Contractility patterns and gastrointestinal movements monitored by a combined magnetic tracking and motility testing unit

2021 ◽  
Author(s):  
Donghua Liao ◽  
Esben Bolvig Mark ◽  
Rasmus Bach Nedergaard ◽  
Anne‐Marie Wegeberg ◽  
Christina Brock ◽  
...  
Keyword(s):  
Magnetic Tracking ◽  
Testing Unit

scholarly journals Towards Tracking of Deep Brain Stimulation Electrodes Using an Integrated Magnetometer

Sensors ◽  
2021 ◽  
Vol 21 (8) ◽  
pp. 2670
Author(s):  
Thomas Quirin ◽  
Corentin Féry ◽  
Dorian Vogel ◽  
Céline Vergne ◽  
Mathieu Sarracanie ◽  
...  
Keyword(s):  
Deep Brain Stimulation ◽  
Brain Stimulation ◽  
Mean Absolute Error ◽  
Tracking System ◽  
Three Dimensional ◽  
Absolute Error ◽  
Magnetic Tracking ◽  
Magnetic Camera ◽  
Magnetic Resonance Imaging Mri ◽  
Deep Brain

This paper presents a tracking system using magnetometers, possibly integrable in a deep brain stimulation (DBS) electrode. DBS is a treatment for movement disorders where the position of the implant is of prime importance. Positioning challenges during the surgery could be addressed thanks to a magnetic tracking. The system proposed in this paper, complementary to existing procedures, has been designed to bridge preoperative clinical imaging with DBS surgery, allowing the surgeon to increase his/her control on the implantation trajectory. Here the magnetic source required for tracking consists of three coils, and is experimentally mapped. This mapping has been performed with an in-house three-dimensional magnetic camera. The system demonstrates how magnetometers integrated directly at the tip of a DBS electrode, might improve treatment by monitoring the position during and after the surgery. The three-dimensional operation without line of sight has been demonstrated using a reference obtained with magnetic resonance imaging (MRI) of a simplified brain model. We observed experimentally a mean absolute error of 1.35 mm and an Euclidean error of 3.07 mm. Several areas of improvement to target errors below 1 mm are also discussed.

scholarly journals Magnetic Tracking: A Facile Magnetic System for Tracking of Medical Devices (Adv. Mater. Technol. 6/2021)

2021 ◽  
Vol 6 (6) ◽  
pp. 2170033
Author(s):  
Liam Swanepoel ◽  
Nouf Alsharif ◽  
Alexander Przybysz ◽  
Pieter Fourie ◽  
Pierre Goussard ◽  
...  
Keyword(s):  
Medical Devices ◽  
Magnetic System ◽  
Magnetic Tracking

An Optically Aided Magnetic Tracking Approach for Magnetically Actuated Capsule Robot

2021 ◽  
Vol 70 ◽  
pp. 1-9
Author(s):  
Qinyuan Shi ◽  
Tangyou Liu ◽  
Shuang Song ◽  
Jiaole Wang ◽  
Max Q.-H. Meng
Keyword(s):  
Magnetic Tracking ◽  
Magnetically Actuated ◽  
Capsule Robot

Geomagnetic Compensation for the Rotating of Magnetometer Array During Magnetic Tracking

2019 ◽  
Vol 68 (9) ◽  
pp. 3379-3386 ◽  
Author(s):  
Houde Dai ◽  
Chao Hu ◽  
Shijian Su ◽  
Mingqiang Lin ◽  
Shuang Song
Keyword(s):  
Magnetic Tracking ◽  
Magnetometer Array

scholarly journals Magnetic Tracking: A Novel Method of Assessing Anterior Cruciate Ligament Deficiency

2006 ◽  
Vol 88 (1) ◽  
pp. 16-17 ◽  
Author(s):  
RK Kundra ◽  
JD Moorehead ◽  
N Barton-Hanson ◽  
SC Montgomery
Keyword(s):  
Anterior Cruciate Ligament ◽  
Tracking System ◽  
Cruciate Ligament ◽  
Magnetic Tracking ◽  
Lachman Test ◽  
Acl Deficiency ◽  
Anterior Tibial ◽  
Anterior Cruciate ◽  
Tracking Device ◽  
Acl Deficient

INTRODUCTION The Lachman test is commonly performed as part of the routine assessment of patients with suspected anterior cruciate ligament (ACL) deficiency. A major drawback is its reliance on the clinician's subjective judgement of movement. The aim of this study was to quantify Lachman movement using a magnetic tracking device thereby providing a more accurate objective measure of movement. PATIENTS AND METHODS Ten patients aged 21–51 years were assessed as having unilateral ACL deficiency with conventional clinical tests. These patients were then re-assessed using a Polhemus Fastrak™ magnetic tracking device. RESULTS The mean anterior tibial displacement was 5.6 mm (SD = 2.5) for the normal knees and 10.2 mm (SD = 4.2) for the ACL-deficient knees. This gave an 82% increase in anterior tibial displacement for the ACL deficient knees. This was shown to be highly significant with P = 0.005. CONCLUSIONS The magnetic tracking system offers an objective quantification of displacements during the Lachman test. It is convenient, non-invasive and comfortable for the patient and is, therefore, ideally suited for use as an investigative tool.

<i>Development of a field testing unit for vertical tillage (VT) and seeding</i>

2018 ◽  
Author(s):  
Sumanth Kuntavalli ◽  
Ying Chen ◽  
Qingjin Peng
Keyword(s):  
Field Testing ◽  
Testing Unit

Positioning Accuracy Improvement of Automated Guided Vehicles Based on a Novel Magnetic Tracking Approach

2020 ◽  
Vol 12 (4) ◽  
pp. 138-148 ◽  
Author(s):  
Shijian Su ◽  
Xianping Zeng ◽  
Shuang Song ◽  
Mingqiang Lin ◽  
Houde Dai ◽  
...  
Keyword(s):  
Automated Guided Vehicles ◽  
Accuracy Improvement ◽  
Positioning Accuracy ◽  
Magnetic Tracking

scholarly journals SPICE Model of a Logarithmic Converter for Magnetic Tracking Systems

2020 ◽  
Vol 42 (2) ◽  
pp. 69-90
Author(s):  
T.A. Marusenkova ◽  
Keyword(s):  
Tracking Systems ◽  
Magnetic Tracking ◽  
Spice Model ◽  
Logarithmic Converter

Full-Volume Assessment of Abdominal Aortic Aneurysms by 3-D Ultrasound and Magnetic Tracking

2020 ◽  
Vol 46 (12) ◽  
pp. 3440-3447
Author(s):  
Alexander H. Zielinski ◽  
Kim Kargaard Bredahl ◽  
Qasam Ghulam ◽  
Laurence Rouet ◽  
Cecile Dufour ◽  
...  
Keyword(s):  
Abdominal Aortic Aneurysms ◽  
Aortic Aneurysms ◽  
Magnetic Tracking ◽  
Abdominal Aortic ◽  
Volume Assessment ◽  
Full Volume
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