Abstract：
OBJECTIVES:This paper aims to apply median filters for reducing interpolation error and improving the quality of 3D images in a freehand 3D ultrasound (US) system. BACKGROUND AND MOTIVATION:Freehand 3D US imaging has been playing an important role in obtaining the entire 3D impression of tissues and organs. Reconstructing a sequence of irregularly located 2D US images (B-scans) into a 3D data set is one of the key procedures for visualization and data analysis. METHODS:In this study, we investigated the feasibility of using median filters for the reconstruction of 3D images in a freehand 3D US system. The B-scans were collected using a 7.5 MHz ultrasound probe. Four algorithms including the standard median (SM), Gaussian weighted median (GWM) and two types of distance-weighted median (DWM) filters were proposed to filter noises and compute voxel intensities. Qualitative and quantitative comparisons were made among the results of different methods based on the image set captured in freehand from the forearm of a healthy subject. A leave-one-out approach was used to demonstrate the performance of the median filters for predicting the removed B-scan pixels. RESULTS:Compared with the voxel nearest-neighbourhood (VNN) and distance-weighted (DW) interpolation methods, the four median filters reduced the interpolation error by 8.0-24.0% and 1.2-21.8%, respectively, when 1/4 to 5 B-scans was removed from the raw B-scan sequence. CONCLUSIONS:In summary, the median filters can improve the quality of volume reconstruction by reducing the interpolation errors and facilitate the following image analyses in clinical applications.
journal_name
Ultrasonicsjournal_title
Ultrasonicsauthors
Huang QH,Zheng YPdoi
10.1016/j.ultras.2007.11.005subject
Has Abstractpub_date
2008-07-01 00:00:00pages
182-92issue
3eissn
0041-624Xissn
1874-9968pii
S0041-624X(07)00128-Xjournal_volume
48pub_type
杂志文章相关文献
ULTRASONICS文献大全abstract：:Thrombosis is an extremely critical clinical condition where a clot forms inside a blood vessel which blocks the blood flow through the cardiovascular system. Previous sonothrombolysis methods using ultrasound and microbubbles (MBs) often have a relatively low lysis rate due to the low microbubbles concentration at cl...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2019.06.004
更新日期：2019-09-01 00:00:00
abstract：:This paper describes an optimization method of the top electrode size for a thin film matrix ultrasonic transducer (M-UT) in the frequency range above 200 MHz. The goal of this work is to design an optimal top electrode size for an M-UT providing the maximal output peak-peak voltage (V(PP)) and the maximal signal-to-n...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2012.10.018
更新日期：2013-03-01 00:00:00
abstract：:The correlation between ultrasonic wave propagation and polycrystalline microstructures has significant implications in nondestructive evaluation. An original numerical approach using the finite element method to quantify in both time and frequency domains the ultrasonic noise scattering due to the elastic heterogenei...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2018.02.008
更新日期：2018-07-01 00:00:00
abstract：:Molecular techniques are transforming our understanding of cellular function and disease. However, accurate molecular analysis methods will be limited if the input DNA, RNA, or protein is not derived from pure population of cells or is contaminated by the wrong cells. A novel Ultrasonic Vibration Micro-dissection (UVM...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2006.06.010
更新日期：2006-12-22 00:00:00
abstract：:The propagation of non-axisymmetric guided waves in larger diameter pipes is studied in this paper by treating the guided waves as corresponding Lamb waves in an unwrapped plate. This approximation leads to a simpler method for calculating the phase velocities of hollow cylinder guided waves, which reveals a beam focu...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2005.07.002
更新日期：2006-01-01 00:00:00
abstract：:A new type of optical fiber hydrophone is constructed with a fiber Bragg grating (FBG) based on the intensity modulation of laser light in an FBG under the influence of sound pressure. The FBG hydrophone shows linearity, with dynamic range about 70 dB. It can measure amplitude and phase of an acoustic field in real ti...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/s0041-624x(99)00105-5
更新日期：2000-03-01 00:00:00
abstract：:In practical cardiology, a stethoscope based auscultation has been used to reveal the patient's clinical status. Recently, several hand-held echo devices are going on market and they are expected to play a role as "visible" auscultation instead of stethoscope. We have developed a portable and inexpensive echo device w...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2003.11.009
