摘要
Directisosurfacevolumerenderingisthemostprominentmodernmethodformedicaldatavisualization.Itisbasedonfindingintersectionpointsbetweentherayscorrespondingtopixelsonthescreenandisosurface.Thisarticledescribesatwo-passalgorithmforacceleratingthemethodonthegraphicprocessingunit(GPU).Onthefirstpass,theintersectionswiththeisosurfacearefoundonlyforasmallnumberofrays,whichisdonebyrenderingintoalower-resolutiontexture.Onthesecondpass,theobtainedinformationisusedtoefficientlycalculatetheintersectionpointsofalltheother.Thenumberofraystouseduringthefirstpassisdeterminedbyusinganadaptivealgorithm,whichrunsonthecentralprocessingunit(CPU)inparallelwiththesecondpassoftherendering.Theproposedapproachallowstosignificantlyspeedupisosurfacevisualizationwithoutqualityloss.Experimentsshowaccelerationupto10timesincomparisonwithacommonraycastingmethodimplementedonGPU.Totheauthors’knowledge,thisisthefastestapproachforraycastingwhichdoesnotrequireanypreprocessingandcouldberunoncommonGPUs.
出版日期
2018年03月13日（中国期刊网平台首次上网日期，不代表论文的发表时间）
