Publications
232 results found
Fakhry M, Gallagher B, Bello F, et al., 2009, Visual exposure using single-handed magnet-driven intra-abdominal wireless camera in minimal access surgery, SURGICAL ENDOSCOPY AND OTHER INTERVENTIONAL TECHNIQUES, Vol: 23, Pages: 539-543, ISSN: 0930-2794
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- Citations: 14
Lee ACH, Elson DS, Neil MA, et al., 2009, Solid-state semiconductors are better alternatives to arc-lamps for efficient and uniform illumination in minimal access surgery., Surg Endosc, Vol: 23, Pages: 518-526
INTRODUCTION: Current arc-lamp illumination systems have a number of technical and ergonomic limitations. White light-emitting diodes (LEDs) are energy-efficient solid-state lighting devices which are small, durable and inexpensive. Their use as an alternative to arc-lamp light sources in minimal access surgery has not been explored. This study aims to develop an LED-based endo-illuminator and to determine its lighting characteristics for use in minimal access surgery. METHODS: We developed an LED endo-illuminator using a white LED mounted at the tip of a steel rod. Offline image analysis was carried out to compare the illuminated field using the LED endo-illuminator or an arc-lamp based endoscope in terms of uniformity, shadow sharpness and overall image intensity. Direct radiometric power measurements in light intensity and stability were obtained. Visual perception of fine details at the peripheral endoscopic field was assessed by 13 subjects using the different illumination systems. RESULTS: Illumination from the LED endo-illuminator was more uniform compared to illumination from an arc-lamp source, especially at the closer distance of 4 cm (0.0006 versus 0.0028 arbitrary units--lower value indicates more uniform illumination). The shadows were also sharper (edge widths of 16 versus 44 pixels for the first edge and 15 versus 61 pixels for the second edge). The overall mean image intensity was higher (127 versus 100 arbitrary units) when using the autoshutter mode despite the lower direct radiometric power, about one tenth of the arc-lamp endoscopic system. The illumination was also more stable with less flickering (0.02% versus 5% of total power in non-DC components). Higher median scores on visual perception was also obtained (237 versus 157, p < 0.001). CONCLUSION: The LED endo-illuminator provides more uniform illumination with sharper shadows, less flickering and better illumination for visual perception than the arc-lamp-based system currently used.
Vidal FP, Villard P-F, Holbrey R, et al., 2009, Developing An Immersive Ultrasound Guided Needle Puncture Simulator, 17th Conference on Medicine Meets Virtual Reality, Publisher: IOS PRESS, Pages: 398-+, ISSN: 0926-9630
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- Citations: 9
Villard P-F, Bourne W, Bello F, 2009, Interactive Simulation of Diaphragm Motion Through Muscle and Rib Kinematics, Workshop on 3D Physiological Human, Publisher: SPRINGER-VERLAG LONDON LTD, Pages: 91-103
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- Citations: 3
Hu M, Penney GP, Rueckert D, et al., 2009, Non-rigid Reconstruction of the Beating Heart Surface for Minimally Invasive Cardiac Surgery, 12th International Conference on Medical Image Computing and Computer-Assisted Intervention (MICCAI2009), Publisher: SPRINGER-VERLAG BERLIN, Pages: 34-+, ISSN: 0302-9743
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- Citations: 18
Villard P-F, Jacob M, Gould D, et al., 2009, Haptic Simulation of the Liver with Respiratory Motion, 17th Conference on Medicine Meets Virtual Reality, Publisher: IOS PRESS, Pages: 401-+, ISSN: 0926-9630
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- Citations: 5
Kneebone R, Bello F, 2008, Surgical Simulation, Manual of simulation in healthcare, Editors: Riley, Oxford, UK, Publisher: Oxford University Press, Pages: 1-352, ISBN: 978-0-19-920585-1
Bello F, Edwards PJE, 2008, Biomedical Simulation - 4th International Symposium, ISBMS 2008, London, UK, July 7-8, 2008 Proceedings: Preface, ISSN: 0302-9743
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- Citations: 1
Nestel D, Bello F, Kneebone R, et al., 2008, Remote assessment and learner-centred feedback on procedural skills, Clinical Teacher, Vol: 5, Pages: 88-92, ISSN: 1743-4971
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- Citations: 6
Fakhry M, Gallagher B, Bello F, et al., 2008, Visual exposure using magnet driven, intra-abdominal wireless camera in minimal access surgery, Surgical Endoscopy, ISSN: 0930-2794
Pratt P, Bello F, Edwards E, et al., 2008, Interactive finite element simulation of the beating heart for image-guided robotic cardiac surgery, 16th Conference on Medicine Meets Virtual Reality, Publisher: I O S PRESS, Pages: 378-383, ISSN: 0926-9630
Kneebone R, Nestel D, Bello F, et al., 2008, An integrated procedural performance instrument (IPPI) for learning and assessing procedural skills, Clinical Teacher, Vol: 5, Pages: 45-48, ISSN: 1743-4971
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- Citations: 14
Pratt P, Bello F, Edwards E, et al., 2008, Interactive finite element simulation of the beating heart for image-guided robotic cardiac surgery., Pages: 378-383
An interactive finite element simulation of the beating heart is described in which the intrinsic motion is implied from preoperative 4D tomographic scan data. The equations of motion are reversed such that, given changes in node displacements over time, the node forces that produce those changes are recovered. Subsequently, these forces are resolved from the global coordinate system into systems local to each mesh element such that, at each simulation time step, the collection of node forces can be expressed as simple weighted sums of current node positions. This facilitates the combination of extrinsic forces like those due to tool-tissue interactions, gravity, insufflation of the thoracic cavity and left lung deflation. The method has been applied initially to volumetric images of a pneumatically-operated beating heart phantom.
