Feasibility study of robotically tracked photoacoustic computed tomography

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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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.

Original languageEnglish (US)
Title of host publicationMedical Imaging 2015: Ultrasonic Imaging and Tomography
PublisherSPIE
Volume9419
ISBN (Print)9781628415094
DOIs
StatePublished - 2015
EventMedical Imaging 2015: Ultrasonic Imaging and Tomography - Orlando, United States
Duration: Feb 22 2015Feb 23 2015

Other

OtherMedical Imaging 2015: Ultrasonic Imaging and Tomography
CountryUnited States
CityOrlando
Period2/22/152/23/15

Fingerprint

Photoacoustic effect
Feasibility Studies
Transducers
Tomography
transducers
tomography
Scanning
robot dynamics
scanning
Ultrasonics
Robots
Trajectories
trajectories
Imaging techniques
probes
Robotics
robotics
robots
fixing
Calibration

Keywords

  • computed tomography
  • photoacoustic imaging
  • robotic tracking

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Radiology Nuclear Medicine and imaging

Cite this

Zhang, H. K., Aalamifar, F., Kang, H. J., & Boctor, E. (2015). Feasibility study of robotically tracked photoacoustic computed tomography. In Medical Imaging 2015: Ultrasonic Imaging and Tomography (Vol. 9419). [941908] SPIE. https://doi.org/10.1117/12.2084600

Feasibility study of robotically tracked photoacoustic computed tomography. / Zhang, Haichong K.; Aalamifar, Fereshteh; Kang, Hyun Jae; Boctor, Emad.

Medical Imaging 2015: Ultrasonic Imaging and Tomography. Vol. 9419 SPIE, 2015. 941908.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Zhang, HK, Aalamifar, F, Kang, HJ & Boctor, E 2015, Feasibility study of robotically tracked photoacoustic computed tomography. in Medical Imaging 2015: Ultrasonic Imaging and Tomography. vol. 9419, 941908, SPIE, Medical Imaging 2015: Ultrasonic Imaging and Tomography, Orlando, United States, 2/22/15. https://doi.org/10.1117/12.2084600
Zhang HK, Aalamifar F, Kang HJ, Boctor E. Feasibility study of robotically tracked photoacoustic computed tomography. In Medical Imaging 2015: Ultrasonic Imaging and Tomography. Vol. 9419. SPIE. 2015. 941908 https://doi.org/10.1117/12.2084600
Zhang, Haichong K. ; Aalamifar, Fereshteh ; Kang, Hyun Jae ; Boctor, Emad. / Feasibility study of robotically tracked photoacoustic computed tomography. Medical Imaging 2015: Ultrasonic Imaging and Tomography. Vol. 9419 SPIE, 2015.
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