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https://www.readbyqxmd.com/read/28227885/orthodontic-force-simulation-of-tooth-pdl-bone-complex-under-archwire-loading
#1
Xinwen Zhou, Zeyang Xia, Yangzhou Gan, Dongxia Zhang, Jing Xiong, Peng Fang, Guanglin Li, Qunfei Zhao, Xinwen Zhou, Zeyang Xia, Yangzhou Gan, Dongxia Zhang, Jing Xiong, Peng Fang, Guanglin Li, Qunfei Zhao, Zeyang Xia, Peng Fang, Xinwen Zhou, Dongxia Zhang, Yangzhou Gan, Guanglin Li, Jing Xiong, Qunfei Zhao
Orthodontic force simulation is very important for the guidance of clinical orthodontic treatment. Previous works were mainly conducted by directly loading the force on a single or a few teeth. However, in clinic, the orthodontic force is provided by loading orthodontic appliances, and there currently is no appropriate way to measure the force on the teeth provided by the loaded appliances. This study presents a method to simulate the orthodontic force of a whole Tooth-Periodontal Ligament-Bone Complex (TPBC) by directly loading the archwire to the dentition applying the finite element method...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227823/smartphone-based-swallowing-monitoring-and-feedback-device-for-mealtime-assistance-in-nursing-homes
#2
Naomi Kuramoto, Dushyantha Jayatilake, Kikue Hidaka, Kenji Suzuki, Naomi Kuramoto, Dushyantha Jayatilake, Kikue Hidaka, Kenji Suzuki, Kenji Suzuki, Kikue Hidaka, Dushyantha Jayatilake, Naomi Kuramoto
As many of the elderly are prone to dysphagia, preventing aspirations during mealtime assistance is a huge concern, especially for institutions operated with limited staff. Two of the main course of actions that are taken usually to prevent aspiration are the altering of bolus consistency and altering of the swallowing posture. To assist prevention of pneumonia, we have been developing a smartphone-based wearable technology that can evaluate swallowing ability in real-time. In this paper we will introduce modified version of Swallwoscope adding a posture detection system and a remote swallowing activity visualisation system to our previous work...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227797/human-robot-collaborated-path-planning-for-bevel-tip-needle-steering-in-simulated-human-environment
#3
Jing Xiong, Zeyang Xia, Yangzhou Gan, Jing Xiong, Zeyang Xia, Yangzhou Gan, Yangzhou Gan, Jing Xiong, Zeyang Xia
Clinical Application of linear percutaneous needle insertion is restricted due to issues such as limited path and deflection. Thus steering of flexible needle is critical demanded in the clinic. Previous studies tended to use autonomous methods to conduct path planning for needle steering. However, these methods had very limited adaptabilities, and they also decreased the human operator's domination of the operation, as clinically required. In this case, teleoperation has been an option, while in complicated environments sole teleoperation is not sufficient for a human operator to generate multi-curved insertion path...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227783/tooth-separation-from-dental-model-using-segmentation-field
#4
Hao Wang, Zhongyi Li, Hao Wang, Zhongyi Li, Zhongyi Li, Hao Wang
Tooth segmentation on dental model is an essential step of computer-aided-design systems for orthodontic virtual treatment planning. However, efficiently identifying cutting boundary to separate tooth from dental model still remains a challenge, due to various geometrical shapes of teeth, complex tooth arrangements and varying degrees of crowding problem. Most segmentation approaches presented before are not able to achieve a balance between fine segmentation results and simple operating procedure. In this article, we present a novel and efficient framework that achieves tooth segmentation based on the segmentation field...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227674/the-impact-of-different-leaf-limited-accelerations-on-leaf-positional-error-of-a-self-developed-mlc-prototype
#5
Xiang Zhang, Peiqing Ye, Hui Zhang, Xiang Zhang, Peiqing Ye, Hui Zhang, Peiqing Ye, Hui Zhang, Xiang Zhang
Multi-leaf collimator (MLC) provides an available approach to achieve sophisticated radiotherapy techniques and plays an important role in advanced high quality radiation therapy. Delivery accuracy of radiation therapy mainly depends on the leaf sequence generated by treatment plans and dynamic performance of MLCs. Previous studies have explored the influence of various leaf limited velocities and dose rates on the leaf-positional error. However, there is a lack of research on the influence of different leaf limited accelerations on the delivery accuracy or leaf-positional error...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227539/robot-assisted-assessment-of-wrist-proprioception-does-wrist-proprioceptive-acuity-follow-weber-s-law