Figl M, Rueckert D, Hawkes D, et al., 2008, Augmented reality image guidance for minimally invasive coronary artery bypass, Medical Imaging 2008 Conference, Publisher: SPIE-INT SOC OPTICAL ENGINEERING, ISSN: 0277-786X
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- Citations: 4
Villard P-F, Bourne W, Bello F, 2008, Modelling organ deformation using mass-springs and tensional integrity, 4th International Symposium on Biomedical Simulation, Publisher: SPRINGER-VERLAG BERLIN, Pages: 221-226, ISSN: 0302-9743
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- Citations: 6
Kneebone R, Bello F, Nestel D, et al., 2008, Learner-centred feedback using remote assessment of clinical procedures, MEDICAL TEACHER, Vol: 30, Pages: 795-801, ISSN: 0142-159X
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- Citations: 19
Figl M, Rueckert D, Hawkes D, et al., 2008, Coronary motion modelling for augmented reality guidance of endoscopic coronary artery bypass, 4th International Symposium on Biomedical Simulation, Publisher: SPRINGER-VERLAG BERLIN, Pages: 197-+, ISSN: 0302-9743
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- Citations: 1
Chhikara A, Rice AC, McGregor AH, et al., 2008, In-House Monitoring of low back pain related disability (IMPAIRED)., Annu Int Conf IEEE Eng Med Biol Soc, Vol: 2008, Pages: 4507-4510, ISSN: 2375-7477
Preventive care, healthcare management and a working population are areas of growing emphasis in industrialized countries. Recent exponential growth in technological developments has made developing wearable monitoring systems feasible. Chronic Low Back Pain (CLBP) is a leading cause of disability with staggering economic costs and severe psychological and social consequences. A principal issue is the assessment of LBP severity at a single point of time during clinic visits rather than through continuous monitoring. This paper presents the project In-House Monitoring of Low-Back-Pain Related Disability (IMPAIRED) which aims to design and develop a multi-sensor wearable prototype to monitor movement of the lumbar spine and pelvis, sleep disturbance (circadian rhythm), as well as muscle fatigue and activity pattern. We have identified relevant movements correlating to disability associated with LBP, evaluated the suitability of inertial sensors to monitor the expected range of movement and proposed a sensor placement map.
