title: Ultrasonic computed tomography of the breast. Improvement of image quality by use of cross-correlation time-of-flight and phase-insensitive attenuation measurements.
abstract: The authors present two methods of reducing refraction artifacts in ultrasonic computed tomography of the breast. Measuring the time of flight of sonic pulses by cross-correlation instead of leading-edge detection significantly reduces distortion and improves resolution in speed-of-sound images. Phase-insensitive reception of pulse energy across a large aperture array is shown to be superior to a conventional single-element transducer for attenuation imaging.
mesh_terms: D001941:Breast Diseases / Q000175:diagnosis*; D005260:Female; D005374:Filtration / Q000379:methods; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D008961:Models, Structural; D014463:Ultrasonography