Dr. Robert A. Close Profile

Dr. Robert A. Close

Research Scientist at Cedars-Sinai Medical Ctr

SPIE Involvement:

Author

Publications (21)

Proceedings Article | 5 May 2004 Paper

Stabilized display of coronary x-ray image sequences

Robert Close, James Whiting, Xiaolin Da, Neal Eigler

Proceedings Volume 5367, (2004) https://doi.org/10.1117/12.535854

KEYWORDS: Angiography, Visualization, Arteries, Automatic tracking, X-ray imaging, Detection and tracking algorithms, Imaging systems, X-rays, Medical imaging, Optical tracking

Read Abstract +

Proceedings Article | 3 May 2002 Paper

Experimental demonstration of automated scatter-glare correction in fluoroscopic images

Robert Close, Craig Morioka, James Whiting

Proceedings Volume 4682, (2002) https://doi.org/10.1117/12.465576

KEYWORDS: X-rays, Scattering, X-ray imaging, Convolution, Sensors, Error analysis, Signal attenuation, Image intensifiers, Laser scattering, X-ray detectors

Read Abstract +

Proceedings Article | 3 July 2001 Paper

Improved detection of simulated thrombus by layer decomposition of coronary angiograms

Robert Close, Craig Morioka, Craig Abbey, James Whiting

Proceedings Volume 4322, (2001) https://doi.org/10.1117/12.431150

KEYWORDS: Angiography, Arteries, Eye, Digital imaging, Image filtering, Signal to noise ratio, Motion estimation, Image processing, Signal processing, Computer simulations

Read Abstract +

Proceedings Article | 6 June 2000 Paper

Layer decomposition of coronary angiograms

Robert Close, Craig Abbey, James Whiting

Proceedings Volume 3979, (2000) https://doi.org/10.1117/12.387630

KEYWORDS: Angiography, Motion models, Motion estimation, X-ray imaging, X-rays, Visibility, Image segmentation, Arteries, 3D image processing, X-ray detectors

Read Abstract +

Proceedings Article | 18 April 2000 Paper

Improved image guidance of coronary stent deployment

Robert Close, Craig Abbey, James Whiting

Proceedings Volume 3976, (2000) https://doi.org/10.1117/12.383052

KEYWORDS: X-rays, Arteries, Angiography, Motion measurement, Visibility, X-ray imaging, Visualization, Head, Motion models, Chest

Read Abstract +

Proceedings Article | 21 May 1999 Paper

Decomposition of coronary angiograms into nonrigid moving layers

Robert Close, James Whiting

Proceedings Volume 3661, (1999) https://doi.org/10.1117/12.348553

KEYWORDS: Angiography, Signal attenuation, Arteries, X-rays, Visualization, Image segmentation, Correlation function, Optical flow, Absorbance, Motion estimation

Read Abstract +

Proceedings Article | 20 May 1999 Paper

Improved bolus localization for videodensitometry

Robert Close, Simon Shpilfoygel, Reza Jahan, Gary Duckwiler, Daniel Valentino

Proceedings Volume 3660, (1999) https://doi.org/10.1117/12.349615

KEYWORDS: Blood circulation, In vivo imaging, Visualization, Luminescence, Ultraviolet radiation, Ultraviolet photography, Photography, Angiography, Physiology, Blood

Read Abstract +

Proceedings Article | 20 May 1999 Paper

Instantaneous videodensitometric radially dependent bulk blood flow measurement

Simon Shpilfoygel, Robert Close, Reza Jahan, Gary Duckwiler, Daniel Valentino

Proceedings Volume 3660, (1999) https://doi.org/10.1117/12.349608

KEYWORDS: Angiography, Blood circulation, X-rays, X-ray imaging, Velocity measurements, Blood, Medical imaging, Heart, Computer simulations, Blood vessels

Read Abstract +

Proceedings Article | 24 July 1998 Paper

Automatic correction of x-ray scatter and veiling glare in simulated fluoroscopic images

Robert Close, Kokila Shah, James Whiting

Proceedings Volume 3336, (1998) https://doi.org/10.1117/12.317072

KEYWORDS: X-rays, X-ray imaging, Calibration, Image filtering, Signal attenuation, Convolution, Scattering, Image intensifiers, Point spread functions, Gaussian filters

Read Abstract +

Proceedings Article | 3 July 1998 Paper

Modified distance-density methods for instantaneous angiographic blood-flow measurement

Simon Shpilfoygel, Robert Close, Reza Jahan, Gary Duckwiler, Daniel Valentino

Proceedings Volume 3337, (1998) https://doi.org/10.1117/12.312569

KEYWORDS: Angiography, Blood circulation, Reliability, Distance measurement, Yield improvement, Image segmentation, Vascular diseases, X-rays, Velocity measurements, Medical imaging

