Abstract
Perfusion quantification software commonly analyzes compressed video images provided by ultrasound systems. to analysis of raw RF signals, errors in perfusion estimates may be introduced, even when proper is applied to reverse the log-compression. In this , the effects of log-compression, demodulation, scan and 8-bit quantization have been investigated, in of the errors introduced on perfusion parameter estimates. in-vivo contrast bolus sequence was processed using both raw data and linearized video data. The outcome is that log-compressed video sequences can provide estimates accurate as processing RF data under two conditions: a) gain should be such as to prevent both excessive of pixel values to minimum level and saturation to level; b) the dynamic range of log-compression should 45 dB or higher.
Original language | English |
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Article number | 4803409 |
Pages (from-to) | 1690-1693 |
Number of pages | 4 |
Journal | Proceedings - IEEE Ultrasonics Symposium |
DOIs | |
Publication status | Published - Dec 1 2008 |
Event | 2008 IEEE International Ultrasonics Symposium, IUS 2008 - Beijing, China Duration: Nov 2 2008 → Nov 5 2008 |
Keywords
- Contrast agent
- Linearization
- Log compression
- Perfusion
- Quantification
- Radiofrequency
- Video
ASJC Scopus subject areas
- Acoustics and Ultrasonics