Noise analysis for multi-slice radio frequency current density imaging.

Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference · 2006 · Unclear · Insufficient evidence

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UnclearInsufficient evidencePaper 3474

The paper studies how MRI random noise affects the sensitivity of multi-slice RF-CDI measurements. It derives a current-noise formula and reports that it is verified using both simulation and phantom experiments.

Study snapshot

PublicationConference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference · 2006

Study typeengineering

Reported directionUnclear

Evidence ratingInsufficient

Abstract

Radio frequency current density imaging (RF-CDI) is an imaging technique that measures current density distribution at the Larmor frequency utilizing magnetic resonance imaging (MRI). The multi-slice RF-CDI sequence has extended the ability of RF-CDI to image multiple slices and thus has enhanced its capacity for biomedical applications. In this paper, the influence of MRI random noise on the sensitivity of multi-slice RF-CDI measurement is studied. The formula of current noise is derived, which is verified by both simulation and phantom experiments. A 3-D finite-difference time-domain (FDTD) model is employed to compute the electromagnetic fields in the simulation.

Machine Enhanced Logic

AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typeengineering

Effect directionunclear

PopulationNot supplied

Sample sizeNot supplied

ExposureNot supplied

Evidence strengthInsufficientConfidence: 74% · Peer reviewed: yes

Main findings

Outcomes measured

Influence of MRI random noise on sensitivity of multi-slice RF current density imaging (RF-CDI) measurements
Derived formula for current noise (verification via simulation and phantom experiments)
Electromagnetic field computation using 3-D finite-difference time-domain (FDTD) model

View raw extracted JSON

{
  "study_type": "engineering",
  "exposure": {
    "band": null,
    "source": "MRI (RF-CDI at Larmor frequency)",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "Influence of MRI random noise on sensitivity of multi-slice RF current density imaging (RF-CDI) measurements",
    "Derived formula for current noise (verification via simulation and phantom experiments)",
    "Electromagnetic field computation using 3-D finite-difference time-domain (FDTD) model"
  ],
  "main_findings": "The paper studies how MRI random noise affects the sensitivity of multi-slice RF-CDI measurements. It derives a current-noise formula and reports that it is verified using both simulation and phantom experiments.",
  "effect_direction": "unclear",
  "limitations": [],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "radio frequency current density imaging",
    "RF-CDI",
    "multi-slice",
    "MRI",
    "Larmor frequency",
    "noise analysis",
    "phantom experiment",
    "simulation",
    "finite-difference time-domain",
    "FDTD",
    "electromagnetic fields"
  ],
  "suggested_hubs": []
}

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

Identifiers and source

DOI: 10.1109/iembs.2006.259255
PubMed: 17946077

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