99 results match your criteria Biomedical engineering letters[Journal]


Correction to: Thermometry and interpretation of body temperature.

Authors:
Wenxi Chen

Biomed Eng Lett 2019 Feb 25;9(1):19. Epub 2019 Feb 25.

Biomedical Information Technology Laboratory, Research Center for Advanced Information Science and Technology, The University of Aizu, Aizu-Wakamatsu, Fukushima, Japan.

[This corrects the article DOI: 10.1007/s13534-019-00102-2.]. Read More

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http://dx.doi.org/10.1007/s13534-019-00104-0DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6431331PMC
February 2019

Efficient QRS complex detection algorithm based on Fast Fourier Transform.

Biomed Eng Lett 2019 Feb 25;9(1):145-151. Epub 2018 Oct 25.

Department of Electronics and Communication Engineering, Bennett University, Greater Noida, UP 201310 India.

An ECG signal, generally filled with noise, when de-noised, enables a physician to effectively determine and predict the condition and health of the heart. This paper aims to address the issue of denoising a noisy ECG signal using the Fast Fourier Transform based bandpass filter. Multi-stage adaptive peak detection is then applied to identify the R-peak in the QRS complex of the ECG signal. Read More

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http://dx.doi.org/10.1007/s13534-018-0087-yDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6431324PMC
February 2019

Adaptive smith predictor controller for total intravenous anesthesia automation.

Biomed Eng Lett 2019 Feb 11;9(1):127-144. Epub 2018 Dec 11.

U. N. Mehta Institute of Cardiology and Research, Ahmedabad, India.

Anesthetic agent propofol needs to be administered at an appropriate rate to prevent hypotension and postoperative adverse reactions. To comprehend more suitable anesthetic drug rate during surgery is a crucial aspect. The main objective of this proposal is to design robust automated control system that work efficiently in most of the patients with smooth BIS and minimum variations of propofol during surgery to avoid adverse post reactions and instability of anesthetic parameters. Read More

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http://dx.doi.org/10.1007/s13534-018-0090-3DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6431314PMC
February 2019

A universal ultrasound diagnostic system developed to support urology and coloproctological applications.

Biomed Eng Lett 2019 Feb 15;9(1):119-125. Epub 2018 Nov 15.

4Department of Radiology and Radiation Medicine, Seoul National University College of Medicine, Seoul, Korea.

In this study, we sought to describe a novel imaging apparatus that is lightweight, inexpensive, and highly effective for use in colorectal diagnostic and treatment settings. Typical probes for use in colorectal ultrasonic imaging applications are developed for surgeons to diagnose and stage rectal tumors and image the rectum and anus. Here we outline a new technique and use it for colorectal imaging in an animal. Read More

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http://dx.doi.org/10.1007/s13534-018-0088-xDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6431337PMC
February 2019

Segmentation of lung fields from chest radiographs-a radiomic feature-based approach.

Biomed Eng Lett 2019 Feb 17;9(1):109-117. Epub 2018 Oct 17.

2Department of Computer Science and Engineering, Punjab Engineering College, Chandigarh, India.

Precisely segmented lung fields restrict the region-of-interest from which radiological patterns are searched, and is thus an indispensable prerequisite step in any chest radiographic CADx system. Recently, a number of deep learning-based approaches have been proposed to implement this step. However, deep learning has its own limitations and cannot be used in resource-constrained settings. Read More

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http://dx.doi.org/10.1007/s13534-018-0086-zDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6431340PMC
February 2019

Additive manufacturing to veterinary practice: recovery of bony defects after the osteosarcoma resection in canines.

Biomed Eng Lett 2019 Feb 4;9(1):97-108. Epub 2019 Jan 4.

5Sports Tech Research Centre, Mid Sweden University, Akademigatan 1, Östersund, Sweden.

The paper outlines the achievements and challenges in the additive manufacturing (AM) application to veterinary practice. The state-of-the-art in AM application to the veterinary surgery is presented, with the focus of AM for patient-specific implants manufacturing. It also provides critical discussion on some of the potential issues design and technology should overcome for wider and more effective implementation of additively manufactured parts in veterinary practices. Read More

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http://dx.doi.org/10.1007/s13534-018-00092-7DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6431339PMC
February 2019

Practicality and importance of selected endothelial dysfunction measurement techniques: review.

Biomed Eng Lett 2019 Feb 30;9(1):87-95. Epub 2018 Nov 30.

2School of Integrated Studies, Kansas State University, Polytechnic Campus, Salina, KS 67401 USA.