Chhikara A, Rice ASC, McGregor AH, et al., 2008, In-House Monitoring of Low Back Pain related Disability (IMPAIRED), 30th Annual International Conference of the IEEE-Engineering-in-Medicine-and-Biology-Society, Publisher: IEEE, Pages: 4507-+, ISSN: 1557-170X
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- Citations: 6
Luboz V, Lai J, Blazewski R, et al., 2008, A virtual environment for core skills training in vascular Interventional Radiology, 4th International Symposium on Biomedical Simulation, Publisher: SPRINGER-VERLAG BERLIN, Pages: 215-220, ISSN: 0302-9743
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- Citations: 6
John NW, Luboz V, Bello F, et al., 2008, Physics-based virtual environment for training core skills in vascular interventional radiological procedures, 16th Conference on Medicine Meets Virtual Reality, Publisher: IOS PRESS, Pages: 195-197, ISSN: 0926-9630
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- Citations: 2
Figl M, Rueckert D, Hawkes D, et al., 2008, Image guidance for robotic minimally invasive coronary artery bypass, 4th International Workshop on Medical Imaging and Augmented Reality, Publisher: SPRINGER-VERLAG BERLIN, Pages: 202-+, ISSN: 0302-9743
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- Citations: 4
Fakhry M, Bello F, Hanna GB, 2007, Employing Bending Beam Transducer Design and Statistical Algorithms to Develop a Clinical Real Time Tissue Compliance Mapping System, 29th Annual International Conference of the IEEE Engineering in Medicine and Biology Society
Fakhry M, Bello F, Hanna GB, 2007, Employing bending beam transducer design and statistical algorithms to develop a clinical real time tissue compliance mapping system, Pages: 3064-3068, ISSN: 0589-1019
In keyhole surgery, the use of long surgical instruments inserted through small ports in the body diminishes tactile feedback. Earlier methodologies to overcome this challenge never gained popularity in routine clinical practice due to either major modifications to the design of conventional surgical instruments, or relying on surgeons' subjective interpretation of compliance data that is often inaccurate with crossovers. In this paper we present a real time compliance mapping system which comprises of (i) bending beam transducer design to conventional surgical forceps, (ii) statistical analysis for real time objective interpretation of output signals, and (iii) novel human computer interaction techniques suitable for use in the operative theatre working environment. The system was calibrated and put into clinical practice in four routine human keyhole settings. In a research experiment involving 10 surgeons, the system's tissue discriminatory power was three times more sensitive, and 10% less specific than surgeon's hand. © 2007 IEEE.
Brenton H, Hernandez J, Bello F, et al., 2007, Using multimedia and Web3D to enhance anatomy teaching, International Workshop on Web3D Technologies for Learning, Education and Training, Publisher: PERGAMON-ELSEVIER SCIENCE LTD, Pages: 32-53, ISSN: 0360-1315
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- Citations: 115
Aggarwal R, Grantcharov T, Moorthy K, et al., 2007, An evaluation of the feasibility, validity, and reliability of laparoscopic skills assessment in the operating room, ANNALS OF SURGERY, Vol: 245, Pages: 992-999, ISSN: 0003-4932
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- Citations: 128
Aggarwal R, Dosis A, Bello F, et al., 2007, Motion tracking systems for assessment of surgical skill, SURGICAL ENDOSCOPY AND OTHER INTERVENTIONAL TECHNIQUES, Vol: 21, Pages: 339-339, ISSN: 0930-2794
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- Citations: 17
Theodoropoulos A, Kneebone R, Dornan B, et al., 2007, Development and evaluation of a virtual intensive therapy unit - VITU., Stud Health Technol Inform, Vol: 125, Pages: 467-469, ISSN: 0926-9630
Complex and safety critical healthcare environments like the Intensive Therapy Unit demand highly skilled professionals efficiently interacting with their technologically advanced surroundings and with each other. The ITU environment is daunting to newcomers and contains considerable potential for harm by inexpert treatment. In spite of this, current training is largely workplace based and depends upon observation and supervised practice with real patients. We propose the development of a distributed collaborative environment that recreates key elements of critical care. Centred on a 'virtual bedspace', team members will care for the patient in a way that accurately reflects actual practice and therefore minimises any learning gap. Graded exposure to increasing levels of complexity will ensure that collaborative learning takes place alongside each participant's clinical experience and complements it appropriately.
Kneebone R, Bello F, Nestel D, et al., 2007, Training and assessment of procedural skills in context using an Integrated Procedural Performance Instrument (IPPI)., Stud Health Technol Inform, Vol: 125, Pages: 229-231, ISSN: 0926-9630
The use of simulation in the training and assessment of procedural skills is widely acknowledged as a powerful and necessary alternative to the traditional apprenticeship model. However advanced, simulation on its own cannot provide the necessary conditions for holistic practice. The Integrated Procedural Performance Instrument presented in this paper combines simulated patients (SPs) with inanimate models, items of medical equipment or computer generated virtual models to recreate a panel of realistic scenarios, each addressing a combination of technical and non-technical clinical challenges. The result is a safe yet authentic clinical context which can be used for training and assessment. This novel use of simulation provides a patient-centred, learner-focused approach that builds up a composite picture of technical skills, communication skills and professional behaviours across a range of challenging clinical situations.
Kneebone R, Bello F, Nestel D, et al., 2007, Training and Assessment of Procedural Skills in Context using an Integrated Procedural Performance Instrument (IPPI), 15th Conference on Medicine Meets Virtual Reality, Publisher: IOS PRESS, Pages: 229-+, ISSN: 0926-9630
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- Citations: 17
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