18.3: Tape‐assisted laser transfer techniques for selective transfer of Micro‐LEDs with high placement accuracy

2021 ◽  
Vol 52 (S2) ◽  
pp. 242-243
Author(s):  
Zhangxu Pan ◽  
Chan Guo ◽  
Zheng Gong
Keyword(s):  
Selective Transfer ◽  
Laser Transfer ◽  
Placement Accuracy

Augmented reality–assisted pedicle screw insertion: a cadaveric proof-of-concept study

2019 ◽  
Vol 31 (1) ◽  
pp. 139-146 ◽  
Author(s):  
Camilo A. Molina ◽  
Nicholas Theodore ◽  
A. Karim Ahmed ◽  
Erick M. Westbroek ◽  
Yigal Mirovsky ◽  
...  
Keyword(s):  
Augmented Reality ◽  
Pedicle Screw ◽  
User Experience ◽  
Pedicle Screws ◽  
Screw Insertion ◽  
Pedicle Screw Insertion ◽  
Insertion Method ◽  
Comparative Accuracy ◽  
Placement Accuracy ◽  
Surgical Field

OBJECTIVEAugmented reality (AR) is a novel technology that has the potential to increase the technical feasibility, accuracy, and safety of conventional manual and robotic computer-navigated pedicle insertion methods. Visual data are directly projected to the operator’s retina and overlaid onto the surgical field, thereby removing the requirement to shift attention to a remote display. The objective of this study was to assess the comparative accuracy of AR-assisted pedicle screw insertion in comparison to conventional pedicle screw insertion methods.METHODSFive cadaveric male torsos were instrumented bilaterally from T6 to L5 for a total of 120 inserted pedicle screws. Postprocedural CT scans were obtained, and screw insertion accuracy was graded by 2 independent neuroradiologists using both the Gertzbein scale (GS) and a combination of that scale and the Heary classification, referred to in this paper as the Heary-Gertzbein scale (HGS). Non-inferiority analysis was performed, comparing the accuracy to freehand, manual computer-navigated, and robotics-assisted computer-navigated insertion accuracy rates reported in the literature. User experience analysis was conducted via a user experience questionnaire filled out by operators after the procedures.RESULTSThe overall screw placement accuracy achieved with the AR system was 96.7% based on the HGS and 94.6% based on the GS. Insertion accuracy was non-inferior to accuracy reported for manual computer-navigated pedicle insertion based on both the GS and the HGS scores. When compared to accuracy reported for robotics-assisted computer-navigated insertion, accuracy achieved with the AR system was found to be non-inferior when assessed with the GS, but superior when assessed with the HGS. Last, accuracy results achieved with the AR system were found to be superior to results obtained with freehand insertion based on both the HGS and the GS scores. Accuracy results were not found to be inferior in any comparison. User experience analysis yielded “excellent” usability classification.CONCLUSIONSAR-assisted pedicle screw insertion is a technically feasible and accurate insertion method.

scholarly journals Selective Transfer of Cyclopropane Acids by Acyl Coenzyme A:Phospholipid Acyltransferases

1969 ◽  
Vol 244 (23) ◽  
pp. 6514-6519 ◽  
Author(s):  
Harumi Okuyama ◽  
William E.M. Lands ◽  
William W. Christie ◽  
Frank D. Gunstone
Keyword(s):  
Selective Transfer

Cortrak feeding tube placement: accuracy of the ‘GI flexure system’ versus manufacturer guidance

2020 ◽  
Vol 29 (21) ◽  
pp. 1277-1281
Author(s):  
Stephen Taylor ◽  
Alex Manara ◽  
Jules Brown ◽  
Kaylee Sayer ◽  
Rowan Clemente ◽  
...  
Keyword(s):  
Feeding Tube ◽  
Tube Placement ◽  
Gastric Body ◽  
Major Morbidity ◽  
System Versus ◽  
Placement Accuracy ◽  
Feeding Tube Placement ◽  
Left Quadrant

Electromagnetic (EM) guided enteral tube placement may reduce lung misplacement to almost zero in expert centres, but more than 60 undetected misplacements had occurred by 2016 resulting in major morbidity or death. Aim: Determine the accuracy of manufacturer guidance in trace interpretation against what is referred to as the ‘GI flexure system’. Methods: The authors prospectively observed the accuracy of the ‘GI flexure system’ of trace interpretation against manufacturer guidance in primary nasointestinal (NI) tube placements. Findings: Contrary to manufacturer guidance, 33% of traces deviated >5 cm from the sagittal midline and 26.5% were oesophageal when entering the lower left quadrant, incorrectly indicating lung and gastric placement, respectively. Conversely, the GI flexure system identified ≥99.4% of GI traces when they reached the gastric body flexure; 100% at the superior duodenal flexure. All lung misplacements were identified by the absence of GI flexures. Conclusion: Current manufacturer guidance should be updated to the GI flexure system of interpretation.

scholarly journals Needle placement accuracy in CT-guided robotic post mortem biopsy

2020 ◽  
Vol 6 (1) ◽  
Author(s):  
Martin Gromniak ◽  
Maximilian Neidhardt ◽  
Axel Heinemann ◽  
Klaus Püschel ◽  
Alexander Schlaefer
Keyword(s):  
Needle Biopsy ◽  
Minimal Invasive ◽  
Robotic Arm ◽  
Limited Time ◽  
Time Since Death ◽  
Time Cost ◽  
Needle Placement ◽  
Manner Of Death ◽  
Ct Guided ◽  
Placement Accuracy

AbstractForensic autopsies include a thorough examination of the corpse to detect the source or alleged manner of death as well as to estimate the time since death. However, a full autopsy may be not feasible due to limited time, cost or ethical objections by relatives. Hence, we propose an automated minimal invasive needle biopsy system with a robotic arm, which does not require any online calibrations during a procedure. The proposed system can be easily integrated into the workflow of a forensic biopsy since the robot can be flexibly positioned relative to the corpse. With our proposed system, we performed needle insertions into wax phantoms and livers of two corpses and achieved an accuracy of 4.34 ± 1.27 mm and 10.81 ± 4.44 mm respectively.