The measurement of endothelial dysfunction (ED) has importance in that it indicates the presence of coronary artery disease (Kuvin et al. in J Am Coll Cardiol 38(7):1843-1849, 2001) in addition to acting as a predictor of future adverse events (Halcox et al. in Circulation 106:653-658, 2002). Read More

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http://dx.doi.org/10.1007/s13534-018-0089-9DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6431325PMC
February 2019

Smart technologies toward sleep monitoring at home.

Biomed Eng Lett 2019 Feb 11;9(1):73-85. Epub 2019 Jan 11.

2Interdisciplinary Program in Bioengineering, Seoul National University, Seoul, 08826 Korea.

With progress in sensors and communication technologies, the range of sleep monitoring is extending from professional clinics into our usual home environments. Information from conventional overnight polysomnographic recordings can be derived from much simpler devices and methods. The gold standard of sleep monitoring is laboratory polysomnography, which classifies brain states based mainly on EEGs. Read More

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http://dx.doi.org/10.1007/s13534-018-0091-2DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6431329PMC
February 2019
6 Reads

Wearable EEG and beyond.

Biomed Eng Lett 2019 Feb 4;9(1):53-71. Epub 2019 Jan 4.

School of Electrical and Electronic Engineering, The University of Manchester, Manchester, UK.

The electroencephalogram (EEG) is a widely used non-invasive method for monitoring the brain. It is based upon placing conductive electrodes on the scalp which measure the small electrical potentials that arise outside of the head due to neuronal action within the brain. Historically this has been a large and bulky technology, restricted to the monitoring of subjects in a lab or clinic while they are stationary. Read More

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http://dx.doi.org/10.1007/s13534-018-00093-6DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6431319PMC
February 2019

Pulse transit time technique for cuffless unobtrusive blood pressure measurement: from theory to algorithm.

Biomed Eng Lett 2019 Feb 18;9(1):37-52. Epub 2019 Feb 18.

2Department of Biomedical Engineering, City University of Hong Kong, Hong Kong, China.

Cuffless technique holds great promise to measure blood pressure (BP) in an unobtrusive way, improving diagnostics and monitoring of hypertension and its related cardiovascular diseases, and maximizing the independence and participation of individual. Pulse transit time (PTT) has been the most commonly employed techniques for cuffless BP estimation. Many studies have been conducted to explore its feasibility and validate its performance in the clinical settings. Read More

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http://dx.doi.org/10.1007/s13534-019-00096-xDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6431352PMC
February 2019

Current progress of photoplethysmography and SPO for health monitoring.

Authors:
Toshiyo Tamura

Biomed Eng Lett 2019 Feb 18;9(1):21-36. Epub 2019 Feb 18.

Future Robotics Institute, Wadeda University, Tokyo, Japan.

A photoplethysmograph (PPG) is a simple medical device for monitoring blood flow and transportation of substances in the blood. It consists of a light source and a photodetector for measuring transmitted and reflected light signals. Clinically, PPGs are used to monitor the pulse rate, oxygen saturation, blood pressure, and blood vessel stiffness. Read More

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http://dx.doi.org/10.1007/s13534-019-00097-wDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6431353PMC
February 2019
1 Read

Thermometry and interpretation of body temperature.

Authors:
Wenxi Chen

Biomed Eng Lett 2019 Feb 9;9(1):3-17. Epub 2019 Feb 9.

Biomedical Information Technology Laboratory, Research Center for Advanced Information Science and Technology, The University of Aizu, Aizu-Wakamatsu, Fukushima, Japan.

This article reviews the historical development and up-to-date state of thermometric technologies for measuring human body temperature (BT) from two aspects: measurement methodology and significance interpretation. Since the first systematic and comprehensive study on BT and its relation to human diseases was conducted by Wunderlich in the late 19th century, BT has served as one of the most fundamental vital signs for clinical diagnosis and daily healthcare. The physiological implication of BT set point and thermoregulatory mechanisms are briefly outlined. Read More

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http://dx.doi.org/10.1007/s13534-019-00102-2DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6431316PMC
February 2019

Ubiquitous healthcare monitoring.

Biomed Eng Lett 2019 Feb 13;9(1):1-2. Epub 2019 Feb 13.

4Future Robotics Organization, Waseda University, Tokyo, 169-8050 Japan.

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http://dx.doi.org/10.1007/s13534-019-00099-8DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6431335PMC
February 2019

Validation of the mobile wireless digital automatic blood pressure monitor using the cuff pressure oscillometric method, for clinical use and self-management, according to international protocols.

Biomed Eng Lett 2018 Nov 21;8(4):399-404. Epub 2018 Sep 21.

2Medical Device Research and Development Center, Seoul National University Bundang Hospital, Seongnam, South Korea.

