Clinical applications of a laser guidance system with dual laser beam rays as augmented reality of surgical navigation

2002 ◽  
pp. 281-284 ◽  
Author(s):  
Nobuhiko Sugano ◽  
Toshihiko Sasama ◽  
Shunsaku Nishihara ◽  
Hisanobu Nakase ◽  
Takashi Nishii ◽  
...  
Keyword(s):  
Augmented Reality ◽  
Laser Beam ◽  
Surgical Navigation ◽  
Clinical Applications ◽  
Guidance System ◽  
Laser Guidance ◽  
Dual Laser

scholarly journals CIGuide: in situ augmented reality laser guidance

2019 ◽  
Vol 15 (1) ◽  
pp. 49-57
Author(s):  
Zoltán Bárdosi ◽  
Christian Plattner ◽  
Yusuf Özbek ◽  
Thomas Hofmann ◽  
Srdjan Milosavljevic ◽  
...  
Keyword(s):  
Augmented Reality ◽  
Skull Base ◽  
Visual Cues ◽  
Needle Insertion ◽  
Guidance System ◽  
Laser Guidance ◽  
End Effector ◽  
Magnetic Tracking ◽  
Lateral Skull Base

Abstract Purpose  A robotic intraoperative laser guidance system with hybrid optic-magnetic tracking for skull base surgery is presented. It provides in situ augmented reality guidance for microscopic interventions at the lateral skull base with minimal mental and workload overhead on surgeons working without a monitor and dedicated pointing tools. Methods  Three components were developed: a registration tool (Rhinospider), a hybrid magneto-optic-tracked robotic feedback control scheme and a modified robotic end-effector. Rhinospider optimizes registration of patient and preoperative CT data by excluding user errors in fiducial localization with magnetic tracking. The hybrid controller uses an integrated microscope HD camera for robotic control with a guidance beam shining on a dual plate setup avoiding magnetic field distortions. A robotic needle insertion platform (iSYS Medizintechnik GmbH, Austria) was modified to position a laser beam with high precision in a surgical scene compatible to microscopic surgery. Results  System accuracy was evaluated quantitatively at various target positions on a phantom. The accuracy found is 1.2 mm ± 0.5 mm. Errors are primarily due to magnetic tracking. This application accuracy seems suitable for most surgical procedures in the lateral skull base. The system was evaluated quantitatively during a mastoidectomy of an anatomic head specimen and was judged useful by the surgeon. Conclusion  A hybrid robotic laser guidance system with direct visual feedback is proposed for navigated drilling and intraoperative structure localization. The system provides visual cues directly on/in the patient anatomy, reducing the standard limitations of AR visualizations like depth perception. The custom- built end-effector for the iSYS robot is transparent to using surgical microscopes and compatible with magnetic tracking. The cadaver experiment showed that guidance was accurate and that the end-effector is unobtrusive. This laser guidance has potential to aid the surgeon in finding the optimal mastoidectomy trajectory in more difficult interventions.

Design and Prototype Development of Quadrant Estimation Unit for Laser Beam Rider Guidance System

2020 ◽  
Vol 9 (03) ◽  
pp. 24970-24977
Author(s):  
Dr. Gunti Avinash ◽  
Saiseshu Reddy ◽  
P. Vijaya Poojitha
Keyword(s):  
Laser Beam ◽  
Beam Quality ◽  
Low Cost ◽  
Essential Element ◽  
Guidance System ◽  
Target Space ◽  
Laser Guidance ◽  
Atmospheric Transmission ◽  
Silicon Photodiode ◽  
Prototype Development

