ultrasound probe was rotated about the elevational axis with the laser beam and PA target fixed in the same location. An external tracking system was used to provide the position and orientation (i.e. pose) information of each PA image. Based on this pose information, frames in similar elevational planes were filtered from the acquired image data and compounded using one of two methods. One method registered overlapping signals between frames prior to compounding (using the pose information), while the second method omitted this spatial registration step. These two methods were applied to pre-beamformed RF, beamformed RF, and envelope-detected data, resulting in six different compounding pipelines. Compounded PA images with similar lateral resolution to a single reference image had factors of 1.1 - 1.6, 2.0 - 11.1, and 2.0 - 11.1 improvements in contrast, CNR, and SNR, respectively, when compared to the reference image. These improvements depended on the amount of relative motion between the reference image and the images that were compounded. The inclusion of spatial registration prior to compounding preserved lateral resolution and signal location when the relative rotations about the elevation axis were 3.5° or less for images that were within an elevational distance of 2.5 mm from the reference image, particularly when the method was applied to the enveloped-detected data. Results indicate that spatial-angular compounding has the potential to improve image quality for a variety of photoacoustic imaging applications.

PROCEEDINGS ARTICLE | March 3, 2014

Photoacoustic active ultrasound element for catheter tracking

Proc. SPIE. 8943, Photons Plus Ultrasound: Imaging and Sensing 2014

KEYWORDS: Optical components, Safety, Visualization, Imaging systems, Ultrasonography, Control systems, Semiconductor lasers, Photoacoustic spectroscopy, Chemical elements, Signal detection

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SPIE Journal Paper | June 4, 2012

Real-time photoacoustic imaging of prostate brachytherapy seeds using a clinical ultrasound system

Kuo, Nathanael , Kang, Hyun Jae , Song, Danny , Kang, Jin , Boctor, Emad

JBO Vol. 17 Issue 06

KEYWORDS: Prostate, Ultrasonography, Imaging systems, Photoacoustic imaging, Photoacoustic spectroscopy, Data acquisition, Transducers, Signal to noise ratio, Surgery, Tissue optics

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PROCEEDINGS ARTICLE | February 25, 2012

Software framework of a real-time pre-beamformed RF data acquisition of an ultrasound research scanner

Proc. SPIE. 8320, Medical Imaging 2012: Ultrasonic Imaging, Tomography, and Therapy

KEYWORDS: Visualization, Imaging systems, Ultrasonography, Data acquisition, Photoacoustic imaging, Photoacoustic spectroscopy, Data conversion, Data communications, Software frameworks, Laser systems engineering

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PROCEEDINGS ARTICLE | February 25, 2012

Ultrasound imaging software framework for real-time monitoring of acoustic ablation therapy

Proc. SPIE. 8320, Medical Imaging 2012: Ultrasonic Imaging, Tomography, and Therapy

KEYWORDS: Switches, Tumors, Tissues, Ultrasonography, Data transmission, Software development, Image filtering, Elastography, Acoustics, Software frameworks

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PROCEEDINGS ARTICLE | February 17, 2012

System for robot-assisted real-time laparoscopic ultrasound elastography

Proc. SPIE. 8316, Medical Imaging 2012: Image-Guided Procedures, Robotic Interventions, and Modeling

KEYWORDS: Image compression, Tissues, Surgery, Imaging systems, Ultrasonography, Computing systems, Control systems, Robots, Elastography, Laparoscopy

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PROCEEDINGS ARTICLE | March 2, 2011

Ultrasound calibration framework for the image-guided surgery toolkit (IGSTK)

Proc. SPIE. 7964, Medical Imaging 2011: Visualization, Image-Guided Procedures, and Modeling

KEYWORDS: X-ray computed tomography, Calibration, Ultrasonography, Matrices, 3D modeling, Image registration, Medical imaging, Data acquisition, Image-guided intervention, 3D image processing

