Wide and narrow dual image guidance system for ground vehicle on fast focusing and stereo matching operation

This work aimed to develop an autonomous system for unmanned aerial vehicles (UAVs) to land on moving platforms such as an automobile or a marine vessel, providing a promising solution for a long-endurance flight operation, a large mission coverage range, and a convenient recharging ground station. Unlike most state-of-the-art UAV landing frameworks that rely on UAV onboard computers and sensors, the proposed system fully depends on the computation unit situated on the ground vehicle/marine vessel to serve as a landing guidance system. Such a novel configuration can therefore lighten the burden of the UAV, and the computation power of the ground vehicle/marine vessel can be enhanced. In particular, we exploit a sensor fusion-based algorithm for the guidance system to perform UAV localization, whilst a control method based upon trajectory optimization is integrated. Indoor and outdoor experiments are conducted, and the results show that precise autonomous landing on a 43 cm × 43 cm platform can be performed.

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3D ultrasound image guidance system used in RF uterine adenoma and uterine bleeding ablation system

10.1117/12.652639 ◽

2006 ◽

Cited By ~ 1

Author(s):

Mingyue Ding ◽

Xiaoan Luo ◽

Chao Cai ◽

Chengping Zhou ◽

Aaron Fenster

Keyword(s):

Image Guidance ◽

Ultrasound Image ◽

3D Ultrasound ◽

Uterine Bleeding ◽

Guidance System

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Evaluation of an augmented reality based image guidance system for laparoscopic liver surgery

HPB ◽

10.1016/j.hpb.2019.10.471 ◽

2019 ◽

Vol 21 ◽

pp. S671-S672

Author(s):

C. Schneider ◽

S. Thompson ◽

K. Gurusamy ◽

D. Stoyanov ◽

D.J. Hawkes ◽

...

Keyword(s):

Augmented Reality ◽

Liver Surgery ◽

Image Guidance ◽

Guidance System ◽

Laparoscopic Liver Surgery

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Comparison of Endoscopic Sinus Surgery with and without Image Guidance

American Journal of Rhinology ◽

10.1177/194589240201600403 ◽

2002 ◽

Vol 16 (4) ◽

pp. 193-197 ◽

Cited By ~ 81

Author(s):

Marvin P. Fried ◽

Vik M. Moharir ◽

Jennifer Shin ◽

Marta Taylor-Becker ◽

Paul Morrison ◽

...

Keyword(s):

Endoscopic Sinus Surgery ◽

Image Guidance ◽

Operative Time ◽

Tertiary Care ◽

Guidance System ◽

Sinus Surgery ◽

Control Group ◽

Repeat Surgery ◽

Patient Profile ◽

Estimated Blood Loss

Background Image guidance based on preacquired computed tomography scans of the patient is a technique used to assist the physician during endoscopic sinus surgery (ESS). This study seeks to compare ESS with and without image guidance, analyzing a number of parameters that can impact on efficacy. Methods Retrospective chart review took place at a tertiary care referral center. The study group consisted of 97 consecutive patients confirmed to have undergone ESS using an electromagnetic intraoperative image guidance system (IGS). The control group consisted of 61 consecutive patients who underwent ESS, before the IGS was available at the study hospital. The main outcomes measured were analysis of patient profile, including coexisting conditions such as asthma and polyposis, assessment of which specific sinuses underwent surgical treatment; major and minor complications; estimated blood loss (EBL); operative time; and the need for repeat surgery. Results The IGS group had 74% of patients with polyposis; more sinuses, on average, which underwent surgical revision; one major and three minor complications; an average EBL of 134 cc, an average procedure time of 154 minutes; and one patient who needed repeat surgery in a 3-month follow-up period. The non-IGS group had 40% of patients with polyposis; seven major complications and one minor complication; an average EBL of 94 cc; and three patients who needed repeat surgery within 3 months. Conclusions The use of an IGS for endoscopic sinus surgery may reduce the complications associated with the procedure and allow for a more thorough operation. However, operative time and EBL may be increased.

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Placement of thoracic transvertebral pedicle screws using 3D image guidance

Journal of Neurosurgery Spine ◽

10.3171/2013.2.spine12819 ◽

2013 ◽

Vol 18 (5) ◽

pp. 479-483 ◽

Cited By ~ 19

Author(s):

Eric W. Nottmeier ◽

Stephen M. Pirris

Keyword(s):

Pedicle Screw ◽

Image Guidance ◽

Pedicle Screws ◽

Guidance System ◽

Ct Scans ◽

Screw Placement ◽

Clinical Consequence ◽

3D Image ◽

Cortical Layers ◽

Disc Space

Object Transvertebral pedicle screws have successfully been used in the treatment of high-grade L5–S1 spondylolisthesis. An advantage of transvertebral pedicle screws is the purchase of multiple cortical layers across 2 vertebrae, thereby increasing the stability of the construct. At the lumbosacral junction, transvertebral pedicle screws have been shown to be biomechanically superior to pedicle screws placed in the standard fashion. The use of transvertebral pedicle screws at spinal levels other than L5–S1 has not been reported in the literature. The authors describe their technique of transvertebral pedicle screw placement in the thoracic spine using 3D image guidance. Methods Twelve patients undergoing cervicothoracic or thoracolumbar fusion had 41 thoracic transvertebral pedicle screws placed across 26 spinal levels using this technique. Indications for placement of thoracic transvertebral pedicle screws in earlier cases included osteoporosis and pedicle screw salvage. However, in subsequent cases screws were placed in patients undergoing multilevel thoracolumbar fusion without osteoporosis, particularly near the top of the construct. Image guidance in this study was accomplished using the Medtronic StealthStation S7 image guidance system used in conjunction with the O-arm. All patients were slated to undergo postoperative CT scanning at approximately 4–6 months for fusion assessment, which also allowed for grading of the transvertebral pedicle screws. Results No thoracic transvertebral pedicle screw placed in this study had to be replaced or repositioned after intraoperative review of the cone beam CT scans. Review of the postoperative CT scans revealed all transvertebral screws to be across the superior disc space with the tips in the superior vertebral body. Six pedicle screws were placed using the in-out-in technique in patients with narrow pedicles, leaving 35 screws that underwent breach analysis. No pedicle breach was noted in 34 of 35 screws. A Grade 1 (< 2 mm) medial breach was noted in 1 screw without clinical consequence. Solid fusion was observed across 25 of 26 spinal levels that underwent transvertebral screw placement including 7 spinal levels located at the top of a multilevel construct. Conclusions This report describes the authors' initial in vivo experience with the 3D image-guided placement of 41 thoracic transvertebral pedicle screws. Advantages of thoracic transvertebral screws include the purchase of 2 vertebral segments across multiple cortical layers. A high fusion rate was observed across spinal levels in which transvertebral screws were placed. A formal biomechanical study is needed to assess the biomechanical advantages of this technique and is currently being planned.

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