An improved freehand 3D-ultrasound volume reconstruction technique for fast scans with scanline motion correction

Harindranath, Aparna; Bharadwaj, Satvika; Shah, Komal; Nadiger, Sanath Kumar; Krishnan, Kasiraman; Arora, Manish

doi:10.1117/12.2582139

Cited by 1 publication

(4 citation statements)

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“…This paper uses an improved scanline-based reconstruction reported in Harindranath et al 31 to ensure correct volume reconstruction for unintended fast probe movements. A coordinate or axis frame is a collection of 3-orthogonal coordinate axes that can be used to refer to any position or orientation change.…”

Section: Methodsmentioning

confidence: 99%

“…Now, each image has a given orientation value which can be used for reconstruction. Since we use a scanline-based approach for reconstruction, as detailed in Harindranath et al, 31 we convert each image to scanlines (like a reverse scan conversion) and interpolate the orientation further so that each scanline has one orientation. The corresponding position values are calculated for each scanline, assuming zero position change in the middle of the image (polar image for the curvilinear probe selected).…”

Section: Methodsmentioning

confidence: 99%

“…Along with ensuring off-axis movement within the selected threshold, the gyroscope-based angular rate for each scan is kept within the maximum probe angular velocity limit shown in equation ( 2). This paper uses an improved scanline-based reconstruction reported in Harindranath et al 31 to ensure correct volume reconstruction for unintended fast probe movements. A coordinate or axis frame is a collection of 3-orthogonal coordinate axes that can be used to refer to any position or orientation change.…”

Section: Scan Quality Assessment Criteria and Reconstructionmentioning

confidence: 99%

“…Each scanline with position and orientation information is filled in to create the volume. A simple nearest neighbor method, the same as in Harindranath et al, 31 is used to fill the volume; that is, multiple values falling onto the same voxel are averaged to get the final value of that voxel.…”

Section: Scan Quality Assessment Criteria and Reconstructionmentioning

confidence: 99%

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IMU-Assisted Manual 3D-Ultrasound Imaging Using Motion-Constrained Swept-Fan Scans

Harindranath,

Shah,

Devadass

et al. 2024

Ultrason Imaging

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Three-dimensional (3D) ultrasonic imaging can enable post-facto plane of interest selection. It can be performed with devices such as wobbler probes, matrix probes, and sensor-based probes. Ultrasound systems that support 3D-imaging are expensive with added hardware complexity compared to 2D-imaging systems. An inertial measurement unit (IMU) can potentially be used for 3D-imaging by using it to track the motion of a one-dimensional array probe and constraining its motion in one degree of freedom (1-DoF) rotation (swept-fan). This work demonstrates the feasibility of an affordable IMU-assisted manual 3D-ultrasound scanner (IAM3US). A consumer-grade IMU-assisted 3D scanner prototype is designed with two support structures for swept-fan. After proper IMU calibration, an appropriate KF-based algorithm estimates the probe orientation during the swept-fan. An improved scanline-based reconstruction method is used for volume reconstruction. The evaluation of the IAM3US system is done by imaging a tennis ball filled with water and the head region of a fetal phantom. From fetal phantom reconstructed volumes, suitable 2D planes are extracted for biparietal diameter (BPD) manual measurements. Later, in-vivo data is collected. The novel contributions of this paper are (1) the application of a recently proposed algorithm for orientation estimation of swept-fan for 3D imaging, chosen based on the noise characteristics of selected consumer grade IMU (2) assessment of the quality of the 1-DoF swept-fan scan with a deflection detector along with monitoring of maximum angular rate during the scan and (3) two probe holder designs to aid the operator in performing the 1-DoF rotational motion and (4) end-to-end 3D-imaging system-integration. Phantom studies and preliminary in-vivo obstetric scans performed on two patients illustrate the usability of the system for diagnosis purposes.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Scan Quality Assessment Criteria and Reconstructionmentioning

confidence: 99%

Section: Scan Quality Assessment Criteria and Reconstructionmentioning

confidence: 99%

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