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PROCEEDINGS ARTICLE | March 2, 2011

Photoacoustic imaging of prostate brachytherapy seeds in ex vivo prostate

Proc. SPIE. 7964, Medical Imaging 2011: Visualization, Image-Guided Procedures, and Modeling

KEYWORDS: Cancer, Visualization, Ultrasonography, Data acquisition, Photoacoustic imaging, Prostate, Prostate cancer, Photoacoustic spectroscopy, Tissue optics, Neodymium

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PROCEEDINGS ARTICLE | April 2, 2010

A novel robust diffraction-based metrology concept for measurement and monitoring of critical layers in memory devices

Proc. SPIE. 7638, Metrology, Inspection, and Process Control for Microlithography XXIV

KEYWORDS: Oxides, Lithography, Diffraction, Metrology, Image processing, Scatterometry, Photoresist processing, Semiconducting wafers, Overlay metrology, Diffraction gratings

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PROCEEDINGS ARTICLE | March 16, 2010

Precisely shaped acoustic ablation of tumors utilizing steerable needle and 3D ultrasound image guidance

Proc. SPIE. 7625, Medical Imaging 2010: Visualization, Image-Guided Procedures, and Modeling

KEYWORDS: Liver, Tumors, Tissues, Calibration, Ultrasonography, Control systems, Therapeutics, Acoustics, Prototyping, 3D image processing

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PROCEEDINGS ARTICLE | March 12, 2010

Novel reconstruction and feature exploitation techniques for sensorless freehand 3D ultrasound

Proc. SPIE. 7629, Medical Imaging 2010: Ultrasonic Imaging, Tomography, and Therapy

KEYWORDS: 3D acquisition, Tissues, Speckle, Sensors, Calibration, Ultrasonography, Error analysis, Image resolution, Data acquisition, Motion estimation

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PROCEEDINGS ARTICLE | March 13, 2009

Statistical approach to design DRAM bitcell considering overlay errors

Proc. SPIE. 7275, Design for Manufacturability through Design-Process Integration III

KEYWORDS: Surface plasmons, Optical lithography, Statistical analysis, Error analysis, Manufacturing, Resistance, Monte Carlo methods, Process control, Critical dimension metrology, Overlay metrology

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PROCEEDINGS ARTICLE | March 26, 2008

Diffraction based overlay metrology for alpha-carbon applications

Proc. SPIE. 6922, Metrology, Inspection, and Process Control for Microlithography XXII

KEYWORDS: Diffraction, Spectroscopy, Silicon, Reflectivity, Scatterometry, Photomasks, Optical alignment, Semiconducting wafers, Overlay metrology, Diffraction gratings

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PROCEEDINGS ARTICLE | April 5, 2007

Overlay metrology for dark hard mask process: simulation and experiment study

Proc. SPIE. 6518, Metrology, Inspection, and Process Control for Microlithography XXI

KEYWORDS: Semiconductors, Lithography, Image processing, Scanners, Photoresist materials, Image quality, Photomasks, Optical alignment, Semiconducting wafers, Overlay metrology

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PROCEEDINGS ARTICLE | June 26, 2003

Challenge for effective OCV control in 90-nm logic gate using ArF lithography

Proc. SPIE. 5040, Optical Microlithography XVI

KEYWORDS: Lithography, Logic, Atrial fibrillation, Photoresist materials, Photomasks, Transistors, Logic devices, Optical proximity correction, Critical dimension metrology, Line edge roughness

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PROCEEDINGS ARTICLE | March 11, 2002

One step forward to maturity of AF (assistant feature)-OPC in 100-nm level DRAM application

Proc. SPIE. 4562, 21st Annual BACUS Symposium on Photomask Technology

KEYWORDS: Lithography, Optical lithography, Atrial fibrillation, Lithographic illumination, Photomasks, Optical proximity correction, Photomask technology, Resolution enhancement technologies

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Showing 5 of 28 publications

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