Focal beam distortion and treatment planning for transrib focused ultrasound thermal therapy: A feasibility study using a two-dimensional ultrasound phased array

2010 ◽  
Vol 37 (2) ◽  
pp. 848-860 ◽  
Author(s):  
Hao-Li Liu ◽  
Chia-Lung Hsu ◽  
Sheng-Min Huang ◽  
Yi-Wen Hsi
Keyword(s):  
Treatment Planning ◽  
Feasibility Study ◽  
Focused Ultrasound ◽  
Phased Array ◽  
Thermal Therapy ◽  
Two Dimensional

Design of Two-Dimensional Ultrasonic Phased Array Transducers

2005 ◽  
Vol 127 (3) ◽  
pp. 336-344 ◽  
Author(s):  
Shyamal C. Mondal ◽  
Paul D. Wilcox ◽  
Bruce W. Drinkwater
Keyword(s):  
Phased Array ◽  
Three Dimensional ◽  
Array Element ◽  
Two Dimensional ◽  
Circular Array ◽  
Single Location ◽  
Ultrasonic Phased Array ◽  
3D Point Spread Function ◽  
3D Volume ◽  
Simulation And Evaluation

Two-dimensional (2D) phased arrays have the potential to significantly change the way in which engineering components in safety critical industries are inspected. In addition to enabling a three-dimensional (3D) volume of a component to be inspected from a single location, they could also be used in a C-scan configuration. The latter would enable any point in a component to be interrogated over a range of solid angles, allowing more accurate defect characterization and sizing. This paper describes the simulation and evaluation of grid, cross and circular 2D phased array element configurations. The aim of the cross and circle configurations is to increase the effective aperture for a given number of elements. Due to the multitude of possible array element configurations a model, based on Huygens’ principle, has been developed to allow analysis and comparison of candidate array designs. In addition to the element configuration, key issues such as element size, spacing, and frequency are discussed and quantitatively compared using the volume of the 3D point spread function (PSF) as a measurand. The results of this modeling indicate that, for a given number of elements, a circular array performs best and that the element spacing should be less than half a wavelength to avoid grating lobes. A prototype circular array has been built and initial results are presented. These show that a flat bottomed hole, half a wavelength in diameter, can be imaged. Furthermore, it is shown that the volume of the 3D reflection obtained experimentally from the end of the hole compares well with the volume of the 3D PSF predicted for the array at that point.

MR Imaging-guided Focused Ultrasound Surgery of Fibroadenomas in the Breast: A Feasibility Study

Radiology ◽  
2001 ◽  
Vol 219 (1) ◽  
pp. 176-185 ◽  
Author(s):  
Kullervo Hynynen ◽  
Oliver Pomeroy ◽  
Darrell N. Smith ◽  
Peter E. Huber ◽  
Nathan J. McDannold ◽  
...  
Keyword(s):  
Mr Imaging ◽  
Feasibility Study ◽  
Focused Ultrasound ◽  
Ultrasound Surgery ◽  
Focused Ultrasound Surgery

scholarly journals Trans-cranial focused ultrasound without hair shaving: feasibility study in an ex vivo cadaver model

2013 ◽  
Vol 1 (1) ◽  
pp. 24 ◽  
Author(s):  
Matthew DC Eames ◽  
Arik Hananel ◽  
John W Snell ◽  
Neal F Kassell ◽  
Jean-Francois Aubry
Keyword(s):  
Feasibility Study ◽  
Focused Ultrasound ◽  
Ex Vivo

Fetal Occipital Encephalocele: A Case Report

2021 ◽  
pp. 875647932110668
Author(s):  
Amanda Hogan ◽  
Natalie Ullmer
Keyword(s):  
Case Report ◽  
Patient Care ◽  
Treatment Planning ◽  
Neural Tube ◽  
Neural Tube Defects ◽  
Three Dimensional ◽  
Improve Patient Care ◽  
Two Dimensional ◽  
Occipital Encephalocele ◽  
Improve Patient

Encephaloceles are considered neural tube defects, but their exact cause is unknown. The outcome is dismal, and essential management and counseling are needed for patients. Two-dimensional and three-dimensional sonography can be used to detect encephaloceles as early as 11 weeks, assist in treatment planning, and improve patient care. This case report presents an occipital encephalocele diagnosed by sonography and followed until delivery.

Sign in / Sign up

Export Citation Format

Share Document