Journal ArticleDOI
Adaptive ultrasound imaging of the lumbar spine for guidance of epidural anesthesia.
TLDR
A significant improvement in quality is shown when using warping with adaptive median-based compounding, and linear prediction is used to find the warping vectors and decrease computational cost.About:
This article is published in Computerized Medical Imaging and Graphics.The article was published on 2009-12-01. It has received 11 citations till now. The article focuses on the topics: Image warping & Imaging phantom.read more
Citations
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Journal ArticleDOI
Eigenspace Based Minimum Variance Beamforming Applied to Ultrasound Imaging of Acoustically Hard Tissues
TL;DR: Forward/backward averaging is employed to improve the robustness of the MV beamforming techniques and an eigen-spaced minimum variance technique (ESMV) is used to enhance the edge detection of hard tissues to reduce noise and enhance edges in ultrasound images.
Journal ArticleDOI
Automatic Detection of Lumbar Anatomy in Ultrasound Images of Human Subjects
Denis Tran,Robert Rohling +1 more
TL;DR: The accuracy, reliability, and speed suggest this method may be valuable for helping guide epidurals in conjunction with the traditional loss-of-resistance method.
Journal ArticleDOI
Minimum variance beamforming applied to ultrasound imaging with a partially shaded aperture
TL;DR: It is shown that the minimum variance (MV) beamforming method can result in a distorted image when the imaging aperture is highly obstructed by the bone structure, and a modified MV beamformer can retain the resolution and compensate for the apparent lateral shifting and signal attenuation for the shadowed point scatterers.
Journal ArticleDOI
The effects of transducer geometry on artifacts common to diagnostic bone imaging with conventional medical ultrasound
TL;DR: This work indicates that off-axis reflections are a major source of ultrasound image artifacts, particularly in environments comprising specular reflecting (i.e., bone or bonelike) objects.
Journal ArticleDOI
Ultrasound diagnosis and therapeutic intervention in the spine.
Adil S. Ahmed,Raahul Ramakrishnan,Vignesh Ramachandran,Shyam S. Ramachandran,Kevin Phan,Erik L. Antonsen +5 more
TL;DR: A systematic review conducted via PubMed, MEDLINE, and Google Scholar identified 3,630 papers with eventual inclusion of 73 papers with an additional 21 papers supplemental papers subsequently added.
References
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Journal ArticleDOI
A Computational Approach to Edge Detection
TL;DR: There is a natural uncertainty principle between detection and localization performance, which are the two main goals, and with this principle a single operator shape is derived which is optimal at any scale.
Book
Vector Quantization and Signal Compression
Allen Gersho,Robert M. Gray +1 more
TL;DR: The author explains the design and implementation of the Levinson-Durbin Algorithm, which automates the very labor-intensive and therefore time-heavy and expensive process of designing and implementing a Quantizer.
Book
Digital Image Warping
TL;DR: This book is intended to be a practical guide for eclectic scientists and engineers who find themselves in need of implementing warping algorithms and comprehending the underlying concepts.
Digital Image Warping
TL;DR: In this paper, the authors focus on image reconstruction, real-time texture mapping, separable algorithms, two-pass transforms, mesh warping, and special effects, and discuss equations for spatial information, interpolation kernels, filtering problems, and fast-warping techniques based on scanline algorithms.
Journal ArticleDOI
Despeckling of medical ultrasound images
TL;DR: A simple preprocessing procedure is introduced, which modifies the acquired radio-frequency images, so that the noise in the log-transformation domain becomes very close in its behavior to a white Gaussian noise, which allows filtering methods based on assuming the noise to be white and Gaussian, to perform in nearly optimal conditions.