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

Liam Swanepoel; Nouf Alsharif; Alexander Przybysz; Pieter Fourie; Pierre Goussard; Mohammad Asadullah Khan; Abdullah Almansouri; Jurgen Kosel

doi:10.1002/admt.202170033

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

Advanced Materials Technologies ◽

10.1002/admt.202170033 ◽

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

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Comparison of Magnetic Tracking and Optical Tracking by Simultaneous Use of Two Independent Frameless Stereotactic Systems

Operative Neurosurgery ◽

10.1227/01.neu.0000176411.55324.1e ◽

2005 ◽

Vol 57 (suppl_4) ◽

pp. ONS-295-ONS-301 ◽

Cited By ~ 22

Author(s):

Christopher R. Mascott

Keyword(s):

Magnetic Field ◽

Root Mean Square ◽

Magnetic System ◽

Tracking System ◽

Optical Tracking ◽

Preoperative Imaging ◽

Mean Square ◽

Anatomic Landmarks ◽

Optical Tracking System ◽

Magnetic Tracking

Abstract OBJECTIVE: The goal of this study was to compare the calculated accuracy and the true surgical accuracy of a magnetic and an optical tracking system at surgical registration and during surgery. METHODS: Two Food and Drug Administration-approved, commercially available frameless stereotactic systems were used simultaneously in 70 surgical cases. The Compass Cygnus-PFS system (Compass International, Rochester MN) uses magnetic field referencing and tracking. The StealthStation (Medtronic SNT, Louisville, CO) uses optical referencing and tracking. Registration was performed for each of the systems using adhesive fiducial markers, cranial-implanted markers, anatomic landmarks, or a combination thereof. Preoperative imaging consisted of volumetric computed tomography, magnetic resonance imaging, or both. Calculated accuracy was given by each of the systems as the root mean square after registration. Surgical accuracy was assessed by comparing the anatomic accuracy of each system with a number of recognizable intraoperative anatomic landmarks RESULTS: Calculated accuracy (root mean square) was 1.4 ± 0.6 mm using the magnetic system and 1.4 ± 0.8 mm using the optical tracking system. In the 42 patients with implanted cranial fiducials, the calculated accuracies were 1.0 ± 0.5 mm (magnetic) and 0.9 ± 0.4 mm (optical). True surgical accuracy was considered good (3 mm or less) in both systems in 60 of 70 patients. In two patients, neither system was accurate. In eight patients, one of the two systems was considered inaccurate. Of these, the magnetic system was considered inaccurate three times and the optical system five times. CONCLUSION: Magnetic referencing and tracking was found to be comparable with optical tracking both with regard to calculated and true surgical accuracy. Interference from metal objects in the magnetic field was seen rarely.

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A Facile Magnetic System for Tracking of Medical Devices

Advanced Materials Technologies ◽

10.1002/admt.202100346 ◽

2021 ◽

pp. 2100346

Author(s):

Liam Swanepoel ◽

Nouf Alsharif ◽

Alexander Przybysz ◽

Pieter Fourie ◽

Pierre Goussard ◽

...

Keyword(s):

Medical Devices ◽

Magnetic System

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Ultrastructural changes in murine lymphoma cells exposed to ultraviolet-A radiation

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010008482x ◽

1991 ◽

Vol 49 ◽

pp. 104-105

Author(s):

Delma P. Thomas ◽

Dianne E. Godar

Keyword(s):

Medical Devices ◽

Blood Cells ◽

White Blood Cells ◽

Consumer Products ◽

Ultrastructural Changes ◽

Ultraviolet A ◽

Uv Spectrum ◽

Lymphoma Cells ◽

Murine Lymphoma ◽

Transmission Electron

Ultraviolet radiation (UVR) from all three waveband regions of the UV spectrum, UVA (320-400 nm), UVB (290-320 nm), and UVC (200-290 nm), can be emitted by some medical devices and consumer products. Sunlamps can expose the blood to a considerable amount of UVR, particularly UVA and/or UVB. The percent transmission of each waveband through the epidermis to the dermis, which contains blood, increases in the order of increasing wavelength: UVC (10%) < UVB (20%) < UVA (30%). To investigate the effects of UVR on white blood cells, we chose transmission electron microscopy to examine the ultrastructure changes in L5178Y-R murine lymphoma cells.

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Bacterial biofilm behavior in water-supply lines of dental units

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100124811 ◽

1992 ◽

Vol 50 (1) ◽

pp. 882-883

Author(s):

B.D. Tall ◽

K.S. George ◽

R. T. Gray ◽

H.N. Williams

Keyword(s):

Water Supply ◽

Medical Devices ◽

Biofilm Formation ◽

Bacterial Biofilm

Studies of bacterial behavior in many environments have shown that most organisms attach to surfaces, forming communities of microcolonies called biofilms. In contaminated medical devices, biofilms may serve both as reservoirs and as inocula for the initiation of infections. Recently, there has been much concern about the potential of dental units to transmit infections. Because the mechanisms of biofilm formation are ill-defined, we investigated the behavior and formation of a biofilm associated with tubing leading to the water syringe of a dental unit over a period of 1 month.

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