#6
Sara Contu, Francesca Marini, Leonardo Cappello, Lorenzo Masia, Sara Contu, Francesca Marini, Leonardo Cappello, Lorenzo Masia, Lorenzo Masia, Sara Contu, Leonardo Cappello, Francesca Marini
Proprioception is essential for planning and controlling limb posture and movement. In our recent work, we introduced a standardized robot-aided method for measuring proprioceptive discrimination thresholds at the wrist to obtain reliable and accurate measures of proprioceptive acuity. Weber's law defines discrimination thresholds as a constant ratio between the just noticeable difference and the reference or standard stimulus. Reporting Weber's fractions thus provides the possibility of comparing results with the reports of others collected worldwide...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227514/preparation-of-a-neural-electrode-implantation-device-for-in-vivo-surgical-use
#7
Omar Tawakol, Samuel D Bredeson, Philip R Troyk, Omar Tawakol, Samuel D Bredeson, Philip R Troyk, Samuel D Bredeson, Omar Tawakol, Philip R Troyk
An instrument designed for the implantation of neural electrode array devices has been refined in preparation for use in cortical implantation procedures in non-human primates. This instrument has undergone extensive testing to ensure its successful first use in a live surgical setting. This work describes the modifications made to the instrument and the testing performed on it during that preparatory period as well as planned future modifications and augmentations.
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227485/augmented-reality-for-breast-tumors-visualization
#8
Mohammad Ali Ghaderi, Mehrdad Heydarzadeh, Mehrdad Nourani, Gopal Gupta, Lakshman Tamil, Mohammad Ali Ghaderi, Mehrdad Heydarzadeh, Mehrdad Nourani, Gopal Gupta, Lakshman Tamil, Gopal Gupta, Mehrdad Heydarzadeh, Lakshman Tamil, Mehrdad Nourani
3D visualization of breast tumors are shown to be effective by previous studies. In this paper, we introduce a new augmented reality application that can help doctors and surgeons to have a more accurate visualization of breast tumors; this system uses a marker-based image-processing technique to render a 3D model of the tumors on the body. The model can be created using a combination of breast 3D mammography by experts. We have tested the system using an Android smartphone and a head-mounted device. This proof of concept can be useful for oncologists to have a more effective screening, and surgeons to plan the surgery...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227427/inexact-coronary-tree-matching-algorithm-with-artificial-nodes
#9
Helene Feuillatre, Jean-Claude Nunes, Christine Toumoulin, Helene Feuillatre, Jean-Claude Nunes, Christine Toumoulin, Jean-Claude Nunes, Helene Feuillatre, Christine Toumoulin
Coronary tree matching is applied to plan percutaneous vascular procedures. This work, which allows following each segment of non-isomorphic coronary trees over time, precedes the determination of the best 2D angiography view from C-arm acquisition system for angioplasty procedure. To match two 3D coronary trees which represent two successive cardiac phases, we adapted a reference inexact tree matching algorithm based on association graph and maximum clique. To improve the pair-wise matching performance of our approach, artificial nodes are introduced to take into account the topology variation between 3D vascular trees...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227423/dynamic-mapping-of-ventricular-function-from-cardiovascular-magnetic-resonance-imaging
#10
Maria Panayiotou, Peter Mountney, Alexander Brost, Daniel Toth, Tom Jackson, Jonathan M Behar, Christopher A Rinaldi, R James Housden, Kawal S Rhode, Maria Panayiotou, Peter Mountney, Alexander Brost, Daniel Toth, Tom Jackson, Jonathan M Behar, Christopher A Rinaldi, R James Housden, Kawal S Rhode, Alexander Brost, Tom Jackson, Maria Panayiotou, Christopher A Rinaldi, Jonathan M Behar, R James Housden, Kawal S Rhode, Daniel Toth, Peter Mountney
Heart failure is associated with substantial mortality and morbidity and remains the most common diagnosis in older patients. Based on experimental electrophysiologic studies, cardiac resynchronization therapy (CRT) for heart failure results in a maximum resynchronization effect when applied to the most delayed left ventricular (LV) site. Current clinical practice is to identify the optimal site using separate visualisation of scar and activation information. These must be mentally mapped into 3D, which is challenging and time-consuming for the electrophysiologist...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227389/a-method-to-project-clinical-outcome-topographies-onto-preoperative-mri-to-guide-direct-dbs-targeting