With the development of science and technology, precision-strike weapons are been considered to be important for winning victory and defending the country during war (or) attack. Laser guidance is one of the major methods to execute precision-strike in modern warfare. At present, the problems faced at the primary stage of Laser guidance has been solved with endeavors of countries. Several technical aspects of laser-beam riding guided system have been mature, such as atmosphere penetration of laser beam, clutter inhibition on ground, laser irradiator, encoding and decoding of laser beam. Further, laser beam quality, equal output power and atmospheric transmission properties are qualified for warfare situation. Riding guidance instrument is a crucial element of Laser-beam riding guided system and also in Radar-beam riding guiding system, and is also a essential element of airborne, vehicle-mounted and individual weapon. The optical system mainly consists of sighting module and laser-beam guided module. Photo detector (Quadrant detector) is the most important sensing device, and also the key to acquire the coordinate information of target space. Currently, in consideration of the 1064 nm of wavelength applied in all the semi-active laser guided weapons systems, lithium drifting silicon photodiode which is sensitive to 1064 nm of wavelength is used in photoelectric detector. Compared to Solid and gas laser, diode laser has many merits such as small volume, simple construction, light weight, long life, low cost and easy modulation.  The present work includes the study of Various ATGM, their guidance mechanism, particularly laser beam rider guidance. Study has been carried to understand the composition and operating principle of Laser-beam riding guided system. The present work also deals with prototype development of quadrant estimation unit required for Laser beam rider guidance.

Augmented reality guidance system for peripheral nerve blocks

2010 ◽  
Author(s):  
Chris Wedlake ◽  
John Moore ◽  
Maxim Rachinsky ◽  
Daniel Bainbridge ◽  
Andrew D. Wiles ◽  
...  
Keyword(s):  
Augmented Reality ◽  
Peripheral Nerve ◽  
Guidance System ◽  
Nerve Blocks ◽  
Peripheral Nerve Blocks

Wind turbine power prediction considering wake effects with dual laser beam LiDAR measured yaw misalignment

2021 ◽  
Vol 299 ◽  
pp. 117308
Author(s):  
Xuyang Li ◽  
Yingning Qiu ◽  
Yanhui Feng ◽  
Zheng Wang
Keyword(s):  
Laser Beam ◽  
Wind Turbine ◽  
Power Prediction ◽  
Wake Effects ◽  
Dual Laser

Development of laser guidance system for UAV

2021 ◽  
Vol 2021.59 (0) ◽  
pp. 10a1
Author(s):  
Naoki KAMIO ◽  
Masafumi MIWA ◽  
Yusuke TAKEUCHI
Keyword(s):  
Guidance System ◽  
Laser Guidance

scholarly journals Characterization of dissimilar aluminum-copper material joining by controlled dual laser beam

2021 ◽  
Author(s):  
Joon Ho Cha ◽  
Hae Woon Choi
Keyword(s):  
Laser Beam ◽  
Power Distribution ◽  
Near Infrared ◽  
Weld Zone ◽  
Tensile Tests ◽  
Bead Width ◽  
Single Beam ◽  
The Core ◽  
Beam Laser ◽  
Dual Laser

Abstract Laser technology has many advantages in welding for the manufacture of EV battery packs. Aluminum (Al) and copper (Cu) are welded using a dual laser beam, suggesting the optimum power distribution for the core and ring beams. Due to the very high reflectance of Cu and Al exposed to near-infrared lasers, the material absorbs a very small amount of energy. Compared to single beam laser welding, dual beam welding has significantly improved surface quality by controlling surface solidification. The study focused on the quality of weld surface beads, weld properties and tensile strength by varying the output ratio of the core beam to the ring beam. Optimal conditions of Al6061 were a 700 W core beam, a 500 W ring beam and 200 mm/s of weld speed. For the C1020P, the optimum conditions were a center beam of 2500 W, a ring beam of 3000 W and a welding speed of 200 mm/s. In laser lap welding of Al-Al and Al-Cu, the bead width and the interfacial bead width of the joint increased as the output increased. The penetration depth did not change significantly, but small pores were formed at the interface of the junction. Tensile tests were performed to demonstrate the reliability of the weld zone, and computer simulations provided analysis of the heat distribution for optimal heat input conditions.

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