The purpose of this study was to evaluate the accuracy of a mobile wireless digital automatic blood pressure monitor for clinical use and mobile health (mHealth). In this study, a manual sphygmomanometer and a digital blood pressure monitor were tested in 100 participants in a repetitive and sequential manner to measure blood pressure. The guidelines for measurement used the Korea Food & Drug Administration protocol, which reflects international standards, such as the American National Standard Institution/Association for the Advancement of Medical Instrumentation SP 10: 1992 and the British Hypertension Society protocol. Read More

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http://dx.doi.org/10.1007/s13534-018-0085-0DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6209082PMC
November 2018
2 Reads

Promotion of excisional wound repair by a menstrual blood-derived stem cell-seeded decellularized human amniotic membrane.

Biomed Eng Lett 2018 Nov 11;8(4):393-398. Epub 2018 Sep 11.

4Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.

This is the first study demonstrating the efficacy of menstrual blood-derived stem cell (MenSC) transplantation via decellularized human amniotic membrane (DAM), for the promotion of skin excisional wound repair. The DAM was seeded with MenSCs at the density of 3 × 10 cells/cm and implanted onto a rat's 1.50 × 1. Read More

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http://link.springer.com/10.1007/s13534-018-0084-1
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http://dx.doi.org/10.1007/s13534-018-0084-1DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6209087PMC
November 2018
7 Reads

Analytic simulator and image generator of multiple-scattering Compton camera for prompt gamma ray imaging.

Authors:
Soo Mee Kim

Biomed Eng Lett 2018 Nov 10;8(4):383-392. Epub 2018 Sep 10.

Maritime ICT R&D Center, Korea Institute of Ocean Science and Technology, 385 Haeyang-ro, Yeondo-gu, Busan, 49111 Korea.

For prompt gamma ray imaging for biomedical applications and environmental radiation monitoring, we propose herein a multiple-scattering Compton camera (MSCC). MSCC consists of three or more semiconductor layers with good energy resolution, and has potential for simultaneous detection and differentiation of multiple radio-isotopes based on the measured energies, as well as three-dimensional (3D) imaging of the radio-isotope distribution. In this study, we developed an analytic simulator and a 3D image generator for a MSCC, including the physical models of the radiation source emission and detection processes that can be utilized for geometry and performance prediction prior to the construction of a real system. Read More

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http://dx.doi.org/10.1007/s13534-018-0083-2DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6209085PMC
November 2018

The earth mover's distance and Bayesian linear discriminant analysis for epileptic seizure detection in scalp EEG.

Biomed Eng Lett 2018 Nov 11;8(4):373-382. Epub 2018 Aug 11.

3Department of Information Engineering, Binzhou University, Binzhou, 256600 People's Republic of China.

Since epileptic seizure is unpredictable and paroxysmal, an automatic system for seizure detecting could be of great significance and assistance to patients and medical staff. In this paper, a novel method is proposed for multichannel patient-specific seizure detection applying the earth mover's distance (EMD) in scalp EEG. Firstly, the wavelet decomposition is executed to the original EEGs with five scales, the scale 3, 4 and 5 are selected and transformed into histograms and afterwards the distances between histograms in pairs are computed applying the earth mover's distance as effective features. Read More

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http://dx.doi.org/10.1007/s13534-018-0082-3DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6209084PMC
November 2018

Simultaneous monitoring of motion ECG of two subjects using Bluetooth Piconet and baseline drift.

Biomed Eng Lett 2018 Nov 31;8(4):365-371. Epub 2018 Jul 31.

Instrumentation and Control Engineering Department, Sarvajanik College of Engineering & Technology, Gujarat Technological University (GTU), Chandkheda, Surat-01, Gujarat India.

Uninterrupted monitoring of multiple subjects is required for mass causality events, in hospital environment or for sports by medical technicians or physicians. Movement of subjects under monitoring requires such system to be wireless, sometimes demands multiple transmitters and a receiver as a base station and monitored parameter must not be corrupted by any noise before further diagnosis. A Bluetooth Piconet network is visualized, where each subject carries a Bluetooth transmitter module that acquires vital sign continuously and relays to Bluetooth enabled device where, further signal processing is done. Read More

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http://dx.doi.org/10.1007/s13534-018-0081-4DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6209088PMC
November 2018

Side lobe free medical ultrasonic imaging with application to assessing side lobe suppression filter.

Biomed Eng Lett 2018 Nov 7;8(4):355-364. Epub 2018 Jul 7.

2Division of Human IT Convergence Engineering, Daejin University, Pocheon, Gyeonggi 11159 Republic of Korea.

