Abstract：
BACKGROUND:Magneto-acoustic tomography with current injection involves using electrical impedance imaging technology. To explore the potential applications in imaging biological tissue and enhance image quality, a new scan mode for the transducer is proposed that is based on translational and circular scanning to record acoustic signals from sources. METHODS:An imaging algorithm to analyze these signals is developed in respect to this alternative scanning scheme. Numerical simulations and physical experiments were conducted to evaluate the effectiveness of this scheme. An experiment using a graphite sheet as a tissue-mimicking phantom medium was conducted to verify simulation results. A pulsed voltage signal was applied across the sample, and acoustic signals were recorded as the transducer performed stepped translational or circular scans. The imaging algorithm was used to obtain an acoustic-source image based on the signals. RESULTS:In simulations, the acoustic-source image is correlated with the conductivity at the sample boundaries of the sample, but image results change depending on distance and angular aspect of the transducer. In general, as angle and distance decreases, the image quality improves. Moreover, experimental data confirmed the correlation. CONCLUSION:The acoustic-source images resulting from the alternative scanning mode has yielded the outline of a phantom medium. This scan mode enables improvements to be made in the sensitivity of the detecting unit and a change to a transducer array that would improve the efficiency and accuracy of acoustic-source images.
journal_name
Biomed Eng Onlinejournal_title
Biomedical engineering onlineauthors
Wang S,Ma R,Zhang S,Yin T,Liu Zdoi
10.1186/s12938-016-0125-xsubject
Has Abstractpub_date
2016-01-27 00:00:00pages
10issn
1475-925Xpii
10.1186/s12938-016-0125-xjournal_volume
15pub_type
杂志文章abstract：BACKGROUND:Instrumented pendulum test is an objective and repeatable biomechanical method of assessment for spasticity. However, multitude of sensor technologies and plenty of suggested outcome measures, confuse those interested in implementing this method in practice. Lack of a standard agreement on the definition of ...
journal_title：Biomedical engineering online
pub_type： 杂志文章,评审
doi：10.1186/s12938-020-00826-8
更新日期：2020-11-09 00:00:00
abstract：BACKGROUND:Retina degenerative disorders represent the primary cause of blindness in UK and in the developed world. In particular, Age Related Macular Degeneration (AMD) and Retina Pigmentosa (RP) diseases are of interest to this study. We have therefore created new image processing algorithms for enhancing the visual ...
journal_title：Biomedical engineering online
pub_type： 杂志文章
doi：10.1186/1475-925X-9-27
更新日期：2010-06-18 00:00:00
abstract：BACKGROUND:Exercise has been found to either reduce or increase arterial stiffness. Land-based exercise modalities have been documented as effective physical therapies to decrease arterial stiffness. However, these land-based exercise modalities may not be suitable for overweight individuals, in terms of risks of joint...
journal_title：Biomedical engineering online
pub_type： 杂志文章
doi：10.1186/s12938-016-0274-y
更新日期：2016-12-28 00:00:00
abstract：BACKGROUND:In a typical electrophysiological experiment, especially one that includes studying animal behavior, the data collected normally contain spikes, local field potentials, behavioral responses and other associated data. In order to obtain informative results, the data must be analyzed simultaneously with the ex...
journal_title：Biomedical engineering online
pub_type： 杂志文章
doi：10.1186/s12938-017-0419-7
更新日期：2017-11-13 00:00:00
abstract：:It was highlighted that the original article [1] had an omission in the Abstract. This Correction article shows the omitted sentence: "This article [1] was awarded the SIAMOC Best Methodological Paper 2018". ...
journal_title：Biomedical engineering online
pub_type： 杂志文章,已发布勘误
doi：10.1186/s12938-019-0698-2
更新日期：2019-07-23 00:00:00
abstract：BACKGROUND:Pancreatic ductal adenocarcinoma (PDAC) is one of the most lethal tumors and usually presented with locally advanced and distant metastasis disease, which prevent curative resection or treatments. In this regard, we considered identifying molecular subtypes associated with clinicopathological factor as progn...
journal_title：Biomedical engineering online
pub_type： 杂志文章
doi：10.1186/1475-925X-13-S2-S5
更新日期：2014-01-01 00:00:00
abstract：BACKGROUND:Since the first well-known electrocardiogram (ECG) delineator based on Wavelet Transform (WT) presented by Li et al. in 1995, a significant research effort has been devoted to the exploitation of this promising method. Its ability to reliably delineate the major waveform components (mono- or bi-phasic P wave...
journal_title：Biomedical engineering online
pub_type： 杂志文章
doi：10.1186/1475-925X-10-23
更新日期：2011-04-03 00:00:00
abstract：BACKGROUND:This work deals with copyright protection of digital images, an issue that needs protection of intellectual property rights. It is an important issue with a large number of medical images interchanged on the Internet every day. So, it is a challenging task to ensure the integrity of received images as well a...
