Improving resolution of robotic capsule locomotion using dynamic electromagnetic field.

PAPER pubmed Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference 2016 Engineering / measurement Effect: unclear Evidence: Insufficient

Read original paper → DOI: 10.1109/embc.2016.7590679 PMID: 28268316 Evidence Lab

Abstract

This paper describes a new method to control the motion of swallowable wireless capsule endoscopy devices. A dynamic magnetic field produced by a set of external magnetic coils is used to manage the locomotion of the capsule. A permanent magnet is embedded into the capsule in order to manipulate the capsule by changing the external magnetic field strength for each specific position. The dynamic magnetic field is externally controlled to reach and maintain the equilibrium state for holding the capsule in a specific location. This is achieved by keeping the net force of magnetic fields zero. To start the mobility, the magnetic field from one of the external field sources will be reduced for a certain amount of time by sending an OFF-pulse (a current source). The required forces and the pulses are controlled by a specific algorithm to control the step size of the movement in order to achieve precise motion at any chosen velocity. The proposed method is designed to provide a precise motion control with a system extremely low in complexity.

AI evidence extraction

At a glance

Study type

Engineering / measurement

Effect direction

unclear

Population

—

Sample size

—

Exposure

external magnetic coils (dynamic magnetic field) controlling capsule endoscopy device

Evidence strength

Insufficient

Confidence: 74% · Peer-reviewed: yes

Main findings

The paper proposes an externally controlled dynamic magnetic field (via external coils) and an algorithm using OFF-pulses to adjust magnetic forces, aiming to hold the capsule at equilibrium and to control step size for precise locomotion at chosen velocities with low system complexity.

Outcomes measured

Robotic capsule endoscopy locomotion control
Motion resolution/step size control
Ability to hold capsule at a specific location (equilibrium)
Precise motion at chosen velocity

View raw extracted JSON

{
    "study_type": "engineering",
    "exposure": {
        "band": null,
        "source": "external magnetic coils (dynamic magnetic field) controlling capsule endoscopy device",
        "frequency_mhz": null,
        "sar_wkg": null,
        "duration": null
    },
    "population": null,
    "sample_size": null,
    "outcomes": [
        "Robotic capsule endoscopy locomotion control",
        "Motion resolution/step size control",
        "Ability to hold capsule at a specific location (equilibrium)",
        "Precise motion at chosen velocity"
    ],
    "main_findings": "The paper proposes an externally controlled dynamic magnetic field (via external coils) and an algorithm using OFF-pulses to adjust magnetic forces, aiming to hold the capsule at equilibrium and to control step size for precise locomotion at chosen velocities with low system complexity.",
    "effect_direction": "unclear",
    "limitations": [],
    "evidence_strength": "insufficient",
    "confidence": 0.7399999999999999911182158029987476766109466552734375,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "capsule endoscopy",
        "wireless capsule",
        "locomotion",
        "dynamic magnetic field",
        "external magnetic coils",
        "permanent magnet",
        "motion control",
        "equilibrium",
        "OFF-pulse",
        "algorithm"
    ],
    "suggested_hubs": []
}

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AI-extracted fields are generated from the abstract/metadata and may be incomplete or incorrect. This content is for informational purposes only and is not medical advice.

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