更新日期：2004-04-01 00:00:00
abstract：:A coordinated theoretical, numerical and experimental study is carried out in an effort to interpret the characteristics of propagating guided Lamb wave modes in presence of a high-density (HD) core region in a honeycomb composite sandwich structure (HCSS). Initially, a two-dimensional (2D) semi-analytical model based...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2016.05.025
更新日期：2016-09-01 00:00:00
abstract：:A single-mode linear ultrasonic motor was developed in this study. On the stator, a group of four pieces of piezoelectric ceramics PZT8 were utilized to generate the ultrasonic vibration. A specially designed modal conversion horn with an oblique beam was applied to transfer the longitudinal vibration to an additional...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2020.106216
更新日期：2020-12-01 00:00:00
abstract：:Acoustic scattering phenomena from complex immersed elastic shells are studied by high-speed Schlieren visualization for spark-generated spherical quasi-Dirac excitations. The situations considered are air-filled cylindrical shells under normal insonification and air-filled cylindrical shells soldered at one end with ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/s0041-624x(99)00165-1
更新日期：2000-03-01 00:00:00
abstract：:Experimental results of ultrasound of varying frequency (0.8-5.0 MHz) propagating in cold drawn wires of stainless steel and aluminium ranging in diameter from 0.25 to 1.21 mm are in close agreement with theoretical predictions. This agreement is maintained when the coupling medium between the wire and the ultrasound ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/0041-624x(89)90021-8
更新日期：1989-03-01 00:00:00
abstract：:Laser ultrasonic is a most promising method for non-destructive evaluation of residual stress. The residual stress of thin steel plate is measured by laser ultrasonic technique. The pre-stress loading device is designed which can easily realize the condition of the specimen being laser ultrasonic tested at the same ti...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2016.08.013
更新日期：2017-01-01 00:00:00
abstract：:This work is concerned with the reconstruction, from measured (synthetic or real) data, of a 2D penetrable fluid-like object of arbitrary cross-section embedded in a fluid of infinite extent and insonified by a plane acoustic wave. Green's theorem is used to provide a domain integral representation of the scattered fi...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/s0041-624x(00)00054-8
更新日期：2001-03-01 00:00:00
abstract：:When casting ceramic items in potteries, liquid 'slip' is passed from a settling tank, through overhead pipelines, before being pumped manually into the moulds. It is not uncommon for bubbles to be introduced into the slip as it passes through the complex piping network, and indeed the presence of bubbles is a major s...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2009.07.008
更新日期：2010-01-01 00:00:00
abstract：:Signal modeling has been proven to be an useful tool to characterize damaged materials under ultrasonic nondestructive evaluation (NDE). In this paper, we introduce a novel digital signal model for ultrasonic NDE of multilayered materials. This model borrows concepts from lattice filter theory, and bridges them to the...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2015.05.013
更新日期：2015-09-01 00:00:00
abstract：:Ultrasound image guided brain surgery (UGBS) requires an automatic and fast image segmentation method. The level-set and active contour based algorithms have been found to be useful for obtaining topology-independent boundaries between different image regions. But slow convergence limits their use in online US image s...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2020.106304
更新日期：2021-03-01 00:00:00
abstract：:Experimental studies of thermal effects in high-intensity focused ultrasound (HIFU) procedures are often performed with the aid of fine wire thermocouples positioned within tissue phantoms. Thermocouple measurements are subject to several types of error which must be accounted for before reliable inferences can be mad...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2010.07.007
更新日期：2011-02-01 00:00:00
abstract：:The wear behaviors of grinding wheel have significant influence on the work-surface topography. However, a comprehensive and quantitative method is lacking for evaluating the wear conditions of grinding wheel. In this paper, a fractal analysis method is used to investigate the wear behavior of resin-bonded diamond whe...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2017.10.012
更新日期：2018-03-01 00:00:00
