Ultrasonic imaging system using spatial and temporal M-sequences
Abstract
A new ultrasonic imaging system combining temporal modulation of the ultrasonic signal by an M-sequence with spatial modulation of the wave field by a rotating M-sequence phase disk has been developed. This system uses neither beam forming nor transducer scanning, and has high resolution both in range and azimuth. The correlation function of the temporal M-sequence determines the range resolution, while the azimuth resolution is determined by the configuration of the rotating M-sequence phase disk. The use of the M-sequence modulations also results in images with high signal-to-noise ratio.
- Publication:
-
Ultrasonic Imaging
- Pub Date:
- July 1979
- Bibcode:
- 1979UltIm...1..245S
- Keywords:
-
- Acoustical Holography;
- Computer Techniques;
- Image Reconstruction;
- Signal Processing;
- Ultrasonics;
- Autocorrelation;
- Computer Programs;
- Noise Reduction;
- Rotating Disks;
- Signal To Noise Ratios;
- Instrumentation and Photography