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  • Title: A semiautomated ultrasound border detection program that facilitates clinical measurement of ultrasound carotid intima-media thickness.
    Author: Stein JH, Korcarz CE, Mays ME, Douglas PS, Palta M, Zhang H, Lecaire T, Paine D, Gustafson D, Fan L.
    Journal: J Am Soc Echocardiogr; 2005 Mar; 18(3):244-51. PubMed ID: 15746714.
    Abstract:
    We have developed a novel, semiautomated carotid intima-media thickness (CIMT) border detection program (AUTO) and evaluated its measurement reproducibility and accuracy. Images from 6 carotid segments were acquired in 50 subjects, for a total of 300 segments. Mean and maximum CIMT values were measured blindly at a reference (REF) lab and in duplicate by experienced (EXP) and novice (NOV) readers using manual (MAN) and AUTO methods. Coefficients of variation for AUTO measurements of mean (3.2%) and maximum (4.1%) CIMT were low, and the AUTO method improved the NOV reader's reproducibility. Compared with the REF lab, mean (0.012 +/- 0.006 mm) and maximum (0.144 +/- 0.006 mm) CIMT biases were small and equivalent to those of the REF lab ( P < .001). The AUTO method shortened reading times by 35% to 46% ( P < .001). We conclude that our novel AUTO CIMT measurement program improved reproducibility and was accurate. Compared with MAN tracing, the AUTO method agreed better with the REF lab and decreased reading time.
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