Int J Med Robot - Anatomical landmarks for point-matching registration in image-guided neurosurgery.

Tópicos

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Resumo

CKGROUND: Accurate patient to image registration is the core for successful image-guided neurosurgery. While skin adhesive markers (SMs) are widely used in point-matching registration, a proper implementation of anatomical landmarks (ALs) may overcome the inconvenience brought by the use of SMs.METHODS: Using nine ALs, a set of three configurations of different combinations of them is proposed. These configurations are defined according to the required positioning of the patient's head during surgery and the resulting distribution of the expected target registration error (TRE). These configurations were first evaluated by simulation experiment using the data of 20 patients from two hospitals, and then testing the applicability of them in eight real clinical surgeries of neuronavigation.RESULTS: The results of the simulation experiment showed that, by incorporating a fiducial registration error (FRE) of 3.5 mm measured in the clinical setting, the expected TRE in the whole skull was less than 2.5 mm, and the expected TRE in the whole brain was less than 1.75 mm when using all the nine ALs. A small TRE could also be achieved in the corresponding surgical field by using the other three configurations with less ALs. In the clinical experiment, the FLE ranges in the image and the patient space were 1.4-3.6 mm and 1.6-5.5 mm, respectively. The measured TRE and FRE were 3.1?0.75 mm and 3.5?0.17 mm, respectively.CONCLUSIONS: The AL configurations proposed in this investigation provide sufficient registration accuracy and can help to avoid the disadvantages of SMs if used clinically.

Resumo Limpo

ckground accur patient imag registr core success imageguid neurosurgeri skin adhes marker sms wide use pointmatch registr proper implement anatom landmark al may overcom inconveni brought use smsmethod use nine al set three configur differ combin propos configur defin accord requir posit patient head surgeri result distribut expect target registr error tre configur first evalu simul experi use data patient two hospit test applic eight real clinic surgeri neuronavigationresult result simul experi show incorpor fiduci registr error fre mm measur clinic set expect tre whole skull less mm expect tre whole brain less mm use nine al small tre also achiev correspond surgic field use three configur less al clinic experi fle rang imag patient space mm mm respect measur tre fre mm mm respectivelyconclus al configur propos investig provid suffici registr accuraci can help avoid disadvantag sms use clinic

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