Calibration of EM Sensors for Spatial Tracking of 3D Ultrasound Probes

Lang, A. R.; Parthasarathy, V.; Jain, Ameet

doi:10.5772/50695

Cited by 2 publications

(2 citation statements)

References 23 publications

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“…The transformation M s ← i , on the other hand, is fixed and it is the goal of the probe calibration to find this. r s M s i M r s i (Khamene and Sauer 2005, Hsu 2007, Lang et al 2012. These phantoms are simple and thus easy to make, but they only provide one datapoint per ultrasound image and must therefore be imaged many times for each calibration.…”

Section: R R S Smentioning

confidence: 99%

Versatile robotic probe calibration for position tracking in ultrasound imaging

et al. 2015

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Within the field of ultrasound-guided procedures, there are a number of methods for ultrasound probe calibration. While these methods are usually developed for a specific probe, they are in principle easily adapted to other probes. In practice, however, the adaptation often proves tedious and this is impractical in a research setting, where new probes are tested regularly. Therefore, we developed a method which can be applied to a large variety of probes without adaptation. The method used a robot arm to move a plastic sphere submerged in water through the ultrasound image plane, providing a slow and precise movement. The sphere was then segmented from the recorded ultrasound images using a MATLAB programme and the calibration matrix was computed based on this segmentation in combination with tracking information. The method was tested on three very different probes demonstrating both great versatility and high accuracy.

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Section: R R S Smentioning

confidence: 99%

Versatile robotic probe calibration for position tracking in ultrasound imaging

et al. 2015

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“…Therefore, a method of more reliable tracking of the probe is a key component for automatic acquisition to be clinically transferable. As an alternative option, EM tracking systems are widely used for medical device tracking and have been reported for tracking the TEE probe [7]. However, registering the EM tracking coordinates to the patient coordinates is required which is difficult to achieve using the EM tracking system on its own and the accuracy of EM tracking could also be influenced by the electromagnetic environment.…”

Section: Introductionmentioning

confidence: 99%

Probe Tracking and Its Application in Automatic Acquisition Using a Trans-Esophageal Ultrasound Robot

Wang

Singh²,

Lau

et al. 2017

Computer-Assisted and Robotic Endoscopy

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Robotic trans-esophageal echocardiography (TEE) has many advantages over the traditional manual control approach during cardiac surgical procedures in terms of stability, remote operation, and radiation safety. To further improve the usability of the robotic approach, development of an intelligent system using automatic acquisition of ultrasound images is proposed. This is addressed using a view planning platform in which the robot is controlled according to a pre-planned path during the acquisition. Considering the real mechanical movement, feedback of the probe position is essential in ensuring the success of the automatic acquisition. In this paper, we present a tracking method using the combination of an electromagnetic (EM) tracking system and image-based registration for the purpose of feedback control used in the automatic acquisition. Phantom experiments were performed to evaluate the accuracy and reliability of the tracking and the automatic acquisition. The results indicate a reliable performance of the tracking method. As for automatic acquisition, the mean positioning error in the near field of ultrasound where most structures of clinical interest are located is 10.44 mm. This phantom study is encouraging for the eventual clinical application of robotic-based automatic TEE acquisition.

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Calibration of EM Sensors for Spatial Tracking of 3D Ultrasound Probes

Cited by 2 publications

References 23 publications

Versatile robotic probe calibration for position tracking in ultrasound imaging

Versatile robotic probe calibration for position tracking in ultrasound imaging

Probe Tracking and Its Application in Automatic Acquisition Using a Trans-Esophageal Ultrasound Robot

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