Int J Med Robot - Referencing of markerless CT data sets with cone beam subvolume including registration markers to ease computer-assisted surgery - a clinical and technical research.

Tópicos

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Resumo

CKGROUND: As a prerequisite in navigation-assisted surgery, a three-dimensional image data set with registration marker is necessary. Often patients are presented, not being aware of facing a computer-assisted surgical intervention (CAS), with an already performed computed tomography (CT) data set without marker. The aim of this study was to evaluate the accuracy of a new method which allows performing CAS by enhancing the initial markerless data set with a marked subvolume gained by cone beam (CBCT) scan.METHODS: Therefore four registration markers are inserted and afterwards the patient is strongly limited to the field of interest scanned by CBCT scan (marked data set). Superimposed with the initial data set, a data set with reference markers and with full information is obtained. Registration procedure was performed with group A (25 patients, superimposed marked CBCT scan) and group B (25 patients, initially marked CT scan) using BrainLab? navigation by two observers and overall system accuracy was measured using the registration landmarks and additional intraoperative landmarks (tooth cusps).RESULTS: Adequate image quality assumed, no significant difference between group A and B was detected. Enhancing an initially performed data set with registration marker by using a marked subvolume could improve the workflow for navigation-assisted surgery due to the availability of cone beam scan technology, provide excellent resolution with reduced metal artifacts nearby dental restorations, and reduce radiation dose for the patient.CONCLUSION: Regarding the advantages of the new method which allows performing CAS by enhancing the initial markerless data set with a marked subvolume gained by cone beam (CBCT) scan, this technique will play a major part in navigation-assisted surgery and will address widespread general methodological solutions that are of great interest in multidisciplinary treatment.

Resumo Limpo

ckground prerequisit navigationassist surgeri threedimension imag data set registr marker necessari often patient present awar face computerassist surgic intervent cas alreadi perform comput tomographi ct data set without marker aim studi evalu accuraci new method allow perform cas enhanc initi markerless data set mark subvolum gain cone beam cbct scanmethod therefor four registr marker insert afterward patient strong limit field interest scan cbct scan mark data set superimpos initi data set data set refer marker full inform obtain registr procedur perform group patient superimpos mark cbct scan group b patient initi mark ct scan use brainlab navig two observ overal system accuraci measur use registr landmark addit intraop landmark tooth cuspsresult adequ imag qualiti assum signific differ group b detect enhanc initi perform data set registr marker use mark subvolum improv workflow navigationassist surgeri due avail cone beam scan technolog provid excel resolut reduc metal artifact nearbi dental restor reduc radiat dose patientconclus regard advantag new method allow perform cas enhanc initi markerless data set mark subvolum gain cone beam cbct scan techniqu will play major part navigationassist surgeri will address widespread general methodolog solut great interest multidisciplinari treatment

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