#11
Mahesh B Shenai, Barton L Guthrie, Mahesh B Shenai, Barton L Guthrie, Barton L Guthrie, Mahesh B Shenai
The use of intraoperative MR and direct DBS targeting, relies on anatomical rather than functional data. Historical clinical outcome databases that have recorded stimulation location and magnitude of effect, can provide a useful adjunct in DBS targeting strategies. We present a method for generating clinical outcome topographies, and merging regions of effect onto a pre-operative MR, for surgical planning. The clinical outcome topographies are consistent with more intuitive strategies used by neurosurgeons...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227361/kinect2-respiratory-movement-detection-study
#12
Sandy Rihana, Elie Younes, Dimitris Visvikis, Hadi Fayad, Sandy Rihana, Elie Younes, Dimitris Visvikis, Hadi Fayad, Sandy Rihana, Elie Younes, Dimitris Visvikis, Hadi Fayad
Radiotherapy is one of the main cancer treatments. It consists in irradiating tumor cells to destroy them while sparing healthy tissue. The treatment is planned based on Computed Tomography (CT) and is delivered over fractions during several days. One of the main challenges is replacing patient in the same position every day to irradiate the tumor volume while sparing healthy tissues. Many patient positioning techniques are available. They are both invasive and not accurate performed using tattooed marker on the patient's skin aligned with a laser system calibrated in the treatment room or irradiating using X-ray...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227351/video-based-depression-detection-using-local-curvelet-binary-patterns-in-pairwise-orthogonal-planes
#13
Anastasia Pampouchidou, Kostas Marias, Manolis Tsiknakis, Panagiotis Simos, Fan Yang, Guillaume Lemaitre, Fabrice Meriaudeau, Anastasia Pampouchidou, Kostas Marias, Manolis Tsiknakis, Panagiotis Simos, Fan Yang, Guillaume Lemaitre, Fabrice Meriaudeau, Fabrice Meriaudeau, Guillaume Lemaitre, Manolis Tsiknakis, Kostas Marias, Anastasia Pampouchidou, Panagiotis Simos, Fan Yang
Depression is an increasingly prevalent mood disorder. This is the reason why the field of computer-based depression assessment has been gaining the attention of the research community during the past couple of years. The present work proposes two algorithms for depression detection, one Frame-based and the second Video-based, both employing Curvelet transform and Local Binary Patterns. The main advantage of these methods is that they have significantly lower computational requirements, as the extracted features are of very low dimensionality...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227158/interventional-placement-of-thin-coil-shaped-implants-powered-wirelessly-for-monitoring-vital-signals-and-controlling-abnormal-activities-by-electro-stimulation
#14
Hidetoshi Ohta, Masanobu Honda, Makoto Takamiya, Hidetoshi Ohta, Masanobu Honda, Makoto Takamiya, Masanobu Honda, Hidetoshi Ohta, Makoto Takamiya
Various types of implants are being commonly used for monitoring vital signals and controlling the critically ill patient's condition such as arrhythmia, sick sinus syndrome, etc. For implanting these medical devices under the skin, surgery is inevitable. These days many patients are more willing to accept interventional therapies that are less invasive, especially inserting a catheter into a blood vessel or endoscopy through a natural orifice. To be able to use interventional therapy for implanting medical devices, they will need to be small enough to fit them through a catheter or the forceps channel of an endoscope...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227119/clinical-viability-of-carotid-plaque-strain-estimation-using-b-mode-ultrasound-image-sequences
#15
Amir A Khan, Joseph C Hecker, Brajesh K Lal, Siddhartha Sikdar, Amir A Khan, Joseph C Hecker, Brajesh K Lal, Siddhartha Sikdar, Siddhartha Sikdar, Brajesh K Lal, Amir A Khan, Joseph C Hecker
It is estimated that approximately 30% of ischemic strokes are caused by rupture of plaque in the carotid artery. Development of techniques focusing on identifying plaques that are vulnerable to rupture is thus indispensable for stroke prevention. Recent studies have demonstrated that motion analysis of plaques from B-mode and RF ultrasound (US) image sequences can be used to estimate plaque strain. However, viability of these methods in a clinical setting, with variable acquisition protocols, has not been demonstrated yet...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227072/short-term-assessment-of-autonomic-nervous-system-as-a-potential-tool-to-quantify-pain-experience
