Impedance-controlled ultrasound probe

Gilbertson, Matthew W.; Anthony, Brian W.

doi:10.1117/12.882169

Cited by 10 publications

(10 citation statements)

References 3 publications

(3 reference statements)

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“…Early results of this work were previously published in [16] and [18]- [21]. Three prototypes of the device have been developed by our group; in this paper, we focus upon the experimental evaluation of Prototype 2.…”

Section: Objectives and Outlinementioning

confidence: 98%

“…Three prototypes of the device have been developed by our group; in this paper, we focus upon the experimental evaluation of Prototype 2. In [18]- [20], we introduce the FCUS probe, describe its mechanical design, and present early results. In [21], we introduce control strategies to enable ergonomic user/device interaction.…”

Section: Objectives and Outlinementioning

confidence: 99%

“…In early tests [18], when operators were first given the FCUS probe operating under pure force control, some had difficulty recognizing when the linear actuator had reached an endpoint. When an endpoint was reached, the actuator needed to be disabled in order to prevent mechanical damage.…”

Section: B Endpoint Avoidance With "Soft Limits"mentioning

confidence: 99%

“…As the subject held the mass, the force-displacement characteristics were quantified with a linear actuator and load cell. The experimental setup utilized the load frame hardware shown in page 796816-7 of [18]. The average stiffness over ten runs was found to be k = 5500 N/m.…”

Section: B Model Parameters-interface Amentioning

confidence: 99%

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Force and Position Control System for Freehand Ultrasound

Gilbertson

Anthony

2015

IEEE Trans. Robot.

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A hand-held force-controlled ultrasound probe has been developed for medical imaging applications. The probepatient contact force can be held constant to improve image stability, swept through a range, or cycled. The mechanical portion of the device consists of a ball screw linear actuator driven by a servo motor, along with a load cell, accelerometer, and limit switches. The performance of the system was assessed in terms of the frequency response to simulated sonographer hand motion and in hand-held image feature tracking during simulated patient motion. The system was found to attenuate contact force variation by 97% at 0.1 Hz, 83% at 1 Hz, and 33% 10 Hz, a range that spans the typical human hand tremor frequency spectrum. In studies with 15 human operators, the device applied the target contact force with ten times less variation than in conventional ultrasound imaging. An ergonomic, human-in-the-loop, imaging-workflow enhancing control scheme, which combines both force-and positioncontrol, permits smooth making and breaking of probe-patient contact, and helps the operator keep the probe centered within its range of motion. By controlling ultrasound probe contact force and consequently the amount of tissue deformation, the system enhances the repeatability, usability, and diagnostic capabilities of ultrasound imaging.

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Section: Objectives and Outlinementioning

confidence: 98%

Section: Objectives and Outlinementioning

confidence: 99%

Section: B Endpoint Avoidance With "Soft Limits"mentioning

confidence: 99%

Section: B Model Parameters-interface Amentioning

confidence: 99%

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Force and Position Control System for Freehand Ultrasound

Gilbertson

Anthony

2015

IEEE Trans. Robot.

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“…We have developed a number of handheld force-controlled systems to enhance commercial ultrasound probes [3][4][5] . The probe-patient contact force can be held constant to stabilize the image, swept through a range of forces, or cycled.…”

Section: Force Control Platformmentioning

confidence: 99%

Enhanced ultrasound for advanced diagnostics, ultrasound tomography for volume limb imaging and prosthetic fitting

Anthony

2016

SPIE Proceedings

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Ultrasound imaging methods hold the potential to deliver low-cost, high-resolution, operator-independent and nonionizing imaging systems -such systems couple appropriate algorithms with imaging devices and techniques. The increasing demands on general practitioners motivate us to develop more usable and productive diagnostic imaging equipment. Ultrasound, specifically freehand ultrasound, is a low cost and safe medical imaging technique. It doesn't expose a patient to ionizing radiation. Its safety and versatility make it very well suited for the increasing demands on general practitioners, or for providing improved medical care in rural regions or the developing world. However it typically suffers from sonographer variability; we will discuss techniques to address user variability.We also discuss our work to combine cylindrical scanning systems with state of the art inversion algorithms to deliver ultrasound systems for imaging and quantifying limbs in 3-D in vivo. Such systems have the potential to track the progression of limb health at a low cost and without radiation exposure, as well as, improve prosthetic socket fitting. Current methods of prosthetic socket fabrication remain subjective and ineffective at creating an interface to the human body that is both comfortable and functional. Though there has been recent success using methods like magnetic resonance imaging and biomechanical modeling, a low-cost, streamlined, and quantitative process for prosthetic cup design and fabrication has not been fully demonstrated. Medical ultrasonography may inform the design process of prosthetic sockets in a more objective manner. This keynote talk presents the results of progress in this area.

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A Novel Ultrasound Elastography Configuration for Simultaneous Measurement of Contact Forces

Diba,

Zara

2023

Sens Imaging

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Impedance-controlled ultrasound probe

Cited by 10 publications

References 3 publications

Force and Position Control System for Freehand Ultrasound

Force and Position Control System for Freehand Ultrasound

Enhanced ultrasound for advanced diagnostics, ultrasound tomography for volume limb imaging and prosthetic fitting

A Novel Ultrasound Elastography Configuration for Simultaneous Measurement of Contact Forces

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