When focusing using an ultrasonic transducer array, a main lobe is formed in the focal region of an ultrasound field, but side lobes also arise around the focal region due to the leakage. Since the side lobes cannot be completely eliminated in the focusing process, they are responsible for subsequent ultrasound image quality degradation. To improve ultrasound image quality, a signal processing strategy to reduce side lobes is definitely in demand. Read More

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http://dx.doi.org/10.1007/s13534-018-0079-yDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6209083PMC
November 2018

Electromyography-signal-based muscle fatigue assessment for knee rehabilitation monitoring systems.

Biomed Eng Lett 2018 Nov 9;8(4):345-353. Epub 2018 Jul 9.

3Department of Mechanical and Control Engineering, Handong Global University, 558 Handong-ro Buk-gu, Pohang, Gyeongbuk 37554 Republic of Korea.

This study suggested a new EMG-signal-based evaluation method for knee rehabilitation that provides not only fragmentary information like muscle power but also in-depth information like muscle fatigue in the field of rehabilitation which it has not been applied to. In our experiment, nine healthy subjects performed straight leg raise exercises which are widely performed for knee rehabilitation. During the exercises, we recorded the joint angle of the leg and EMG signals from four prime movers of the leg: rectus femoris (RFM), vastus lateralis, vastus medialis, and biceps femoris (BFLH). Read More

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http://dx.doi.org/10.1007/s13534-018-0078-zDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6209086PMC
November 2018

Design and 3D-printing of titanium bone implants: brief review of approach and clinical cases.

Biomed Eng Lett 2018 Nov 12;8(4):337-344. Epub 2018 Jul 12.

1Israel Institute of Metals, Technion R&D Foundation, 3200003 Technion City, Haifa, Israel.

Additive manufacturing (AM) is an alternative metal fabrication technology. The outstanding advantage of AM (3D-printing, direct manufacturing), is the ability to form shapes that cannot be formed with any other traditional technology. 3D-printing began as a new method of prototyping in plastics. Read More

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http://dx.doi.org/10.1007/s13534-018-0080-5DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6209081PMC
November 2018

The effect of mechanical or electrical stimulation on apnea length in mice.

Biomed Eng Lett 2018 Aug 30;8(3):329-335. Epub 2018 Jun 30.

1Department of Biomedical Engineering, Boston University, Boston, MA USA.

Premature birth is a leading cause of infant mortality which is often attributed to irregular breathing and apnea of prematurity. A common treatment for apnea is caffeine to stimulate the brain's respiratory center. However, caffeine's long term effect on infant development is not fully comprehended. Read More

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http://dx.doi.org/10.1007/s13534-018-0076-1DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6208540PMC

Automatic disease stage classification of glioblastoma multiforme histopathological images using deep convolutional neural network.

Biomed Eng Lett 2018 Aug 25;8(3):321-327. Epub 2018 Jun 25.

1Graduate School of Engineering, Mie University, 1577 Kurima-machiya, Tsu, Mie 514-8507 Japan.

In the field of computational histopathology, computer-assisted diagnosis systems are important in obtaining patient-specific diagnosis for various diseases and help precision medicine. Therefore, many studies on automatic analysis methods for digital pathology images have been reported. In this work, we discuss an automatic feature extraction and disease stage classification method for glioblastoma multiforme (GBM) histopathological images. Read More

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http://dx.doi.org/10.1007/s13534-018-0077-0DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6208537PMC

Characteristics of the pulsating jet flow through a dynamic glottal model with a lens-like constriction.

Biomed Eng Lett 2018 Aug 8;8(3):309-320. Epub 2018 Jun 8.

2Department of Mechanical Engineering and Aeronautics, City University London, Northampton Square, London, UK.

A computational study of the pulsating jet in a squared channel with a dynamic glottal-shaped constriction is presented. It follows the model experiments of Triep and Brücker (J Acoust Soc Am 127(2):1537-1547, 2010) with the cam-driven model that replicates the dynamic glottal motion in the process of human phonation. The boundary conditions are mapped from the model experiment onto the computational model and the three dimensional time resolved velocity and pressure fields are numerically calculated. Read More

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http://dx.doi.org/10.1007/s13534-018-0075-2DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6208545PMC

A novel hinged ankle foot orthosis for gait performance in chronic hemiplegic stroke survivors: a feasibility study.

Biomed Eng Lett 2018 Aug 29;8(3):301-308. Epub 2018 May 29.

4Department of Physical Therapy, Kyungnam University, 7 Kyungnamdaehak-ro, Masanhappo-gu, Changwon, Gyeongsangnam-do 51767 Republic of Korea.

Stroke survivors with gait disturbances may use ankle foot orthoses (AFOs). However, most AFOs come in one-piece styles, which make it difficult for spasticity-affected stroke survivors to don. AFOs are also limited since they do not properly prevent ankle joint for foot drop by itself. Read More

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http://dx.doi.org/10.1007/s13534-018-0074-3DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6208543PMC
August 2018
2 Reads

Monitoring osseointegrated prosthesis loosening and fracture using electrical capacitance tomography.

Biomed Eng Lett 2018 Aug 26;8(3):291-300. Epub 2018 May 26.

Department of Structural Engineering, University of California-San Diego, La Jolla, CA 92093-0085 USA.

A noncontact, noninvasive, electrical permittivity imaging technique is proposed for monitoring loosening of osseointegrated prostheses and bone fracture. The proposed method utilizes electrical capacitance tomography (ECT), which employs a set of noncontact electrodes, arranged in a circular fashion around the imaging area, for electrical excitations and measurements. An inverse reconstruction algorithm was developed and implemented to reconstruct the electrical permittivity distribution of the interrogated region from boundary capacitance measurements. Read More

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http://dx.doi.org/10.1007/s13534-018-0073-4DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6208536PMC

Validation of foot pitch angle estimation using inertial measurement unit against marker-based optical 3D motion capture system.

Biomed Eng Lett 2018 Aug 17;8(3):283-290. Epub 2018 May 17.

3St John of God Subiaco Hospital, Perth, Australia.

Gait analysis is relevant to a broad range of clinical applications in areas of orthopedics, neurosurgery, rehabilitation and the sports medicine. There are various methods available for capturing and analyzing the gait cycle. Most of gait analysis methods are computationally expensive and difficult to implement outside the laboratory environment. Read More

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http://dx.doi.org/10.1007/s13534-018-0072-5DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6208541PMC
August 2018
2 Reads

Electrodeless conductivity tensor imaging (CTI) using MRI: basic theory and animal experiments.

Biomed Eng Lett 2018 Aug 25;8(3):273-282. Epub 2018 Apr 25.

1Department of Biomedical Engineering, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447 Korea.

The electrical conductivity is a passive material property primarily determined by concentrations of charge carriers and their mobility. The macroscopic conductivity of a biological tissue at low frequency may exhibit anisotropy related with its structural directionality. When expressed as a tensor and properly quantified, the conductivity tensor can provide diagnostic information of numerous diseases. Read More

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http://dx.doi.org/10.1007/s13534-018-0066-3DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6208539PMC

Mechanical properties and cytotoxicity of PLA/PCL films.

Biomed Eng Lett 2018 Aug 4;8(3):267-272. Epub 2018 Apr 4.

3Department of Mechanical Engineering, University of Nevada, Las Vegas, NV 89154 USA.

Thermodynamically immiscible poly(lactic acid) (PLA) and poly(-caprolactone) (PCL) were blended and solution-cast by adding the 3% compatibilizer (tributyl citrate, TBC) of the PCL weight. In the PLA/PCL composition range of 99/1-95/5 wt%, mechanical properties of the PLA/PCL films with TBC were always superior to those of the films without TBC. The tensile strength of 42. Read More

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http://link.springer.com/10.1007/s13534-018-0065-4
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http://dx.doi.org/10.1007/s13534-018-0065-4DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6208544PMC
August 2018
10 Reads

The application of ECG cancellation in diaphragmatic electromyographic by using stationary wavelet transform.

Authors:
Guo Luo Zhi Yang

Biomed Eng Lett 2018 Aug 21;8(3):259-266. Epub 2018 Apr 21.

Nanfang College of Sun Yat-sen University, Guangzhou, China.

In this paper, we present and investigate a special kind of stationary wavelet algorithm using "inverse" hard threshold to eliminate the electrocardiogram (ECG) interference included in diaphragmatic electromyographic (EMGdi). Differing from traditional wavelet hard threshold, "inverse" hard threshold is used to shrink strong coefficients of ECG interference and reserve weak coefficients of EMGdi signal. Meanwhile, a novel QRS location algorithm is proposed for the position detection of R wave by using low frequency coefficients in this paper. Read More

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http://dx.doi.org/10.1007/s13534-018-0064-5DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6208538PMC

Surface morphology characterization of laser-induced titanium implants: lesson to enhance osseointegration process.

Biomed Eng Lett 2018 Aug 4;8(3):249-257. Epub 2018 Apr 4.

2Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON M5S 3G8 Canada.

