Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
3D spatial compounding of ultrasound images using image-based nonrigid registration
Autore:
Krucker, JF; Meyer, CR; LeCarpentier, GL; Fowlkes, JB; Carson, PL;
Indirizzi:
Univ Michigan, Dept Radiol, Ann Arbor, MI 48109 USA Univ Michigan Ann Arbor MI USA 48109 Dept Radiol, Ann Arbor, MI 48109 USA
Titolo Testata:
ULTRASOUND IN MEDICINE AND BIOLOGY
fascicolo: 9, volume: 26, anno: 2000,
pagine: 1475 - 1488
SICI:
0301-5629(200011)26:9<1475:3SCOUI>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
MUTUAL INFORMATION; SPECKLE; SCANS; RECONSTRUCTION; MAXIMIZATION; REFRACTION;
Keywords:
ultrasound imaging; ultrasonics; medical imaging; 3D ultrasound; 3D spatial compounding; automatic registration; mutual information; thin plate spline; refraction correction;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
31
Recensione:
Indirizzi per estratti:
Indirizzo: Krucker, JF Univ Michigan, Dept Radiol, 200 Zina Pitcher Pl,Kresge III,Rm 3315, Ann Arbor, MI 48109 USA Univ Michigan 200 Zina Pitcher Pl,Kresge III,Rm 3315 Ann Arbor MI USA 48109
Citazione:
J.F. Krucker et al., "3D spatial compounding of ultrasound images using image-based nonrigid registration", ULTRASOUN M, 26(9), 2000, pp. 1475-1488

Abstract

Medical ultrasound images are often distorted enough to significantly limit resolution during compounding (i.e., summation of images from multiple views). A new, volumetric image registration technique has been used successfully to enable high spatial resolution in three-dimensional (3D) spatial compounding of ultrasound images. Volumetric ultrasound data were acquired byscanning a linear matrix array probe in the elevational direction in a focal lesion phantom and in a breast in vitro. To obtain partly uncorrelated views, the volume of interest was scanned at five different transducer tilt angles separated by 4 degrees to 6 degrees. Pairs of separate views were registered by an automatic procedure based on a mutual information metric, using global full affine and thin-plate spline warping transformations. Registration accuracy was analyzed automatically in the phantom data, and manually in vivo, yielding average registration errors of 0.31 mm and 0.65 mm, respectively. In the vicinity of the warping control points, registrations obtained with warping transformations were significantly more accurate than full affine registrations. Compounded images displayed the expected reduction in speckle noise and increase in contrast-to-noise ratio (CNR), as well as better delineation of connective tissues and reduced shadowing. Compounding also revealed some apparent low contrast lobulations that were not visible in the single-sweep images. Given expected algorithmic and hardware enhancements, nonrigid, image-based registration shows great promise for reducing tissue motion and refraction artifacts in 3D spatial compounding. (C) 2001 World Federation for Ultrasound in Medicine & Biology.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/04/20 alle ore 02:49:20