Comput. Aided Surg. - Effect of registration mode on neuronavigation precision: an exploration of the role of random error.

Tópicos

{ imag(1057) registr(996) error(939) }
{ high(1669) rate(1365) level(1280) }
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Resumo

The aim of this paper is to analyze the variations in registration accuracy for computer-assisted surgical navigation using three different modes of registration, in order to explore the behavior of random error, and to highlight the precision of neuronavigation as a concept distinct from accuracy. The operational accuracy of three different registration modes (bone fiducials, scalp adhesive fiducials and an auto-registration mask) was evaluated in a total of 20 fresh cadaveric heads. The precision of the neuronavigation system was then assessed by evaluating the variation in the accuracy measurements associated with each registration mode. The coefficient of variation was employed to quantify the degree of variation in the attained accuracy using the following formula: Coefficient of variation=standard deviation/mean*100. For external targets, the precision of the neuronavigation system was greatest with mask registration (43.75 and 51.41 for anterior and posterior external targets, respectively) and lowest with bone registration (65.30 and 67.17 for anterior and posterior external targets, respectively). For internal targets, the precision of the neuronavigation system was greatest with bone registration (47.69 and 42.6 for anterior and posterior internal targets, respectively) and lowest with mask registration (62.9 and 58.67 for anterior and posterior internal targets, respectively). The precision (reproducibility) of the neuronavigation system is another important quantity besides accuracy that characterizes the performance of the system. Understanding both of these quantities for a given registration mode enhances the use of a neuronavigation system in neurosurgery.

Resumo Limpo

aim paper analyz variat registr accuraci computerassist surgic navig use three differ mode registr order explor behavior random error highlight precis neuronavig concept distinct accuraci oper accuraci three differ registr mode bone fiduci scalp adhes fiduci autoregistr mask evalu total fresh cadaver head precis neuronavig system assess evalu variat accuraci measur associ registr mode coeffici variat employ quantifi degre variat attain accuraci use follow formula coeffici variationstandard deviationmean extern target precis neuronavig system greatest mask registr anterior posterior extern target respect lowest bone registr anterior posterior extern target respect intern target precis neuronavig system greatest bone registr anterior posterior intern target respect lowest mask registr anterior posterior intern target respect precis reproduc neuronavig system anoth import quantiti besid accuraci character perform system understand quantiti given registr mode enhanc use neuronavig system neurosurgeri

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