The surface properties of implant are responsible to provide mechanical stability by creating an intimate bond between the bone and implant; hence, play a major role on osseointegration process. The current study was aimed to measure surface characteristics of titanium modified by a pulsed Nd:YAG laser. The results of this study revealed an optimum density of laser energy (140 Jcm), at which improvement of osteointegration process was seen. Read More

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http://dx.doi.org/10.1007/s13534-018-0063-6DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6208542PMC

Increasing the quality of reconstructed signal in compressive sensing utilizing Kronecker technique.

Biomed Eng Lett 2018 May 31;8(2):239-247. Epub 2018 Jan 31.

Iran ICT Research Centre (ITRC), Tehran, Iran.

Quality of reconstruction of signals sampled using compressive sensing (CS) algorithm depends on the compression factor and the length of the measurement. A simple method to pre-process data before reconstruction of compressively sampled signals using Kronecker technique that improves the quality of recovery is proposed. This technique reduces the mutual coherence between the projection matrix and the sparsifying basis, leading to improved reconstruction of the compressed signal. Read More

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http://dx.doi.org/10.1007/s13534-018-0057-4DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6208527PMC

Adaptive filtering method for EMG signal using bounded range artificial bee colony algorithm.

Biomed Eng Lett 2018 May 28;8(2):231-238. Epub 2017 Dec 28.

Govind Ballabh Pant Engineering College, Pauri, Uttarakhand 246194 India.

In this paper, an adaptive artefact canceller is designed using the bounded range artificial bee colony (BR-ABC) optimization technique. The results of proposed method are compared with recursive least square and other evolutionary algorithms. The performance of these algorithms is evaluated in terms of signal-to-noise ratio (SNR), mean square error (MSE), maximum error (ME) mean, standard deviation (SD) and correlation factor (r). Read More

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http://dx.doi.org/10.1007/s13534-017-0056-xDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6208526PMC

Review: optically-triggered phase-transition droplets for photoacoustic imaging.

Biomed Eng Lett 2018 May 12;8(2):223-229. Epub 2018 May 12.

1Department of Medicine and Heart and Vascular Institute, Center for Ultrasound Molecular Imaging and Therapeutics, University of Pittsburgh School of Medicine and University of Pittsburgh Medical Center (UPMC), Pittsburgh, PA 15261 USA.

Optically-triggered phase-transition droplets have been introduced as a promising contrast agent for photoacoustic and ultrasound imaging that not only provide significantly enhanced contrast but also have potential as photoacoustic theranostic molecular probes incorporated with targeting molecules and therapeutics. For further understanding the dynamics of optical droplet vaporization process, an innovative, methodical analysis by concurrent acoustical and ultrafast optical recordings, comparing with a theoretical model has been employed. In addition, the repeatability of the droplet vaporization-recondensation process, which enables continuous photoacoustic imaging has been studied through the same approach. Read More

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http://link.springer.com/10.1007/s13534-018-0069-0
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http://dx.doi.org/10.1007/s13534-018-0069-0DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6208524PMC
May 2018
1 Read

Naphthalocyanines as contrast agents for photoacoustic and multimodal imaging.

Biomed Eng Lett 2018 May 7;8(2):215-221. Epub 2018 Mar 7.

Department of Biomedical Engineering, University at Buffalo, State University of New York, Buffalo, NY 14260 USA.

Naphthalocyanines (Ncs) are a family of aromatic small molecule with large near infrared extinction coefficients, making them appealing contrast agent candidates for photoacoustic imaging (PAI). Depending on the substitutions on the Nc periphery or metal center, different spectrally-resolved absorption peak wavelengths are possible, which can enable photoacoustic contrast multiplexing. Owing to their generally poor aqueous solubility, approaches have been developed to modify Ncs or formulate them as biocompatible contrast agents for PAI. Read More

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http://dx.doi.org/10.1007/s13534-018-0059-2DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6208521PMC

Photoacoustic microscopy: principles and biomedical applications.

Authors:
Wei Liu Junjie Yao

Biomed Eng Lett 2018 May 25;8(2):203-213. Epub 2018 Apr 25.

Department of Biomedical Engineering, Duke University, 100 Science Drive, Durham, NC 27708 USA.

Photoacoustic microscopy (PAM) has become an increasingly popular technology for biomedical applications, providing anatomical, functional, and molecular information. In this concise review, we first introduce the basic principles and typical system designs of PAM, including optical-resolution PAM and acoustic-resolution PAM. The major imaging characteristics of PAM, i. Read More

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http://dx.doi.org/10.1007/s13534-018-0067-2DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6208522PMC

Multimodal photoacoustic imaging as a tool for sentinel lymph node identification and biopsy guidance.

Biomed Eng Lett 2018 May 21;8(2):183-191. Epub 2018 Apr 21.