journal_title：Biomedical engineering online
pub_type： 杂志文章
doi：10.1186/s12938-015-0101-x
更新日期：2015-11-25 00:00:00
abstract：BACKGROUND:Mitral valve failure can require repair or replacement. Replacement bioprosthetic valves are treated with glutaraldehyde prior to implantation. The aim of this study was to determine the changes in mechanical properties following glutaraldehyde fixation of mitral valve chordae. METHODS:To investigate the im...
journal_title：Biomedical engineering online
pub_type： 杂志文章
doi：10.1186/s12938-018-0524-2
更新日期：2018-07-13 00:00:00
abstract：BACKGROUND:Electrochemotherapy (ECT) is a combined treatment in which high voltage electroporation (EP) pulses are used to facilitate the uptake of a chemotherapeutic drug into tumor cells, thus increasing antitumor effectiveness of the drug. The effect of ECT of deep-seated tumors located close to the heart on functio...
journal_title：Biomedical engineering online
pub_type： 杂志文章
doi：10.1186/1475-925X-14-S3-S5
更新日期：2015-01-01 00:00:00
abstract：BACKGROUND:The biomechanical simulation of the human respiratory system is expected to be a useful tool for the diagnosis and treatment of respiratory diseases. Because the deformation of the thorax significantly influences airflow in the lungs, we focused on simulating the thorax deformation by introducing contraction...
journal_title：Biomedical engineering online
pub_type： 杂志文章
doi：10.1186/s12938-016-0132-y
更新日期：2016-02-06 00:00:00
abstract：BACKGROUND:It is a known fact that blood flow pattern and more specifically the pulsatile time variation of shear stress on the vascular wall play a key role in atherogenesis. The paper presents the conception, the building and the control of a new in vitro test bench that mimics the pulsatile flows behavior based on i...
journal_title：Biomedical engineering online
pub_type： 杂志文章
doi：10.1186/s12938-015-0065-x
更新日期：2015-08-07 00:00:00
abstract：BACKGROUND:In order to reduce the radiation dose of CT (computed tomography), compressed sensing theory has been a hot topic since it provides the possibility of a high quality recovery from the sparse sampling data. Recently, the algorithm based on DL (dictionary learning) was developed to deal with the sparse CT reco...
journal_title：Biomedical engineering online
pub_type： 杂志文章
doi：10.1186/s12938-016-0193-y
更新日期：2016-06-18 00:00:00
abstract：BACKGROUND:Surface electromyographic (S-EMG) signal processing has been emerging in the past few years due to its non-invasive assessment of muscle function and structure and because of the fast growing rate of digital technology which brings about new solutions and applications. Factors such as sampling rate, quantiza...
journal_title：Biomedical engineering online
pub_type： 杂志文章
doi：10.1186/1475-925X-13-22
更新日期：2014-02-27 00:00:00
abstract：BACKGROUND:Fiber-based optical spectroscopy has been widely used for biomedical applications. However, the effect of probe-sample distance on the collection efficiency has not been well investigated. METHOD:In this paper, we presented a theoretical model to maximize the illumination and collection efficiency in design...
journal_title：Biomedical engineering online
pub_type： 杂志文章
doi：10.1186/1475-925X-10-95
更新日期：2011-11-02 00:00:00
abstract：BACKGROUND:The pupillary light reflex characterizes the direct and consensual response of the eye to the perceived brightness of a stimulus. It has been used as indicator of both neurological and optic nerve pathologies. As with other eye reflexes, this reflex constitutes an almost instantaneous movement and is linked ...
journal_title：Biomedical engineering online
pub_type： 杂志文章
doi：10.1186/s12938-015-0016-6
更新日期：2015-03-13 00:00:00
abstract：BACKGROUND:Red blood cells (RBCs) deform significantly and repeatedly when passing through narrow capillaries and delivering dioxygen throughout the body. Deformability of RBCs is a key characteristic, largely governed by the mechanical properties of the cell membrane. This study investigated RBC mechanical properties ...
journal_title：Biomedical engineering online
pub_type： 杂志文章
doi：10.1186/s12938-017-0429-5
更新日期：2017-12-19 00:00:00
abstract：BACKGROUND:Image quality assessment method of photoacoustic tomography has not been completely standardized yet. Due to the combined nature of photonic signal generation and ultrasonic signal transmission in biological tissue, neither optical nor ultrasonic traditional methods can be used without modification. An optic...
journal_title：Biomedical engineering online
pub_type： 杂志文章
doi：10.1186/1475-925X-11-37
更新日期：2012-07-13 00:00:00
abstract：BACKGROUND:Pre-operative imaging devices generate high-resolution images but intra-operative imaging devices generate low-resolution images. To use high-resolution pre-operative images during surgery, they must be deformed to reflect intra-operative geometry of brain. METHODS:We employ biomechanical models, guided by ...
