CENTER CHANNEL POSITIONING APPARATUS

2012 ◽  
Vol 132 (6) ◽  
pp. 4092
Author(s):  
Yoshiki Ohta
Keyword(s):  
Center Channel

Pilot Test of the Trisensor, A New Generation Sonar Sensory Aid

1983 ◽  
Vol 77 (9) ◽  
pp. 446-449 ◽  
Author(s):  
Randolph D. Easton ◽  
Richard M. Jackson
Keyword(s):  
Pilot Study ◽  
High Resolution ◽  
Object Localization ◽  
Pilot Test ◽  
Angle Error ◽  
Space Object ◽  
Near Space ◽  
Side Channels ◽  
Center Channel ◽  
New Generation

This report describes the results of a pilot study undertaken to assess systematically the usability of the Trisensor in near space, object localization tasks. In general, findings support the contention that the high resolution, center channel reduces the degree of angle error when reaching for targets in near space. It was also found that the degree of angle error associated with the binaural side channels could be reduced if targets were moved from the periphery into place during localization.

RENDERING CENTER CHANNEL AUDIO

2012 ◽  
Vol 131 (4) ◽  
pp. 3197
Author(s):  
Mark Stuart Vinton
Keyword(s):  
Center Channel

scholarly journals Traffic and Ratings of Driver Workload: The Effect of the Number of Vehicles and Their Distance Headways

2019 ◽  
Vol 63 (1) ◽  
pp. 2134-2138
Author(s):  
Ke Liu ◽  
Paul Green ◽  
Yili Liu
Keyword(s):  
Driving Simulator ◽  
Visual Scene ◽  
Button Press ◽  
Rating Data ◽  
Center Channel ◽  
Driver Workload ◽  
The Subject ◽  
Lead Vehicle

This experiment examined how variations in traffic affected driver workload. Some 24 subjects, 12 younger, 12 older, drove a driving simulator. There were eight scenarios that involved a lead vehicle, a following vehicle, and up to two vehicles in an adjacent lane, one ahead, one behind. Depending on the condition, the subject rated the workload of driving or the visual scene was periodically occluded (visible for 0.5 s after each button press). Ratings were obtained by showing looped clips of expressway scenes (anchors) below the center channel of the simulator. This paper only discusses the rating data, which were extremely stable and seemingly unaffected by age. The workload increased when distance headway (DHW) decreased. In terms of effect on workload, from greatest to least, they were: lead vehicle, vehicle in adjacent lane – ahead, vehicle in adjacent lane – behind, follow vehicle in the same lane.

The Poised Cannula Technique Reduces the Stereotactic Error of the Fiducial-Less Frameless DBS Procedure

2021 ◽  
pp. 1-9
Author(s):  
Matthew Moser ◽  
Paul Koch ◽  
Harsh P. Shah ◽  
Alen Docef ◽  
Kathryn L. Holloway
Keyword(s):  
Low Dose ◽  
Radial Error ◽  
Lead Placement ◽  
Center Channel ◽  
Time Correction ◽  
Clinically Significant ◽  
Lead Location ◽  
Target Depth ◽  
Potentially Clinically Significant ◽  
Deep Brain

<b><i>Background:</i></b> In this study, we describe a technique of optimizing the accuracy of frameless deep brain stimulation (DBS) lead placement through the use of a cannula poised at the entry to predict the location of the fully inserted device. This allows real-time correction of error prior to violation of the deep gray matter. <b><i>Methods:</i></b> We prospectively gathered data on radial error during the operative placements of 40 leads in 28 patients using frameless fiducial-less DBS surgery. Once the Nexframe had been aligned to target, a cannula was inserted through the center channel of the BenGun until it traversed the pial surface and a low-dose O-arm spin was obtained. Using 2 points along the length of the imaged cannula, a trajectory line was projected to target depth. If lead location could be improved, the cannula was inserted through an alternate track in the BenGun down to target depth. After intraoperative microelectrode recording and clinical assessment, another O-arm spin was obtained to compare the location of the inserted lead with the location predicted by the poised cannula. <b><i>Results:</i></b> The poised cannula projection and the actual implant had a mean radial discrepancy of 0.75 ± 0.64 mm. The poised cannula projection identified potentially clinically significant errors (avg 2.07 ± 0.73 mm) in 33% of cases, which were reduced to a radial error of 1.33 ± 0.66 mm (<i>p</i> = 0.02) after correction using an alternative BenGun track. The final target to implant error for all 40 leads was 1.20 ± 0.52 mm with only 2.5% of errors being &#x3e;2.5 mm. <b><i>Conclusion:</i></b> The poised cannula technique results in a reduction of large errors (&#x3e;2.5 mm), resulting in a decline in these errors to 2.5% of implants as compared to 17% in our previous publication using the fiducial-less method and 4% using fiducial-based methods of DBS lead placement.

Sign in / Sign up

Export Citation Format

Share Document