Real time rectilinear volumetric imaging

The current Duke real time volumetric scanner uses 40/spl times/40 arrays to scan a pyramidal volume comprised of 64 sector scans 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 close to the transducer could prove more useful for abdominal, breast, or vascular imaging. Therefore, several different sparse array patterns have been investigated for 5 MHz transducers through computer simulation using the Field II software of Jensen. The sparse arrays including a periodic array, a random array and a Mills cross array were compared to a fully sampled array which served as the "gold standard." The Mills cross design showed the best overall performance under the current system constraints. 94/spl times/94 Mills cross arrays including 372 elements have been fabricated. Preliminary real time rectilinear volumetric images of a wire phantom using the Mills Cross were obtained.

[1]  H Lopez,et al.  Frequency independent ultrasound contrast-detail analysis. , 1985, Ultrasound in medicine & biology.

[2]  S.W. Smith,et al.  High-speed ultrasound volumetric imaging system. I. Transducer design and beam steering , 1991, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[3]  G.R. Lockwood,et al.  Broad-bandwidth radiation patterns of sparse two-dimensional vernier arrays , 1997, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[4]  S.W. Smith,et al.  High-density flexible interconnect for two-dimensional ultrasound arrays , 2000, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[5]  Patrick D. Wolf,et al.  Two dimensional arrays for real time volumetric and intracardiac imaging with simultaneous electrocardiogram , 2000, 2000 IEEE Ultrasonics Symposium. Proceedings. An International Symposium (Cat. No.00CH37121).

[6]  A. Fenster,et al.  3-D ultrasound imaging: a review , 1996 .

[7]  S.W. Smith,et al.  Sparse 2-D array design for real time rectilinear volumetric imaging , 2000, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[8]  R. E. Davidsen,et al.  Progress in Two-Dimensional Arrays for Real-Time Volumetric Imaging , 1998, Ultrasonic imaging.

[9]  M Jones,et al.  Validation of real-time three-dimensional echocardiography for quantifying left ventricular volumes in the presence of a left ventricular aneurysm: in vitro and in vivo studies. , 2000, Journal of the American College of Cardiology.

[10]  Pascal Challande,et al.  Development of an Underwater Frontal Imaging Sonar, Concept of 3-D Imaging System , 1991 .

[11]  S.W. Smith,et al.  High-speed ultrasound volumetric imaging system. II. Parallel processing and image display , 1991, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[12]  J. Jensen,et al.  Calculation of pressure fields from arbitrarily shaped, apodized, and excited ultrasound transducers , 1992, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[13]  S.W. Smith,et al.  Update of two dimensional arrays for real time volumetric and real time intracardiac imaging , 1999, 1999 IEEE Ultrasonics Symposium. Proceedings. International Symposium (Cat. No.99CH37027).