Read Abstract +

Proceedings Article | 2 May 1997 Paper

Fluoroscopic 3D reconstruction of coronary stents

Robert Close, Craig Morioka, James Whiting

Proceedings Volume 3032, (1997) https://doi.org/10.1117/12.274014

KEYWORDS: 3D modeling, 3D image processing, Inspection, Intravascular ultrasound, 3D image reconstruction, X-rays, Stereoscopy, Fluoroscopy, Motion measurement, Image intensifiers

Read Abstract +

Proceedings Article | 25 April 1997 Paper

Motion-compensated temporal filtering of B-mode echocardiograms

Matthias Kroemer, Robert Close, Julius Gardin, Dietrich Meyer-Ebrecht, Jack Sklansky

Proceedings Volume 3034, (1997) https://doi.org/10.1117/12.274083

KEYWORDS: Signal to noise ratio, Motion estimation, Interference (communication), Image filtering, Electronic filtering, Speckle, Heart, Signal detection, Image analysis, Spatial filters

Read Abstract +

Proceedings Article | 11 April 1996 Paper

Maximum likelihood technique for blind noise estimation

Robert Close, James Whiting

Proceedings Volume 2708, (1996) https://doi.org/10.1117/12.237784

KEYWORDS: Interference (communication), Statistical analysis, Image filtering, Image analysis, Filtering (signal processing), Digital filtering, Error analysis, Analytical research, Electronic filtering, Image compression

Read Abstract +

Proceedings Article | 9 October 1995 Paper

Regularization technique for restoration of x-ray fluoroscopic images

Robert Close, James Whiting

Proceedings Volume 2570, (1995) https://doi.org/10.1117/12.224156

KEYWORDS: X-rays, X-ray imaging, Calibration, Convolution, Laser scattering, Scattering, Interference (communication), Deconvolution, Superposition, Point spread functions

Read Abstract +

Proceedings Article | 12 May 1995 Paper

Motion-compensated signal and background estimation from coronary angiograms

Robert Close, James Whiting

Proceedings Volume 2434, (1995) https://doi.org/10.1117/12.208690

KEYWORDS: Image segmentation, Angiography, Arteries, Motion estimation, Motion models, Image enhancement, 3D modeling, Data modeling, Visualization, Physics

Read Abstract +

Proceedings Article | 8 July 1994 Paper

Automated motion estimation from M-mode echocardiograms

Robert Close, James Whiting, Jack Sklansky, Shinichi Tamura

Proceedings Volume 2299, (1994) https://doi.org/10.1117/12.179271

KEYWORDS: Motion estimation, Heart, Motion models, Fourier transforms, Detection and tracking algorithms, Medical imaging, Optical flow, Ultrasonography, Tissues, Light

Read Abstract +

Proceedings Article | 1 May 1994 Paper

Digital neuroangiography: an innovative application of PACS

George Hademenos, Daniel Valentino, Robert Close, Gary Duckwiler, Fernando Vinuela

Proceedings Volume 2164, (1994) https://doi.org/10.1117/12.174037

KEYWORDS: Picture Archiving and Communication System, Angiography, Blood circulation, Hemodynamics, Human-machine interfaces, Visualization, Image display, Cerebrovascular diseases, Image processing, Imaging systems

Read Abstract +

Proceedings Article | 14 September 1993 Paper

Computation of motion using generalized moment transformations

Robert Close, Shinichi Tamura, Hiroaki Naito, Koushi Harada, Takahiro Kozuka

Proceedings Volume 1898, (1993) https://doi.org/10.1117/12.154512

KEYWORDS: Medical imaging, Image processing, Magnetic resonance imaging, Heart, Optical flow, Blood circulation, Motion analysis, Motion measurement, Spatial frequencies, Diagnostics

Read Abstract +

Proceedings Article | 1 June 1991 Paper

Automatic 3-D reconstruction of vascular geometry from two orthogonal angiographic image sequences

Robert Close

Proceedings Volume 1445, (1991) https://doi.org/10.1117/12.45248

KEYWORDS: 3D image processing, Angiography, 3D image reconstruction, Image processing, Deconvolution, Digital imaging, Interference (communication), Reconstruction algorithms, Medicine, Yield improvement

Read Abstract +

Proceedings Article | 1 May 1991 Paper

Vascular parameters from angiographic images

Robert Close, Gary Duckwiler, Fernando Vinuela, Jacques Dion

Proceedings Volume 1444, (1991) https://doi.org/10.1117/12.45171

KEYWORDS: Angiography, Picture Archiving and Communication System, Algorithm development, Calibration, Computer networks, Data archive systems, Densitometry, Blood vessels, Tissues, Iodine

Read Abstract +

Proceedings Article | 1 July 1990 Paper

Neuroradiology therapeutic workstation

Robert Close, Gary Duckwiler, Fernando Vinuela, Jacques Dion, Joshua Abramowitz

Proceedings Volume 1233, (1990) https://doi.org/10.1117/12.18927

KEYWORDS: Image analysis, Blood, Image processing, Imaging systems, Blood circulation, Angiography, Magnetic resonance imaging, Software development, Visualization, Opacity

Read Abstract +

Showing 5 of 21 publications

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years