Int J Comput Assist Radiol Surg - Fully automatic model-based calcium segmentation and scoring in coronary CT angiography.

Tópicos

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Resumo

RPOSE: The paper presents new methods for automatic coronary calcium detection, segmentation and scoring in coronary CT angiography (cCTA) studies.METHODS: Calcium detection and segmentation are performed by modeling image intensity profiles of coronary arteries. The scoring algorithm is based on a simulated unenhanced calcium score (CS) CT image, constructed by virtually removing the contrast media from cCTA. The methods are implemented as part of a fully automatic system for CS assessment from cCTA.RESULTS: The system was tested in two independent clinical trials on 263 studies and demonstrated 0.95/0.91 correlation between the CS computed from cCTA and the standard Agatston score derived from unenhanced CS CT. The mean absolute percent difference (MAPD) of 36/39 % between the two scores lies within the error range of the standard CS CT (15-65 %).CONCLUSIONS: High diagnostic performance, combined with the benefits of the fully automatic solution, suggests that the proposed technique can be used to eliminate the need in a separate CS CT scan as part of the cCTA examination, thus reducing the radiation exposure and simplifying the procedure.

Resumo Limpo

rpose paper present new method automat coronari calcium detect segment score coronari ct angiographi ccta studiesmethod calcium detect segment perform model imag intens profil coronari arteri score algorithm base simul unenhanc calcium score cs ct imag construct virtual remov contrast media ccta method implement part fulli automat system cs assess cctaresult system test two independ clinic trial studi demonstr correl cs comput ccta standard agatston score deriv unenhanc cs ct mean absolut percent differ mapd two score lie within error rang standard cs ct conclus high diagnost perform combin benefit fulli automat solut suggest propos techniqu can use elimin need separ cs ct scan part ccta examin thus reduc radiat exposur simplifi procedur

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