Sea Spray Aerosol Chamber Study on Selective Transfer and Enrichment of Free and Combined Amino Acids

2021 ◽  
Author(s):  
Nadja Triesch ◽  
Manuela van Pinxteren ◽  
Matthew Salter ◽  
Christian Stolle ◽  
Ryan Pereira ◽  
...  
Keyword(s):  
Amino Acids ◽  
Sea Spray ◽  
Selective Transfer ◽  
Chamber Study ◽  
Sea Spray Aerosol ◽  
Aerosol Chamber

In-depth investigation of a third body formed by selective transfer in a NiCr / AgPd electrical contact

Wear ◽  
2021 ◽  
pp. 203753
Author(s):  
Manon Isard ◽  
Imène Lahouij ◽  
Jean-Michel Lanot ◽  
Pierre Montmitonnet
Keyword(s):  
Electrical Contact ◽  
Selective Transfer ◽  
Third Body

scholarly journals Application of Intraoperative CT-Guided Navigation in Simultaneous Minimally Invasive Anterior and Posterior Surgery for Infectious Spondylitis

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Meng-Huang Wu ◽  
Navneet Kumar Dubey ◽  
Ching-Yu Lee ◽  
Yen-Yao Li ◽  
Chin-Chang Cheng ◽  
...  
Keyword(s):  
Minimally Invasive ◽  
Pedicle Screws ◽  
Ct Guided ◽  
Posterior Surgery ◽  
Intraoperative Computed Tomography ◽  
Reactive Protein ◽  
Angle Correction ◽  
Average Operative Time ◽  
Placement Accuracy ◽  
Infectious Spondylitis

This study was aimed at evaluating the safety and efficacy of using intraoperative computed tomography- (iCT-) guided navigation in simultaneous minimally invasive anterior and posterior surgery for infectious spondylitis. Nine patients with infectious spondylitis were enrolled in this study. The average operative time was 327.6 min (range, 210–490) and intraoperative blood loss was 407 cc (range, 50–1,200). The average duration of hospital stay was 48.9 days (range, 11–76). Out of a total of 54 pedicle screws employed, 53 screws (98.1%) were placed accurately. A reduced visual analog scale on back pain (from 8.2 to 2.2) and Oswestry disability index (from 67.1% to 25.6%) were found at the 2-year follow-up. All patients had achieved resolution of spinal infection with reduced average erythrocyte sedimentation rate (from 83.9 to 14.1 mm/hr) and average C-reactive protein (from 54.4 to 4.8 mg/dL). Average kyphotic angle correction was 10.5° (range, 8.4°–12.6°) postoperatively and 8.5° (range, 6.9°–10.1°) after 2 years. In conclusion, the current iCT-guided navigation approach has been demonstrated to be an alternative method during simultaneous minimally invasive anterior and posterior surgery for infectious spondylitis. It can provide a good intraoperative orientation and visualization of anatomic structures and also a high pedicle screw placement accuracy in patient’s lateral decubitus position.

Organic Light Emitting Material Direct Writing by Nanomaterial Enabled Laser Transfer

2009 ◽  
Vol 1179 ◽  
Author(s):  
Seung Hwan Ko ◽  
Heng Pan ◽  
Nipun Misra ◽  
Costas Grigoropoulos
Keyword(s):  
Mass Production ◽  
Laser Energy ◽  
Light Emitting Diode ◽  
Nanoparticle Size ◽  
Temperature Sensitive ◽  
Conductive Heat ◽  
Direct Writing ◽  
Light Emitting ◽  
Laser Transfer ◽  
Organic Light

AbstractOrganic light emitting material direct writing is demonstrated based on nanomaterial enabled laser transfer. Through utilization of proper nanoparticle size and type, and the laser wavelength choice, a single laser pulse could transfer well defined and arbitrarily shaped tris-(8-hydroxyquinoline)Al patterns ranging from several microns to millimeter size. The unique properties of nanomaterials allow laser induced forward transfer at low laser energy (0.05 J/cm2) while maintaining good fluorescence. The technique may be well suited for the mass production of temperature sensitive organic light emitting devices.The combined effects of melting temperature depression, lower conductive heat transfer loss, strong absorption of the incident laser beam, and relatively weak bonding between nanoparticles during laser irradiation result in the transfer of patterns with very sharp edges at relatively lower laser energy than commonly used, thus inducing minimal damage to the target organic light emitting diode material with no evidence of cracks. This technique can be applied to a broad range of laser wavelengths with proper selection of nanoparticle size and size distribution, as well as the material type. Additionally, nanomaterial enabled laser transfer may be particularly advantageous for the mass production of temperature sensitive devices.

A Hollow in Hollow Nanoreactor of H-PtCu@SiO2 for the Selective Transfer Hydrogenation

2021 ◽  
pp. 131417
Author(s):  
Rongxiu Guo ◽  
Xinyue Zhang ◽  
Ze-Nan Hu ◽  
Hong Li ◽  
Jianyi Gao ◽  
...  
Keyword(s):  
Transfer Hydrogenation ◽  
Selective Transfer
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