Acoustic radiation force impulse (ARFI) imaging uses high-energy, focused acoustic pulses and conventional diagnostic sonography methods to measure tissue elasticity. Using a modified sonography transducer, a series of high-intensity pushing beams and low PRF tracking beams is transmitted, measuring the magnitude of tissue displacement in response to the applied force. The response to this force can determine the tissue's state of health. Currently, magnetic resonance imaging, computed tomography, and B-mode sonography are considered gold standards for soft tissue imaging. This article presents how ARFI compares to B-mode sonography and reviews the current literature.
Fahey BJ, Hsu SJ, Wolf PD, Nelson RC, Trahey GE: Liver ablation guidance with acoustic radiation force impulse imaging: challenges and opportunities. Phys Med Biol2006;51:3785-3808.
2.
Fahey BJ, Nightingale KR, Nelson RC, Palmeri ML, Trahey GE: Acoustic radiation force impulse imaging of the abdomen: demonstration of feasibility and utility. Ultrasound Med Biol2005;31:1185-1198.
3.
Hsu SJ, Wolf PD, Fahey BJ, Pinton GF, Dumont DM, Trahey GE: In vivo acoustic radiation force impulse imaging of cardiac ablations . 2005 IEEE Ultrasonics Symposium2005 ;2:1117-1121.
4.
Nightingale K. , Fahey B., Hsu S., et al: On the potential for guidance of ablation therapy using acoustic radiation force impulse imaging . Presented at: 4th International Symposium on Biomedical Imaging: From Nano to Macro; April 12-15, 2007; Arlington, VA .
5.
Nightingale K., Palmeri M., Bouchard R., Trahey G.: Acoustic radiation force impulse imaging: a parametric analysis of factors affecting image quality . 2003IEEE Ultrasonics Symposium2003;1:548-553.
6.
Nightingale K. , Soo MS, Palmeri M., Congdon A., Frinkley K., Trahey G.: Imaging tissue mechanical properties using impulsive acoustic radiation force. Presented at: IEEE International Symposium on Biomedical Imaging: Nano to Macro; April 15-18, 2004; Arlington, VA.
7.
Palmeri M., Frinkley K., Zhai L., et al: Acoustic radiation force impulse (ARFI) imaging of the gastrointestinal tract. 2004IEEE Ultrasonics Symposium2004;1:744-747.
8.
Palmeri ML, Nightingal KR: On the thermal effects associated with radiation force imaging of soft tissue . IEEE Trans Ultrason Ferroelectr Freq Control 2004;51: 551-565.
9.
Sharma AC, Soo MS, Trahey GE, Nightingale KR: Acoustic radiation force impulse imaging of in vivo breast masses . 2004IEEE Ultrasonics Symposium2004; 1:728-731.
10.
Trahey GE, Dahl, JJ, McAleavey SA, Gallippi CM, Nightingale KR: Arterial stiffness measurements with acoustic radiation force impulse imaging . Ultrason Imaging Signal Process2003;5035:235-241.