1Department of Biomedical Engineering, Sogang University, 35 Baekbeom-ro, Mapo-gu, Seoul, 04107 South Korea.

As a minimally invasive method, sentinel lymph node biopsy (SLNB) in conjunction with guidance methods is the standard method to determine cancer metastasis in breast. The desired guidance methods for SLNB should be capable of precise SLN localization for accurate diagnosis of micro-metastases at an early stage of cancer progression and thus facilitate reducing the number of SLN biopsies for minimal surgical complications. For this, high sensitivity to the administered dyes, high spatial and contrast resolutions, deep imaging depth, and real-time imaging capability are pivotal requirements. Read More

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http://dx.doi.org/10.1007/s13534-018-0068-1DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6208518PMC

Fast photoacoustic imaging systems using pulsed laser diodes: a review.

Biomed Eng Lett 2018 May 6;8(2):167-181. Epub 2018 Mar 6.

School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459 Singapore.

Photoacoustic imaging (PAI) is a newly emerging imaging modality for preclinical and clinical applications. The conventional PAI systems use Q-switched Nd:YAG/OPO (Optical Parametric Oscillator) nanosecond lasers as excitation sources. Such lasers are expensive, bulky, and imaging speed is limited because of low pulse repetition rate. Read More

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http://dx.doi.org/10.1007/s13534-018-0060-9DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6208528PMC

Development and clinical translation of photoacoustic mammography.

Biomed Eng Lett 2018 May 7;8(2):157-165. Epub 2018 May 7.

3Japan Science and Technology Agency, ImPACT Program, Cabinet Office, K's Gobancho, 7, Gobancho, Chiyoda-ku, Tokyo, 102-0076 Japan.

To practically apply photoacoustic (PA) imaging technology in medicine, we have developed prototypes of a photoacoustic mammography (PAM) device to acquire images for diagnosing breast cancer in the Kyoto University/Canon joint research project (CK project supported by MEXT, Japan). First, the basic ability of the PAM system to visualize the network of blood vessels and the Hb saturation index was evaluated using a prototype of PAM that has a flat scanning detector and is capable of simultaneously acquiring photoacoustic (PA) and ultrasound images. Next, another prototype of a PAM device with hemispherical sensors was developed to improve the visibility of the 3D structure of vessels by reducing the limited view effect. Read More

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http://dx.doi.org/10.1007/s13534-018-0070-7DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6208520PMC

Clinical photoacoustic imaging platforms.

Biomed Eng Lett 2018 May 4;8(2):139-155. Epub 2018 Apr 4.

1Department of Electrical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, Gyeongbuk Republic of Korea.

Photoacoustic imaging (PAI) is a new promising medical imaging technology available for diagnosing and assessing various pathologies. PAI complements existing imaging modalities by providing information not currently available for diagnosing, e.g. Read More

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http://dx.doi.org/10.1007/s13534-018-0062-7DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6208525PMC

Multimodal photoacoustic imaging: systems, applications, and agents.

Biomed Eng Lett 2018 May 10;8(2):137-138. Epub 2018 May 10.

3Department of Biomedical Engineering, The Henry Samueli School of Engineering, University of California, Irvine, Irvine, CA 92697 USA.

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http://dx.doi.org/10.1007/s13534-018-0071-6DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6208519PMC

Obstructive sleep apnoea detection using convolutional neural network based deep learning framework.

Biomed Eng Lett 2018 Feb 14;8(1):95-100. Epub 2017 Dec 14.

Jadavpur University, Kolkata, West Bengal India.

This letter presents an automated obstructive sleep apnoea (OSA) detection method with high accuracy, based on a deep learning framework employing convolutional neural network. The proposed work develops a system that takes single lead electrocardiography signals from patients for analysis and detects the OSA condition of the patient. The results show that the proposed method has some advantages in solving such problems and it outperforms the existing methods significantly. Read More

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http://dx.doi.org/10.1007/s13534-017-0055-yDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6208553PMC
February 2018
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Machine learning in biomedical engineering.

Biomed Eng Lett 2018 Feb 6;8(1):1-3. Epub 2018 Feb 6.

3School of Biomedical Engineering, Korea University, 145, Anam-ro, Anam-dong 5-ga, Seongbuk-gu, Seoul, 02841 Korea.

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http://dx.doi.org/10.1007/s13534-018-0058-3DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6208556PMC
February 2018

Multimodal Intravascular Photoacoustic and Ultrasound Imaging.

Biomed Eng Lett 2018 May 26;8(2):193-201. Epub 2018 Mar 26.

Beckman Laser Institute, University of California, Irvine, 1002 Health Sciences Road, Irvine, CA 92617 USA.

