Image distortion in thermoacoustic tomography caused by microwave diffraction.
We report an intrinsic image distortion in microwave-induced thermoacoustic tomography. The distortion, due to microwave diffraction in the object to be imaged, leads to nonuniform excitation of acoustic pressure during microwave illumination. Both numerical simulations and phantom experiments demonstrate this phenomenon. A method of partial correction is also provided.
Biomedical Engineering Department, Washington University in St. Louis, St. Louis, Missouri 63130, USA. CLI@biomed.wustl.edu
Changhui
C
Li
Manojit
M
Pramanik
Geng
G
Ku
Lihong V
LV
Wang
D000162:Acoustics; D000465:Algorithms; D001703:Biophysics / Q000379:methods*; D004563:Electrochemistry / Q000379:methods; D007089:Image Enhancement; D007091:Image Processing, Computer-Assisted; D008872:Microwaves; D015233:Models, Statistical; D008962:Models, Theoretical; D019047:Phantoms, Imaging; D012542:Scattering, Radiation; D013817:Thermography; D013997:Time Factors; D014054:Tomography / Q000379:methods*