Prototype volumetric ultrasound tomography image guidance system for prone stereotactic partial breast irradiation: Proof-of-concept

Tsuicheng D. Chiu, David Parsons, Yue Zhang, Brian Hrycushko, Bo Zhao, Rajiv Chopra, Nathan Kim, Ann Spangler, Asal Rahimi, Robert Timmerman, Steve B. Jiang, Weiguo Lu, Xuejun Gu

Research output: Contribution to journalArticle

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Accurate dose delivery in stereotactic partial breast irradiation (S-PBI) is challenging because of the target position uncertainty caused by breast deformation, the target volume changes caused by lumpectomy cavity shrinkage, and the target delineation uncertainty on simulation computed tomography (CT) images caused by poor soft tissue contrast. We have developed a volumetric ultrasound tomography (UST) image guidance system for prone position S-PBI. The system is composed of a novel 3D printed rotation water tank, a patient-specific resin breast immobilization cup, and a 1D array ultrasound transducer. Coronal 2D US images were acquired in 5° increments over a 360° range, and planes were acquired every 2 mm in elevation. A super-compounding technique was used to reconstruct the image volume. The image quality of UST was evaluated with a BB-1 breast phantom and BioZorb surgical marker, and the results revealed that UST offered better soft tissue contrast than CT and similar image quality to MR. In the evaluated plane, the size and location of five embedded objects were measured and compared to MR, which is considered as the ground truth. Objects' diameters and the distances between objects in UST differ by approximately 1 to 2 mm from those in MR, which showed that UST offers the image quality required for S-PBI. In future work we will develop a robotic system that will be ultimately implemented in the clinic.

Original languageEnglish (US)
Article number055004
JournalPhysics in Medicine and Biology
Issue number5
StatePublished - Mar 1 2018



  • image-guided radiotherapy
  • stereotactic partial breast irradiation
  • tomography
  • ultrasound

ASJC Scopus subject areas

  • Radiological and Ultrasound Technology
  • Radiology Nuclear Medicine and imaging

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