Search Results - "AHN, Young Bok"
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Performance evaluation of a multi-pinhole collimator with vertical septa
Published in Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment (21-03-2011)“…The authors have previously reported a simulation study on a novel multi-pinhole (MP) collimator that is able to provide improved angular sampling and an…”
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Journal Article -
2
Frequency of osteoporosis in 46 men with methamphetamine abuse hospitalized in a National Hospital
Published in Forensic science international (01-07-2009)“…Abstract Background Methamphetamine, a derivative of amphetamine, has been well known to cause mental problems in humans; however, its physical effects are…”
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Journal Article -
3
Performance Characterization of a Silicon Drift Detector for Gamma Ray Imaging
Published in IEEE transactions on nuclear science (01-06-2010)“…This study examined the intrinsic performance of silicon drift detector (SDD)-based gamma detectors under a variety of conditions. The prototype detector…”
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Journal Article -
4
Optimal Optical Conditions and Positioning Scheme for an Ultrahigh-Resolution Silicon Drift Detector-Based Gamma Camera
Published in Journal of nuclear science and technology (01-12-2008)“…In this study, we optimized the optical conditions and associated positioning scheme for an ultrahighspatial-resolution, solid-state gamma detector. The…”
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Journal Article -
5
A miniature SPECT using multi-pinhole collimator with vertical septa
Published in 2009 IEEE Nuclear Science Symposium Conference Record (NSS/MIC) (01-10-2009)“…We had previously reported a simulation study on a multi-pinhole collimator (MP) having lead vertical septa which could provide improved angular sampling and…”
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Conference Proceeding
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6
Optics Optimization for a Solid State Gamma Camera Detector Module
Published in 2006 IEEE Nuclear Science Symposium Conference Record (01-10-2006)“…The aim of this study is to optimize optics design parameters for a solid state gamma camera detector module. The design parameter includes surface treatments,…”
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Conference Proceeding -
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An Investigation to Design High Performance Multi-Pinhole Collimator
Published in 2006 IEEE Nuclear Science Symposium Conference Record (01-10-2006)“…The aim of this study is to design a detector module employing multi-pinhole collimator which could be utilized in various SPECT systems. Monte Carlo…”
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Conference Proceeding -
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A prototype hand-held tri-modal instrument for in vivo ultrasound, photoacoustic, and fluorescence imaging
Published in Review of scientific instruments (01-03-2015)“…Multi-modality imaging is beneficial for both preclinical and clinical applications as it enables complementary information from each modality to be obtained…”
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Journal Article -
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Estimation of mean frequency and variance of ultrasonic Doppler signal by using second-order autoregressive model
Published in IEEE transactions on ultrasonics, ferroelectrics, and frequency control (01-05-1991)“…In order to estimate the mean frequency and variance of the diagnostic ultrasound Doppler signal in the presence of clutter noise, a new estimator using a…”
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Journal Article -
10
Multi-order sampling for digital beamforming of wide-band signals
Published in IEEE transactions on ultrasonics, ferroelectrics, and frequency control (01-05-1996)“…After proving that the second-order sampling method introduces too much error for beamforming of the wide-band signal generally used in ultrasound imaging…”
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Journal Article -
11
Design consideration of a multipinhole collimator with septa for ultra high-resolution silicon drift detector modules
Published in Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment (21-07-2009)“…The aim of this study was to design a multipinhole (MP) collimator with lead vertical septa coupled to a high-resolution detector module containing silicon…”
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Journal Article -
12
Optimal Optical Conditions and Positioning Scheme for an Ultrahigh-Resolution Silicon Drift Detector-Based Gamma Camera
Published in Journal of nuclear science and technology (01-12-2008)“…In this study, we optimized the optical conditions and associated positioning scheme for an ultrahigh-spatial-resolution, solid-state gamma detector. The…”
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Journal Article -
13
Experimental study of transmit synthetic focusing combined with receive dynamic focusing in B-mode ultrasound imaging systems
Published in 1999 IEEE Ultrasonics Symposium. Proceedings. International Symposium (Cat. No.99CH37027) (1999)“…Recently, a method for focusing at all imaging points both in transmit and receive was proposed. This method uses transmit synthetic focusing and receive…”
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Conference Proceeding -
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Experimental considerations of multi-order sampling for digital beamforming
Published in 1998 IEEE Ultrasonics Symposium. Proceedings (Cat. No. 98CH36102) (1998)“…A comparison is made of several bandwidth sampling methods, including the recently proposed multi-order sampling method, in terms of envelope detection…”
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Conference Proceeding -
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Experimental study of sidelobe reduction filters in ultrasound imaging
Published in 2000 IEEE Ultrasonics Symposium. Proceedings. An International Symposium (Cat. No.00CH37121) (2000)“…The experimental results of two types of sidelobe reduction filters are presented. These filters, named sidelobe filter and null filter, improve the resolution…”
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Conference Proceeding