Search Results - "Robinson, Brent S."

Spatial coherence of the nonlinearly generated second harmonic portion of backscatter for a clinical imaging system by Fedewa, R.J., Wallace, K.D., Holland, M.R., Jago, J.R., Ng, G.C., Rielly, M.R., Robinson, B.S., Miller, J.G.

“…Correlation-based approaches to phase aberration correction rely on the spatial coherence of backscattered signals. The spatial coherence of backscatter from…”
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Impact of propagation through an aberrating medium on the linear effective apodization of a nonlinearly generated second harmonic field by Wallace, Kirk D., Holland, Mark R., Robinson, Brent S., Fedewa, Russell J., Lloyd, Christopher W., Miller, James G.

“…Techniques based on the nonlinearly generated second harmonic signal (tissue harmonic imaging) have rapidly supplanted linear (fundamental) imaging methods as…”
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On the stability of the effective apodization of the nonlinearly generated second harmonic with respect to range by FEDEWA, Russell J, WALLACE, Kirk D, HOLLAND, Mark R, JAGO, James R, NG, Gary C, ROBINSON, Brent S, RIELLY, Matthew R, MILLER, James G

“…The concept of an effective apodization was introduced to describe the field pattern for the nonlinearly generated second harmonic (2f) within the focal zone…”
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Spatial coherence of backscatter for the nonlinearly produced second harmonic for specific transmit apodizations by Fedewa, R.J., Wallace, K.D., Holland, M.R., Jago, J.R., Ng, G.C., Rielly, M.R., Robinson, B.S., Miller, J.G.

“…To be successful, correlation-based, phase-aberration correction requires a high correlation among backscattered signals. For harmonic imaging, the spatial…”
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Synthetically focused ultrasonic diagnostic imaging system for tissue and flow imaging by Robinson, Brent S.

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The scattering of ultrasound by cylinders: implications for diffraction tomography by ROBINSON, B. S, GREENLEAF, J. F

“…The validity of wave equations employed as system models in acoustical diffraction tomography is investigated using simulations and measurements of the…”
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Statistically significant differences in the spatial coherence of backscatter for fundamental and harmonic portions of a clinical beam by Fedewa, R.J., Wallace, K.D., Holland, M.R., Jago, J.R., Ng, G.C., Rielly, M.R., Robinson, B.S., Miller, J.G.

“…Correlation-based approaches to phase aberration correction rely on the spatial coherence of backscattered signals. The spatial coherence of backscatter was…”
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Measurements of the spatial coherence of the fundamental and second-harmonic beams for a clinical imaging system by Fedewa, Russell J., Wallace, Kirk D., Holland, Mark R., Jago, James R., Ng, Gary C., Rielly, Matthew R., Robinson, Brent S., Miller, James G.

“…Spatial coherence of backscattered signals underlies correlation-based phase aberration corrections. The van Cittert–Zernike theorem relates…”
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Factors affecting image quality and diagnostic efficacy in abdominal sonography: a prospective study of 140 patients by Shmulewitz, A, Teefey, S A, Robinson, B S

“…A study was undertaken to evaluate the limitations of abdominal sonography in a group of predominantly elderly patients. In the majority of patients (98%)…”
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Experimental comparisons of the impact of abdominal wall aberrators on linear and nonlinear beam patterns by Wallace, K.D., Robinson, B.S., Holland, M.R., Rielly, M.R., Miller, J.G.

“…An ultrasonic wavefront can suffer significant aberration as it passes through the abdominal or chest wall. The present work experimentally measures the impact…”
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Echocardiographic visualization of acute myocardial ischemia--in vitro study by Chandrasekaran, K, Greenleaf, J F, Robinson, B S, Edwards, W D, Seward, J B, Tajik, A J

“…To evaluate whether myocardial texture changes resulting from acute ischemia can be visualized with satisfactory spatial resolution, short axis compound echo…”
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Measurements comparing the linearly propagated field using an effective apodization and the nonlinearly generated second harmonic field by Wallace, K.D., Fedewa, R.J., Holland, M.R., Ng, G.C., Robinson, B.S., Jago, J.R., Rielly, M., Miller, J.G.

“…We have previously introduced the concept of an "effective apodization" as a linear description of the nonlinearly generated harmonic components of a finite…”
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Effect of changing the transmit aperture on the spatial coherence of backscatter for the nonlinearly generated second harmonic by Fedewa, R.J., Wallace, K.D., Holland, M.R., Jago, J.R., Ng, G.C., Rielly, M.R., Robinson, B.S., Miller, J.G.

“…The present work measures the effective apodizations for the fundamental and second harmonic and uses the Van Cittert-Zernike theorem to predict the spatial…”
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