The rupture of atherosclerotic plaques is the leading cause of death in developed countries. Early identification of vulnerable plaque is the essential step in preventing acute coronary events. Intravascular photoacoustic (IVPA) technology is able to visualize chemical composition of atherosclerotic plaque with high specificity and sensitivity. Read More

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http://dx.doi.org/10.1007/s13534-018-0061-8DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6208523PMC

First demonstration of velocity selective recording from the pig vagus using a nerve cuff shows respiration afferents.

Biomed Eng Lett 2018 Feb 22;8(1):127-136. Epub 2017 Nov 22.

1Department of Electronic and Electrical Engineering, University of Bath, Bath, England, UK.

Neural interfaces have great potential to treat disease and disability by modulating the electrical signals within the nervous system. However, whilst neural stimulation is a well-established technique, current neural interfaces are limited by poor recording ability. Low signal amplitudes necessitate the use of highly invasive techniques that divide or penetrate the nerve, and as such are unsuitable for chronic implantation. Read More

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http://dx.doi.org/10.1007/s13534-017-0054-zDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6208561PMC
February 2018
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A computational model of ureteral peristalsis and an investigation into ureteral reflux.

Biomed Eng Lett 2018 Feb 18;8(1):117-125. Epub 2017 Nov 18.

Whipps Cross Hospital, London, E11 1NR UK.

The aim of this study is to create a computational model of the human ureteral system that accurately replicates the peristaltic movement of the ureter for a variety of physiological and pathological functions. The objectives of this research are met using our in-house fluid-structural dynamics code (CgLes-Y code). A realistic peristaltic motion of the ureter is modelled using a novel piecewise linear force model. Read More

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http://dx.doi.org/10.1007/s13534-017-0053-0DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6208564PMC
February 2018

Elastography for portable ultrasound.

Biomed Eng Lett 2018 Feb 27;8(1):101-116. Epub 2017 Oct 27.

1Department of Mechanical and Mechatronics Engineering, University of Waterloo, 200 University Ave. W, Waterloo, ON N2L 3G1 Canada.

Portable wireless ultrasound has been emerging as a new ultrasound device due to its unique advantages including small size, lightweight, wireless connectivity and affordability. Modern portable ultrasound devices can offer high quality sonogram images and even multiple ultrasound modes such as color Doppler, echocardiography, and endovaginal examination. However, none of them can provide elastography function yet due to the limitations in computational performance and data transfer speed of wireless communication. Read More

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http://dx.doi.org/10.1007/s13534-017-0052-1DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6208563PMC
February 2018

Performance of machine learning methods in diagnosing Parkinson's disease based on dysphonia measures.

Biomed Eng Lett 2018 Feb 12;8(1):29-39. Epub 2017 Oct 12.

1Montreal Neurological Institute, McGill University, Montreal, QC Canada.

Parkinson's disease (PD) is a widespread degenerative syndrome that affects the nervous system. Its early appearing symptoms include tremor, rigidity, and vocal impairment (dysphonia). Consequently, speech indicators are important in the identification of PD based on dysphonic signs. Read More

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http://dx.doi.org/10.1007/s13534-017-0051-2DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6208554PMC
February 2018

Computer-assisted brain tumor type discrimination using magnetic resonance imaging features.

Biomed Eng Lett 2018 Feb 4;8(1):5-28. Epub 2017 Oct 4.

3College of Computer and Information Systems, Al-Yamamah University, Riyadh, 11512 Saudi Arabia.

Medical imaging plays an integral role in the identification, segmentation, and classification of brain tumors. The invention of MRI has opened new horizons for brain-related research. Recently, researchers have shifted their focus towards applying digital image processing techniques to extract, analyze and categorize brain tumors from MRI. Read More

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http://dx.doi.org/10.1007/s13534-017-0050-3DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6208555PMC
February 2018

PID controller design to generate pulsatile flow rate for in vitro experimental studies of physiological flows.

Biomed Eng Lett 2017 Nov 30;7(4):339-344. Epub 2017 Sep 30.

2Department of Mechanical and Aerospace Engineering, The George Washington University, 800 22nd St. NW, Washington, DC 20052 USA.

Producing accurate pulsatile flow rates is essential for many in vitro experimental studies in biofluid dynamics research. A controller system was developed to control a flow loop to produce easily adjustable pulsatile flow rates with sufficient accuracy. An Arduino board is used as a micro-controller to control a pump to produce various pulsatile flow rates, and an open-source proportional-integral-derivative (PID) control algorithm is developed for this purpose. Read More

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http://dx.doi.org/10.1007/s13534-017-0049-9DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6208515PMC
November 2017