POLISH ACADEMY of SCIENCES
TECHNICAL SCIENCES
| BULLETIN
of the
POLISH ACADEMY of SCIENCES TECHNICAL SCIENCES |
|
|||
|---|---|---|---|---|
| Volume 52, Issues 3, September 2004 | ||||
| Issue Index | Authors Index | Scope Index | Web Info | |
|
|
||||
| Aims&Scope | Subscription | Authors' guide | Editors |
|
|
pp
215 - 220
|
|---|
|
Extending penetration depth using coded ultrasonography |
| A. NOWICKI, W. SECOMSKI, I. TROTS and J. LITNIEWSKI |
| The issue of maximizing penetration depth with concurrent retaining or enhancement of image resolution constitutes one of the time invariant challenges in ultrasound imaging. Concerns about potential and undesirable side effects set limits on the possibility of overcoming the frequency dependent attenuation effects by increasing peak acoustic amplitudes of the waves probing the tissue. To overcome this limitation a pulse compression technique employing 16 bits Complementary Golay Sequences (CGS) Code was implemented at 4 MHz. In comparison with other, earlier proposed, coded excitation schemes, such as chirp, pseudo-random chirp and Barker codes, the CGS allowed virtually side lobe free operation. Experimental data indicate that the quality — resolution, signal penetration and contrast dynamics — of CGS images is better than the one obtain for standard ultrasonography using short burst excitation. |
| Keywords: |
| ultrasonography, encoding, ultrasound in medicine. |
| Issue Index |
|
Scope Index | Web Info |
|---|---|---|---|
|
|
|||
| Aims&Scope | Subscription | Authors' guide | Editors |
| Copyright
- Bulletin of the Polish Academy of Sciences: Technical Sciences
14 February 2005, site prepared by KZ |
|---|