Int J Med Robot - Evaluation of the factors affecting the optimal fiducial configurations calculated through a genetic-algorithm-based methodology in image-guided neurosurgery.

Tópicos

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Resumo

CKGROUND: Image-guided neurosurgery usually involves a point-pair registration between two spaces, associating the patient in the operating room with pre-operative image scans. The distribution and number of fiducial markers during registration are critical for the expected error at the target point.METHODS: A genetic algorithm has been designed to provide an optimal marker configuration. The solution, visualized on a 3D head reconstruction, is intended as a guideline for the surgeon to properly place the markers. However, deviations from ideal configurations occur during marker placement; moreover, the actual target is not a point, but a region. The consequent decrease of target accuracy is statistically investigated.RESULTS: A requirement on target minimum accuracy can be satisfied in the operating room not only by setting the number of markers for the optimized fiducial configuration, but also by considering the inevitable sources of error.CONCLUSIONS: Quantifying the sources of error that affect a genetic-algorithm-based optimization shows that it is still convenient. Target point correct individuation is particularly important, as it strongly influences the optimization performance.

Resumo Limpo

ckground imageguid neurosurgeri usual involv pointpair registr two space associ patient oper room preoper imag scan distribut number fiduci marker registr critic expect error target pointmethod genet algorithm design provid optim marker configur solut visual d head reconstruct intend guidelin surgeon proper place marker howev deviat ideal configur occur marker placement moreov actual target point region consequ decreas target accuraci statist investigatedresult requir target minimum accuraci can satisfi oper room set number marker optim fiduci configur also consid inevit sourc errorconclus quantifi sourc error affect geneticalgorithmbas optim show still conveni target point correct individu particular import strong influenc optim perform

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