Int J Comput Assist Radiol Surg - PNist: interactive volumetric measurements of plexiform neurofibromas in MRI scans.

Tópicos

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Resumo

RPOSE: Volumetric measurements of plexiform neurofibromas (PNs) are time consuming and error prone, as they require the delineation of the PN boundaries, which is mostly impractical in the daily clinical setup. Accurate volumetric measurements are seldom performed for these tumors mainly due to their great dispersion, size and multiple locations. This paper presents a semiautomatic method for segmentation of PN from STIR MRI scans.METHODS: Plexiform neurofibroma interactive segmentation tool (PNist) is a new tool to segment PNs in STIR MRI scans. The method is based on histogram tumor models computed from a training set.RESULTS: Experimental results from 28 datasets show an average absolute volume difference of 6.8 % with an average user time of approximately 7 min versus more than 13 min with manual delineation. In complex cases, the PNist user time is less than half in compared to state-of-the-art tools.CONCLUSIONS: PNist is a new method for the semiautomatic segmentation of PN lesions. Its simplicity and reliability make it unique among other state-of-the-art methods. It has the potential to become a clinical tool that allows the reliable evaluation of PN burden and progression.

Resumo Limpo

rpose volumetr measur plexiform neurofibroma pns time consum error prone requir delin pn boundari most impract daili clinic setup accur volumetr measur seldom perform tumor main due great dispers size multipl locat paper present semiautomat method segment pn stir mri scansmethod plexiform neurofibroma interact segment tool pnist new tool segment pns stir mri scan method base histogram tumor model comput train setresult experiment result dataset show averag absolut volum differ averag user time approxim min versus min manual delin complex case pnist user time less half compar stateoftheart toolsconclus pnist new method semiautomat segment pn lesion simplic reliabl make uniqu among stateoftheart method potenti becom clinic tool allow reliabl evalu pn burden progress

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