Ian Suchet and Wing Tam, The Ultrasound of Life: An Interactive Fetal Ultrasound Teaching Program (Fifth Edition), Suchet Technologies, Saskatchewan, Canada (2006) DVD.
- 作者：Lourens Pistorius
- 关键词：Ultrasound ; Ultrasonic imaging ; Acoustic radiation force ; Abdominal imaging ; Elastography ; Physiological motion
- 刊名：Ultrasound in Medicine and Biology
- 出版年：2007
- 期刊代码：82_03015629
- 类别：ph
- 出版时间：July 2007
- 卷：33
- 期：7
- 页码：1167
- 文件大小：38 K
摘要
The effect of physiological motion on the quality of radiation force elasticity images has been investigated. Experimental studies and simulated images were used to investigate the impact of motion effects on image quality metrics over a range of clinically realistic velocity and acceleration magnitudes. Evaluation criteria included motion filter effectiveness, image signal-to-noise ratio (SNR) and the contrast-to-noise ratio (CNR) of a stiff inclusion embedded in a homogeneous background material. Two transmit frequencies (2.5 and 4.4 MHz) were analyzed and contrasted in terms of image quality over a range of target motions. Results indicate that situations may exist where liver and cardiac motion magnitudes lead to poor image quality, but optimized transducer orientations may help suppress motion artifacts if some a priori information concerning target motion characteristics is known. In the presence of significant target motion, utilizing a lower transmit frequency can improve SNR and CNR in elasticity images. (E-mail: brian.fahey@duke.edu).