DMCA
Active Double-Contour for Segmentation of Vessels in Digital Subtraction Angiography (2001)
| Citations: | 5 - 0 self |
BibTeX
@MISC{Hinz01activedouble-contour,
author = {Manfred Hinz and Klaus D. Toennies and Markus Grohmann and Regina Pohle},
title = {Active Double-Contour for Segmentation of Vessels in Digital Subtraction Angiography},
year = {2001}
}
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Abstract
Successful#extraction#of#small#vessels#in#DSA#images#requires#inclusion#of#prior#knowledge#about#vessel#characteristics.#We developed#an#active#double#contour#(ADC)#that#uses#a#vessel#template#as#a#model.#The#template#is#fitted#to#the#vessel#using an# adapted# ziplock# snake# approach# based# on# two# user-specified# end# locations.# The# external# energy# terms# of# the# ADC describe# an# ideal# vessel# with# projections# changing# slowly# their# course,# width# and# intensity.# A# backtracking# ability# was added#that#enables#overturning#local#decisions#that#may#cause#the#ziplock#snake#to#be# trapped#in#a#local#minimum.#This#is because#the#optimisation#of#the#ADC#is#carried#out#locally.#If#the#total#energy#indicates#such#case,#vessel#boundary#points#are removed#and#the#ziplock# process# starts# again# without# this# location# in# its# actual# configuration.# The#method#was#tested#on artificial#data# and#DSA#data.#The#former#showed#good#agreement#between#artificial#vessel#and#segmented# structure# at# an SNR#as#low#as#1.5:1.#Results# from#DSA#data#showed# robustness#of#the#method#in#the#presence#of#noise#and# its#ability# to cope# with# branchings# and# crossings.# The# backtracking# was# found# to# overcome# local# minima# of# the# energy# function# at artefacts,#vessel#crossings#and#in#regions#of#low#SNR.
Keyphrases
active double-contour digital subtraction angiography dsa data local minimum ideal vessel local decision good agreement adapted ziplock external energy term actual configuration vessel crossing artificial vessel total energy indicates case vessel template boundary point successful extraction energy function ziplock snake dsa image prior knowledge ziplock process user-specified end location active double contour small vessel low snr vessel characteristic artificial data backtracking ability segmented structure