journal_title：Biomedical engineering online
pub_type： 杂志文章
doi：10.1186/1475-925X-9-51
更新日期：2010-09-15 00:00:00
abstract：BACKGROUND:Assessing hand injury is of great interest given the level of involvement of the hand with the environment. Knowing different assessment systems and their limitations generates new perspectives. The integration of digital systems (accelerometry and electromyography) as a tool to supplement functional assessm...
journal_title：Biomedical engineering online
pub_type： 杂志文章
doi：10.1186/1475-925X-13-161
更新日期：2014-12-11 00:00:00
abstract：BACKGROUND:Many studies have demonstrated that the geometry of the carotid bifurcation enables prediction of blood flow variation associated with atherosclerotic plaque formation. The phase angle between the arterial wall circumferential strain and its instantaneous wall shear stress is known as stress phase angle (SPA...
journal_title：Biomedical engineering online
pub_type： 杂志文章
doi：10.1186/s12938-018-0458-8
更新日期：2018-03-02 00:00:00
abstract：BACKGROUND:Parkinson's disease (PD) and essential tremor (ET) are the two most common movement disorders but the rate of misdiagnosis rate in these disorders is high due to similar characteristics of tremor. The purpose of the study is to present: (a) a solution to identify PD and ET patients by using the novel measure...
journal_title：Biomedical engineering online
pub_type： 杂志文章
doi：10.1186/s12938-015-0098-1
更新日期：2015-11-04 00:00:00
abstract：INTRODUCTION:This paper shows the influence of a measurement method of features in the diagnosis of Hashimoto's disease. Sensitivity of the algorithm to changes in the parameters of the ROI, namely shift, resizing and rotation, has been presented. The obtained results were also compared to the methods known from the li...
journal_title：Biomedical engineering online
pub_type： 杂志文章
doi：10.1186/1475-925X-11-91
更新日期：2012-11-28 00:00:00
abstract：BACKGROUND:Segmentation is the most crucial part in the computer-aided bone age assessment. A well-known type of segmentation performed in the system is adaptive segmentation. While providing better result than global thresholding method, the adaptive segmentation produces a lot of unwanted noise that could affect the ...
journal_title：Biomedical engineering online
pub_type： 杂志文章
doi：10.1186/1475-925X-10-87
更新日期：2011-09-28 00:00:00
abstract：INTRODUCTION:This paper concerns the analysis of the features obtained from thyroid ultrasound images in left and right transverse and longitudinal sections. In the image analysis, the thyroid lobe is treated as a texture for healthy subjects and patients with Hashimoto's disease. The applied methods of analysis and im...
journal_title：Biomedical engineering online
pub_type： 杂志文章
doi：10.1186/1475-925X-11-48
更新日期：2012-08-16 00:00:00
abstract：BACKGROUND:Peripheral ECMO is an effective cardiopulmonary support in clinical. The perfusion level could directly influence the performances and complications. However, there are few studies on the effects of the perfusion level on hemodynamics of peripheral ECMO. METHODS:The geometric model of cardiovascular system ...
journal_title：Biomedical engineering online
pub_type： 杂志文章
doi：10.1186/s12938-018-0493-5
更新日期：2018-05-09 00:00:00
abstract：BACKGROUND:To determine how the mechanical property and micro structure affect tissue regeneration and angiogenesis, three types of scaffolds were studied. Acellular dermal matrices (ADM), produced from human skin by removing the epidermis and cells, has been widely used in wound healing because of its high mechanical ...
journal_title：Biomedical engineering online
pub_type： 杂志文章
doi：10.1186/1475-925X-12-125
更新日期：2013-12-04 00:00:00
abstract：BACKGROUND:We sought to compare uterine cervical electrical impedance spectroscopy measurements employing two probes of different sizes, and to employ a finite element model to predict and compare the fraction of electrical current derived from subepithelial stromal tissue. METHODS:Cervical impedance was measured in 1...
journal_title：Biomedical engineering online
pub_type： 临床试验,杂志文章
doi：10.1186/1475-925X-5-62
更新日期：2006-11-24 00:00:00
abstract：BACKGROUND:The challenges of glycaemic control in critically ill patients have been debated for 20 years. While glycaemic control shows benefits inter- and intra-patient metabolic variability results in increased hypoglycaemia and glycaemic variability, both increasing morbidity and mortality. Hence, current recommenda...
journal_title：Biomedical engineering online
pub_type： 杂志文章
doi：10.1186/s12938-019-0720-8
更新日期：2019-10-22 00:00:00
abstract：BACKGROUND:Phase contrast magnetic resonance imaging (PC-MRI) is used clinically for quantitative assessment of cardiovascular flow and function, as it is capable of providing directly-measured 3D velocity maps. Alternatively, vascular flow can be estimated from model-based computation fluid dynamics (CFD) calculations...
journal_title：Biomedical engineering online
pub_type： 杂志文章
doi：10.1186/s12938-015-0104-7
更新日期：2015-11-26 00:00:00
