[Determination of areas of alternating magnetic field action on a patient's body].

Meditsinskaia tekhnika · 2001 · Unclear · Insufficient evidence

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UnclearInsufficient evidencePaper 3905

Study snapshot

PublicationMeditsinskaia tekhnika · 2001

Study typeengineering

Reported directionUnclear

Evidence ratingInsufficient

Abstract

The pattern of an induction field (B) is of great importance for physiotherapeutical treatment using an alternating magnetic field (AMF). The outline of the B field is determined by the shape of a device generator. Programmes for calculating the B induction field at any space point for the generator as a current ring and a square current loop are given. To know the spatial pattern of the B magnetic field is inadequate to determine the areas of biophysical AMF action. AMF induces a stress field (ES). The latter with regard to the human body and organs gives rise to a drop field of acting potentials (Ua). The latter is a measure of biophysical action at each local point of a patient's body. The Es field depends solely on the shape of the device generator. The Ua field does on this and the form of the human body and organs. Whether the Ua field can be found is discussed. The author proposes to develop programmes for calculating the Ua fields when the generator and human body are usually aligned. It is concluded that the shapes of the generators to act on each specific organ should be standardized.

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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

Populationpatients (human body/organs discussed in modeling context)

Sample sizeNot supplied

ExposureELF

Evidence strengthInsufficientConfidence: 74% · Peer reviewed: yes

Main findings

The paper presents calculation programs for magnetic induction (B) fields for generators modeled as a current ring and a square current loop. It argues that knowing B alone is insufficient to determine areas of biophysical AMF action because AMF induces a stress field (Es) and an acting potential drop field (Ua), which depends on generator shape and body/organ form; it proposes developing programs to calculate Ua fields and concludes generator shapes for targeting specific organs should be standardized.

Outcomes measured

Spatial distribution/pattern of magnetic induction field (B) from AMF generators
Induced stress/electric field (Es) in the body
Resulting acting potential drop field (Ua) as a proposed measure of biophysical action

Limitations

No frequency, field strength, or exposure duration reported in the abstract
Appears to be theoretical/modeling and program description rather than empirical health outcome testing
No sample size or measured clinical/biological endpoints described

View raw extracted JSON

{
  "study_type": "engineering",
  "exposure": {
    "band": "ELF",
    "source": "medical/physiotherapy device (alternating magnetic field generator)",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": "patients (human body/organs discussed in modeling context)",
  "sample_size": null,
  "outcomes": [
    "Spatial distribution/pattern of magnetic induction field (B) from AMF generators",
    "Induced stress/electric field (Es) in the body",
    "Resulting acting potential drop field (Ua) as a proposed measure of biophysical action"
  ],
  "main_findings": "The paper presents calculation programs for magnetic induction (B) fields for generators modeled as a current ring and a square current loop. It argues that knowing B alone is insufficient to determine areas of biophysical AMF action because AMF induces a stress field (Es) and an acting potential drop field (Ua), which depends on generator shape and body/organ form; it proposes developing programs to calculate Ua fields and concludes generator shapes for targeting specific organs should be standardized.",
  "effect_direction": "unclear",
  "limitations": [
    "No frequency, field strength, or exposure duration reported in the abstract",
    "Appears to be theoretical/modeling and program description rather than empirical health outcome testing",
    "No sample size or measured clinical/biological endpoints described"
  ],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "alternating magnetic field",
    "physiotherapy",
    "magnetic induction field",
    "current ring",
    "square current loop",
    "electric (stress) field",
    "acting potentials",
    "dosimetry/modeling",
    "standardization"
  ],
  "suggested_hubs": [
    {
      "slug": "engineering-dosimetry",
      "weight": 0.78,
      "reason": "Focuses on calculating spatial patterns of B, induced fields (Es), and proposed Ua as a measure of action for AMF physiotherapy generators."
    },
    {
      "slug": "medical-therapeutic-emf",
      "weight": 0.64,
      "reason": "Discusses physiotherapeutic treatment using alternating magnetic fields and targeting specific organs."
    }
  ]
}

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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: Not supplied
PubMed: 11837195

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