HOME >> BIOLOGY >> NEWS
Microsurgery Made More Accurate With Virtual Measuring Tool

[From Proceedings of the Human Factors Society 41st Annual Meeting, September 22-26, 1997. Copyright by the Human Factors and Ergonomics Society, P.O. Box 1369, Santa Monica, CA 90406- 1369 USA; 310/394-1811, fax 310/394-2410, http://hfes.org. The complete article, including tables and figures, is available on request from HFES.]

Computer Assisted 3D Measurements for Micro-Surgery

Miriam Kim, Paul Milgram, James M. Drake, University of Toronto, Ontario, Canada

Abstract

A unique measuring tool, the Virtual Tape Measure (VTM), was developed in prototype form to minimize the inaccuracy surgeons encounter when trying to estimate the measurement of structures seen under the operating microscope. Superimposed on a stereo- video image of the surgical field taken through an operating microscope, the VTM is a three-dimensional measuring tool comprising a stereo-computer graphic pointer and a tethering line. The human operator simply places the VTM pointer adjacent two points he wishes to measure on the stereo-video image by controlling a three degrees of freedom (x, y, z-axes) input device. Active liquid shutter glasses must be worn to visualize the pointer and video images in stereo. To test the accuracy of the system, seven subjects used the VTM to measure distances between two dot models placed under the operating microscope. The absolute distance between the two dots ranged from 4 mm to 27 mm in a field of view measuring 20 mm x 30 mm. The distance in depth between the two dots ranged from 0 mm to 19 mm. Overall bias was an overestimation of 0.3 mm with a 95% confidence interval of 0.1 mm to 0.5 mm. The overall precision, as defined by variance of the error was 0.4 mm with a 95% confidence interval of 0.3 to 0.6 mm. Testing shows the VTM prototype system to be an accurate and reliable tool for measuring small objects with size scales typically encountered under the operating microscope during surgical procedures.

I. I
'"/>

Contact: Lois Smith
hfes@compuserve.com
310/394-1811
Human Factors and Ergonomics Society
5-Feb-1998


Page: 1 2 3 4 5 6 7 8

Related biology news :

1. Dual Control Strategy Assures Accurate Cellular Marching Orders, But A Pathogenic Microbe Can Hijack The System
2. New Biological Markers Accurately Predict Prognosis In Head And Neck Cancer Patients, Find University Of Pittsburgh Cancer Institute Researchers
3. New Ultrasensitive Technique For Accurately Characterizing Biomolecules Is Developed By Cornell Chemists
4. Virtual counselor supplements traditional genetic counseling
5. European Virtual Institute for Genome Annotation receives 12 million Euro
6. Gastrointestinal specialists comment on new study on Virtual colonoscopy
7. Virtual cells help unravel cell motion
8. Virtual lung models every breath you take - and its impact
9. Virtual reality tool quantifies physics of a doctors touch
10. Virtual reality training tool pits emergency rescue teams against computerized terrorist attack
11. University-Industry-Government Institute Will Study Pollution Control Chemistry In A Unique Virtual Collaboration

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:5/28/2020)... ... 27, 2020 , ... CrucialTrak, a global designer and manufacturer of biometric access ... (CEG) to market and sell its complete line of biometric readers and access ... infrastructure optimization solutions . , Brett Mason, CrucialTrak’s Director of Channel Sales for ...
(Date:5/28/2020)... ... May 28, 2020 , ... Actuate Therapeutics, ... their 1801 Phase 1/2 study (NCT03678883, EudraCT #: 2018-003739-32) will be presented at ... place virtually on May 29th, 2020. Dr. Benedito Carneiro, Brown University’s principal investigator ...
(Date:5/21/2020)... ... May 21, 2020 , ... ... background and medical screening, announces the launch of a testing service aimed ... safe. The new service is provided by ClearStar’s Medical Information Services (“MIS”) ...
Breaking Biology News(10 mins):
(Date:6/23/2020)... ... 23, 2020 , ... Kerafast Inc. , developers of ... the availability of the Delta-G-VSV Pseudotyping System for coronavirus research applications. The system, ... SARS-CoV-2 viral entry and COVID-19 vaccine effectiveness at just biosafety level 2 (BSL-2) ...
(Date:6/23/2020)... ... June 22, 2020 , ... Dracen Pharmaceuticals Inc., announced today ... 22-24 during the American Association for Cancer Research Virtual meeting. One poster describes ... consistent single agent activity in KEAP1 mutant tumor models of NSCLC. ...
(Date:6/11/2020)... ... , ... Greffex, a leading genetic engineering company, with the ... vectors, recently announced a key manufacturing agreement with FUJIFILM Diosynth Biotechnologies to produce ... successful gene therapy delivery vehicle (vector) with broad applications for delivering treatments including ...
(Date:6/11/2020)... ... 2020 , ... Reducing carbon emissions has been and will continue to be ... market dips, ways to reduce CO2 is something we can’t avoid. , To ... biofuels being produced today are created from recycled cooking oil or crops. Unfortunately, these ...
Breaking Biology Technology:
Cached News: