Feasibility study of robotically tracked photoacoustic computed tomography

Haichong K. Zhang; Fereshteh Aalamifar; Hyun Jae Kang; Emad M. Boctor

doi:10.1117/12.2084600

20 July 2015 Feasibility study of robotically tracked photoacoustic computed tomography

Haichong K. Zhang, Fereshteh Aalamifar, Hyun Jae Kang, Emad M. Boctor

Proceedings Volume 9419, Medical Imaging 2015: Ultrasonic Imaging and Tomography; 941908 (2015) https://doi.org/10.1117/12.2084600
Event: SPIE Medical Imaging, 2015, Orlando, Florida, United States

Abstract

Photoacoustic imaging (PA) is becoming a promising modality for pre-clinical and clinical application by providing functional information with high penetration depth. In particular, PA computed tomography (PACT) aims to visualize the photoacoustic source distribution by scanning ultrasound transducers around a surface of the structure. Placing transducers around the subject or rotating the subject with fixing transducer position are two major approaches to scan in circular arc trajectory, but both are not flexible and have their drawbacks. To resolve the problem, we propose a new scanning method based on the robotic tracking technique. High flexibility of the scanning geometry is available because the trajectory of the tracked transducer generated by robot motion will be regarded as the scanning path. A simulation study of proposed method is conducted, assuming a 6cm array ultrasound transducer was used as receivers. To replicate the scenario that the probe is moved by robot, the probe is placed at two positions across a designated rotation angle, and received signals at both positions are used to generate an image. Compared to the result without robot motion, the lateral resolution of the target drastically improved due to aperture extension. In addition, the effect of error in one of the pose in lateral and axial direction was also simulated. Finally, an experiment was conducted to demonstrate the feasibility of the system. The result indicates that the ultrasound calibration is required to the system, and the robotically tracked PACT has a huge potential to be a new scanning strategy.

Citation Download Citation

Haichong K. Zhang, Fereshteh Aalamifar, Hyun Jae Kang, and Emad M. Boctor "Feasibility study of robotically tracked photoacoustic computed tomography", Proc. SPIE 9419, Medical Imaging 2015: Ultrasonic Imaging and Tomography, 941908 (20 July 2015); https://doi.org/10.1117/12.2084600

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available