#16
Arto J Hautala, Jaro Karppinen, Tapio Seppanen, Arto J Hautala, Jaro Karppinen, Tapio Seppanen, Jaro Karppinen, Arto J Hautala, Tapio Seppanen
Various pain conditions may result in altered autonomic nervous system regulation. We evaluated whether autonomic regulation, analyzed with short-term heart rate variability (HRV), differs between low back pain (LBP) patients and healthy controls. Additionally, we tested if short-term HRV recordings are feasible and informative in planning home monitoring of LBP patients. The study population consisted of 16 volunteers (8 LBP patients and 8 healthy subjects) (age 42±10 years, body mass index 26±4 kg/m(2), 7 men and 9 women)...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227057/mobile-interface-for-neuroprosthesis-control-aiming-tetraplegic-users
#17
Renato G Barelli, Plinio T Aquino, Maria Claudia Ferrari de Castro, Renato G Barelli, Plinio T Aquino Junior, Maria Claudia Ferrari de Castro, Plinio T Aquino, Maria Claudia Ferrari de Castro, Renato G Barelli
This article proposes the development of a mobile interface for controlling a Neuroprosthesis, designed to restore grasp patterns, aiming tetraplegics users at C5 and C6 levels. Human Computer Interface paradigms and usability concepts guide its planning and development to garantee the quality of user's interaction with the system and thus, the sucess and controlability of the neuroprostheses. The number of screens and menus were optimized, thus the user may feel the interface as more intuitive, leading to fast learning and increasing the trust on it...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227051/optimal-decision-support-rules-improve-personalize-warfarin-treatment-outcomes
#18
Chih-Lin Chi, Kourosh Ravvaz, John Weissert, Peter J Tonellato, Chih-Lin Chi, Kourosh Ravvaz, John Weissert, Peter J Tonellato, Chih-Lin Chi, Kourosh Ravvaz, John Weissert, Peter J Tonellato
We tested optimization-based approaches to generate decision support rules used to improve personalized warfarin treatment based on clinical and genetic characteristics. Our approach simulated warfarin treatment outcomes using five existing treatment plans for clinical avatars (virtual patients). We used individual clinical avatar Time-in-Therapeutic-Range to represent the two-sided adverse risk to bleeding (over dosed - above therapeutic range) and thrombosis (under dosed - below therapeutic range) and as the objective function in the optimization to minimize overall risk...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227047/a-stochastic-framework-for-spot-scanning-particle-therapy
#19
Marc Robini, Yuemin Zhu, Wanyu Liu, Isabelle Magnin, Marc Robini, Yuemin Zhu, Wanyu Liu, Isabelle Magnin, Wanyu Liu, Yuemin Zhu, Marc Robini, Isabelle Magnin
In spot-scanning particle therapy, inverse treatment planning is usually limited to finding the optimal beam fluences given the beam trajectories and energies. We address the much more challenging problem of jointly optimizing the beam fluences, trajectories and energies. For this purpose, we design a simulated annealing algorithm with an exploration mechanism that balances the conflicting demands of a small mixing time at high temperatures and a reasonable acceptance rate at low temperatures. Numerical experiments substantiate the relevance of our approach and open new horizons to spot-scanning particle therapy...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227032/a-statistical-model-for-stroke-outcome-prediction-and-treatment-planning
#20
Abhishek Sengupta, Vaibhav Rajan, Sakyajit Bhattacharya, G R K Sarma, Abhishek Sengupta, Vaibhav Rajan, Sakyajit Bhattacharya, G R K Sarma, Abhishek Sengupta, Grk Sarma, Vaibhav Rajan, Sakyajit Bhattacharya
Stroke is a major cause of mortality and long-term disability in the world. Predictive outcome models in stroke are valuable for personalized treatment, rehabilitation planning and in controlled clinical trials. We design a new multi-class classification model to predict outcome in the short-term, the putative therapeutic window for several treatments. Our model addresses the challenges of class imbalance, where the training data is dominated by samples of a single class, and highly correlated predictor and outcome variables, which makes learning the effects of treatments on the outcome difficult...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
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