Search results for: Fereshteh Aalamifar
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Currently available ultrasound (US) tomography systems suggest utilizing cylindrical transducers that can be used for a specific organ. In this paper, our focus is on an alternative way of creating US tomographic images that could be used for other anatomies and more general applications. This system consists of two conventional US probes facing each other while one or several of the transducers in...
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Doppler ultrasound is a non-invasive diagnostic tool for the quantitative measurement of blood flow. However, given that it provides velocity data that is dependent on the location and angle of measurement, repeat measurements to detect problems over time may require an expert to return to the same location. We therefore developed an image-guidance system based on ultrasound B-mode images that enables...
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Multimedia Tools and Applications > 2016 > 75 > 22 > 14247- 14261
Deep Venous Thrombosis (DVT) is a major cause of morbidity and mortality. Manually scanning with Ultrasound (US) probe brings heavy work load for the sonographers. This paper proposes a novel “Mirror robotic US scanning system. The system is composed of two-arm robot, linear US probes for master and slave side, Kinect sensor as a vision servo. On the master side, sonographers hold one robot arm and...
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International Journal of Computer Assisted Radiology and Surgery > 2016 > 11 > 10 > 1821-1829
Purpose Ultrasound (US) calibration is the process of determining the unknown transformation from a coordinate frame such as the robot’s tooltip to the US image frame and is a necessary task for any robotic or tracked US system. US calibration requires submillimeter-range accuracy for most applications, but it is a time-consuming and repetitive task. We provide a new framework for automatic...
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This study presents one of the enabling technologies for teleoperated bevel-tip needle steering under real-time MRI guidance i.e. capability of tracking the needle with higher accuracy and bandwidth than real-time MRI. Three fibers, each with three Fiber Bragg Gratings (FBG) were embedded into a 0.6 mm inner stylet of a 20G MRI-compatible biopsy needle. The axial force caused by the bevel-tip was...
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The problem of finding finite state models of systems with quantized inputs and outputs has received much deserved attention. In particular, a notion of ρ/μ approximation was proposed and shown to be relevant to the problem of control synthesis. In this paper, we revisit a recently developed constructive algorithm for generating ρ/μ approximations for a class of systems, and we propose and analyze...
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Recently, cognitive wireless sensor networks (CWSN) have been proposed to enhance the overall functionality of WSNs based on application needs. Cognition refers to the process of making decisions and acting based on the network conditions in order to achieve end-to-end goals of the network. In the previously proposed architecture, a new node — Cognitive Node (CN)-, which is responsible for managing...
