Real-time rectilinear volumetric imaging using a periodic array.

Published

Journal Article

Current real-time phased array volumetric scanners use a 2-D array to scan a pyramidal volume comprised of many sector scans stacked in the elevation direction. This scan format is primarily useful for cardiac imaging to avoid interference from the ribs. However, a real-time rectilinear volumetric scan with a wider field-of-view (FOV) close to the transducer could prove more useful for abdominal, breast or vascular imaging. In our previous work, a 94 x 94 Mills cross array operating at 5 MHz was fabricated, and the first real-time rectilinear volumetric images were made using a 2-D array and the Duke real-time 3-D scanner. The FOV for the Mills cross was 30 x 8 x 60 mm. Despite reasonable success with the Mills cross array, the array had limitations of poor off-axis sensitivity and a smaller FOV in one direction. To overcome these limitations, a new rectilinear array containing over 65,500 elements was developed with a periodic geometry to increase the FOV to 30 mm x 30 mm x 60 mm and improve the off-axis sensitivity. Images of tissue-mimicking phantoms and the carotid artery in vivo were obtained. In addition, spectral and color flow Doppler results from a pulsatile flow phantom were obtained.

Full Text

Duke Authors

Cited Authors

  • Yen, JT; Smith, SW

Published Date

  • July 2002

Published In

Volume / Issue

  • 28 / 7

Start / End Page

  • 923 - 931

PubMed ID

  • 12208336

Pubmed Central ID

  • 12208336

Electronic International Standard Serial Number (EISSN)

  • 1879-291X

International Standard Serial Number (ISSN)

  • 0301-5629

Digital Object Identifier (DOI)

  • 10.1016/s0301-5629(02)00543-4

Language

  • eng