Ultrasonic imaging of foreign inclusions and blood vessels through thick skull bones.
We report a new progress in the development of a portable ultrasonic transcranial imaging system, which is expected to significantly improve the clinical utility of transcranial diagnostic ultrasound. When conventional ultrasonic phased array and Doppler techniques are applied through thick skull bones, the ultrasound field is attenuated, deflected, and defocused, leading to image distortion. To address these deficiencies, the ultrasonic transcranial imaging system implements two alternative ultrasonic methods. The first method improves detection of small foreign objects, such as bone fragments, pieces of shrapnel, or bullets, lodged in the brain tissue. Using adaptive beamforming, the method compensates for phase aberration induced by the skull and refocuses the distorted ultrasonic field at the desired location. The second method visualizes the blood flow through intact human skull using ultrasonic speckle reflections from the blood cells, platelets, or contrast agents. By analyzing these random temporal changes, it is possible to obtain 2D or 3D blood flow images, despite the adverse influence of the skull. Both methods were implemented on an advanced open platform phased array controller driving linear and matrix array probes. They were tested on realistic skull bone and head phantoms with foreign inclusions and blood vessel models.
Tessonics Inc., 597 Ouellette Avenue, Windsor, ON, N9A 4J3, Canada.
Kiyanoosh
K
Shapoori
Tessonics Inc., 597 Ouellette Avenue, Windsor, ON, N9A 4J3, Canada.
Jeffrey
J
Sadler
Department of Physics, University of Windsor, 401 Sunset Avenue, Windsor, ON, N9B 3P4, Canada.
Zaki
Z
Ahmed
Department of Physics, University of Windsor, 401 Sunset Avenue, Windsor, ON, N9B 3P4, Canada.
Adrian
A
Wydra
Department of Physics, University of Windsor, 401 Sunset Avenue, Windsor, ON, N9B 3P4, Canada.
Elena
E
Maeva
Tessonics Corporation, 2019 Hazel Street, Birmingham, MI 48009.
Eugene
E
Malyarenko
Tessonics Inc., 597 Ouellette Avenue, Windsor, ON, N9A 4J3, Canada.
Roman
R
Maev
D000465:Algorithms; D001930:Brain Injuries / Q000000981:diagnostic imaging*; D004453:Echoencephalography / Q000379:methods*; D005547:Foreign Bodies / Q000000981:diagnostic imaging*; D006801:Humans; D021621:Imaging, Three-Dimensional; D008962:Models, Theoretical; D019047:Phantoms, Imaging; D015203:Reproducibility of Results; D012886:Skull / Q000000981:diagnostic imaging*