abstract：:This paper presents the influence of ultrasonic beam ray refraction effect on the internal object structure imaging using the ultrasound transmission tomography method (UTT), in parallel ray projection geometry, for ultrasonic pulse run-time measurements. Simulation calculations carried out using specially elaborated ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/s0041-624x(99)00137-7
更新日期：2000-03-01 00:00:00
abstract：:Ultrasonic standing wave chambers with acoustic pathlengths of 1.1 and 0.62 mm have been constructed. The chambers were driven at frequencies over the range 0.66-12.2 MHz. The behaviour of 2 microns diameter latex microparticles and 5 microns diameter yeast in the chambers has been elucidated. One (flow) chamber had a...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/s0041-624x(98)00019-5
更新日期：1998-08-01 00:00:00
abstract：:In this paper, an experimental study of the effect of the resonator shape on the performance of a traveling-wave thermoacoustic engine is presented. Two different resonators were tested in the thermoacoustic-Stirling heat. One resonator is an iso-diameter one, and the other is a tapered one. To have a reasonable compa...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2006.08.008
更新日期：2006-12-22 00:00:00
abstract：:Guided waves propagating in cylindrical tubes are frequently applied for the characterization of material or geometrical properties of tubes. In a tube, guided waves can propagate in the axial direction and called axial guided waves, or in the circumferential direction called circumferential guided waves. Dispersion s...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2010.11.013
更新日期：2011-05-01 00:00:00
abstract：:Broken wires often occur at multiple locations in the same wire of a strand due to the recovery length, which is defined as the length of the wire taking up its full share of the axial load from the break point. The detection of broken-wire flaws at multiple locations along the same wire is investigated using guided w...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2012.05.003
更新日期：2013-01-01 00:00:00
abstract：:An ultrasonic backscattering model is developed for textured polycrystalline materials with orthotropic or trigonal grains of ellipsoidal shape. The model allows us to simulate realistic microstructures and orthotropic macroscopic material textures resulting from thermomechanical processing for a broad variety of mate...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2014.02.020
更新日期：2014-09-01 00:00:00
abstract：:Theoretical formulation for the problem of second harmonic guided waves in pipes is presented from the principles of continuum mechanics. The formulation is carried out in the reference configuration of the pipe with an emphasis on the correct use of the "Divergence" operator in the reference configuration. Second har...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2012.12.007
更新日期：2013-04-01 00:00:00
abstract：:In previous work, we have demonstrated the use of single-holed Armoured Microbubbles (AMBs) for microfluidic mixing and self-propulsion. AMBs are hollow partial spheres, inside which we capture a bubble. Under ultrasound, the bubble oscillates, generating a streaming flow with velocities of 1-100 mm/s in water. In thi...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2019.106054
更新日期：2020-03-01 00:00:00
abstract：:This paper investigates the dependence of ultrasonic velocity in rabbit liver on the water content and tissue structure. The results obtained indicate that the composition and water content of the liver tissue but not its structure determine the value of velocity. ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/0041-624x(87)90040-0
更新日期：1987-07-01 00:00:00
abstract：:In the food industry, ultrasonic cutting is used to improve separation by a reduction of the cutting force. This reduction can be attributed to the modification of tool-workpiece interactions at the cutting edge and along the tool flanks because of the superposition of the cutting movement with ultrasonic vibration of...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2009.03.001
更新日期：2009-06-01 00:00:00
abstract：:The present study investigated the effect of geometric parameters of the ultrasound instrument during meat salting in order to enhance salt diffusion and salt distribution in pork meat on a lab scale. The effects of probe size (∅2.5 and 1.3cm) and of different distances between the transducer and the meat sample (0.3,...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2017.03.017
更新日期：2018-02-01 00:00:00
abstract：:A mathematical model is developed and presented to capture the effect of viscoelastic nature of a material on modulated ultrasound (US) pulses. The model is established by considering perturbation of material elements subject to modulated US pulses and by introducing the exponential relaxation of the perturbed fluid e...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2014.05.014
更新日期：2014-09-01 00:00:00
