A single element 3D ultrasound tomography system

Zhang, Xiang; Fincke, Jonathan R.; Kuzmin, Andrey; Lempitsky, Victor; Anthony, Brian W.

doi:10.1109/embc.2015.7319647

Cited by 10 publications

(11 citation statements)

References 8 publications

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“…5 The presented flexible single element system will support future development and validation of new algorithms. 4 Future work on the system will include: B-mode/UST imaging of additional phantom and in-vivo targets, volumetric reconstruction of scanned geometries, robust segmentation of layers and volumes, and integration of ultrasound imaging into the prosthetic design work-flow. Results and insights gained from the projected work will inform and guide future clinical system designs.…”

Section: Discussionmentioning

confidence: 99%

“…We have expanded upon the data set collected previously on the system and demonstrated that the capability of collecting in-vivo data. 4 Leveraging the flexibility of the designed system, multiple frequency transducers have been tested on three separate subjects with a total of five image targets. Comparisons of B-mode versus MRI scans of each target are presented and show congruence between the two imaging modalities for the each limb.…”

Section: Discussionmentioning

confidence: 99%

“…4 In cylindrical scanning, each received echo is actually a summation of all echoing objects at the same radii from the transducer. This creates a sinusoidal diffraction pattern for each point source within the ROI.…”

Section: Image Reconstructionmentioning

confidence: 99%

“…3 and built a single element tomographic system to leverage the ultrasound tomography (UST) technique for limb imaging. 4 To apply UST imaging for limbs, new algorithms and hardware accommodating complex scattering and attenuation of ultrasound in bone need to be explored. The developed single element system enables the necessary flexibility to test varying algorithms, sampling strategies, and transducers.…”

Section: Introductionmentioning

confidence: 99%

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Single element ultrasonic imaging of limb geometry: an in-vivo study with comparison to MRI

2016

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Despite advancements in medical imaging, current prosthetic fitting methods remain subjective, operator dependent, and non-repeatable. The standard plaster casting method relies on prosthetist experience and tactile feel of the limb to design the prosthetic socket. Often times, many fitting iterations are required to achieve an acceptable fit. Use of improper socket fittings can lead to painful pathologies including neuromas, inflammation, soft tissue calcification, and pressure sores, often forcing the wearer to into a wheelchair and reducing mobility and quality of life. Computer software along with MRI/CT imaging has already been explored to aid the socket design process. In this paper, we explore the use of ultrasound instead of MRI/CT to accurately obtain the underlying limb geometry to assist the prosthetic socket design process. Using a single element ultrasound system, multiple subjects' proximal limbs were imaged using 1, 2.25, and 5 MHz single element transducers. Each ultrasound transducer was calibrated to ensure acoustic exposure within the limits defined by the FDA. To validate image quality, each patient was also imaged in an MRI. Fiducial markers visible in both MRI and ultrasound were used to compare the same limb cross-sectional image for each patient. After applying a migration algorithm, B-mode ultrasound cross-sections showed sufficiently high image resolution to characterize the skin and bone boundaries along with the underlying tissue structures.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Image Reconstructionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Single element ultrasonic imaging of limb geometry: an in-vivo study with comparison to MRI

2016

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“…Likewise, breast ultrasound relies heavily on the doctor's interpretation and is often used as a supplementary tool [13,14]. In general, biopsy is the gold standard for the diagnosis of breast cancer, which show that there are a lot of false-positive cases diagnosed by ultrasound imaging [15][16][17][18]. Ultrasound computer tomography (USCT) is a potential candidate for the imaging of breast cancer [19,20].…”

Section: Introductionmentioning

confidence: 99%

Multi-Perspective Ultrasound Imaging Technology of the Breast with Cylindrical Motion of Linear Arrays

et al. 2019

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In this paper, we propose a multi-perspective ultrasound imaging technology with the cylindrical motion of four piezoelectric micromachined ultrasonic transducer (PMUT) rotatable linear arrays. The transducer is configured in a cross shape vertically on the circle with the length of the arrays parallel to the z axis, roughly perpendicular to the chest wall. The transducers surrounded the breast, which achieves non-invasive detection. The electric rotary table drives the PMUT to perform cylindrical scanning. A breast model with a 2 cm mass in the center and six 1-cm superficial masses were used for the experimental analysis. The detection was carried out in a water tank and the working temperature was constant at 32 °C. The breast volume data were acquired by rotating the probe 90° with a 2° interval, which were 256 × 180 A-scan lines. The optimized segmented dynamic focusing technology was used to improve the image quality and data reconstruction was performed. A total of 256 A-scan lines at a constant angle were recombined and 180 A-scan lines were recombined according to the nth element as a dataset, respectively. Combined with ultrasound imaging algorithms, multi-perspective ultrasound imaging was realized including vertical slices, horizontal slices and 3D imaging. The seven masses were detected and the absolute error of the size was approximately 1 mm where even the image of the injection pinhole could be seen. Furthermore, the breast boundary could be seen clearly from the chest wall to the nipple, so the location of the masses was easier to confirm. Therefore, the validity and feasibility of the data reconstruction method and imaging algorithm were verified. It will be beneficial for doctors to be able to comprehensively observe the pathological tissue.

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Three-Dimensional Surface Point Cloud Ultrasound for Better Understanding and Transmission of Ultrasound Scan Information

Stember

2018

J Digit Imaging

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Ultrasound is notoriously plagued by high user dependence. There is a steep drop-off in information in going from what the sonographer sees during image acquisition and what the interpreting radiologist is able to view at the reading station. One countermeasure is probe localization and tracking. Current implementations are too difficult and expensive to use and/or do not provide adequate detail and perspective. The aim of this work was to demonstrate that a protocol combining surface three-dimensional photographic imaging with traditional ultrasound images may be a solution to the problem of probe localization, this approach being termed surface point cloud ultrasound (SPC-US). Ultrasound images were obtained of major vessels in an ultrasound training phantom, while simultaneously obtaining surface point cloud (SPC) 3D photographic images, with additional scanning performed on the right forearm soft tissues, kidneys, chest, and pelvis. The resulting sets of grayscale/color Doppler ultrasound and SPC images are juxtaposed and displayed for interpretation in a manner analogous to current text-based annotation or computer-generated stick figure probe position illustrations. Clearly demonstrated is that SPC-US better communicates information of probe position and orientation. Overall, it is shown that SPC-US provides much richer image representations of probe position on the patients than the current prevailing schemes. SPC-US turns out to be a rather general technique with many anticipated future applications, though only a few sample applications are illustrated in the present work.

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A single element 3D ultrasound tomography system

Cited by 10 publications

References 8 publications

Single element ultrasonic imaging of limb geometry: an in-vivo study with comparison to MRI

Single element ultrasonic imaging of limb geometry: an in-vivo study with comparison to MRI

Multi-Perspective Ultrasound Imaging Technology of the Breast with Cylindrical Motion of Linear Arrays

Three-Dimensional Surface Point Cloud Ultrasound for Better Understanding and Transmission of Ultrasound Scan Information

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