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Related Concept Videos

Magnetic Resonance Imaging01:24

Magnetic Resonance Imaging

Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
Imaging Studies IV: Magnetic Resonance Imaging01:27

Imaging Studies IV: Magnetic Resonance Imaging

Introduction:Magnetic Resonance Imaging, or MRI, can include a specialized imaging technique of the urinary system known as Magnetic Resonance Urography (MRU). This radiation-free technique uses strong magnetic fields and radio waves to produce detailed images with the help of a computer. MRU is particularly effective for visualizing fluid-filled structures like the kidneys, ureters, and bladder.Applications of MRI in the Genitourinary SystemKidneys and Ureters: MRI detects tumors, cysts,...

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Use of Magnetic Resonance Imaging and Biopsy Data to Guide Sampling Procedures for Prostate Cancer Biobanking
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Biopsy needle localization using magnetic induction imaging principles: a feasibility study.

B Yusupov1, S Zlochiver

  • 1Department of Biomedical Engineering, Tel-AvivUniversity, Tel-Aviv, Israel. bennyyusupov@yahoo.com

IEEE Transactions on Bio-Medical Engineering
|June 14, 2012
PubMed
Summary
This summary is machine-generated.

Magnetic induction (MI) imaging offers a novel, low-cost method for precisely locating biopsy needles during image-guided procedures. This noninvasive technique shows potential as an alternative to current imaging modalities for cancer biopsies.

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Area of Science:

  • Biomedical Engineering
  • Medical Imaging
  • Electromagnetism

Background:

  • Accurate biopsy needle navigation is crucial for diagnosing cancerous lesions.
  • Existing imaging modalities can be costly or invasive.
  • Magnetic induction (MI) imaging is an emerging noninvasive technique for measuring electrical conductivity in tissues.

Purpose of the Study:

  • To investigate the feasibility of using magnetic induction (MI) principles for imaging and locating biopsy needles within biological tissues.
  • To evaluate MI imaging as a potential alternative for image-guided biopsies.

Main Methods:

  • Simulations and experimental studies were conducted using a custom-designed contactless excitation/sensing unit.
  • A raster scan approach was employed on a tissue phantom with an inserted biopsy needle.
  • Secondary-induced electromotive force (emf(s)) was measured using a 30-mA, 50-kHz excitation field.

Main Results:

  • Simulations highlighted the benefit of a ferrimagnetic core in the excitation coil for enhancing induced currents and scanning resolution.
  • Experimental results accurately depicted needle position and orientation with 0.1 mm accuracy and a ~30 dB signal-to-background ratio.
  • A high correlation (R² = 0.89) was observed between simulation and experimental data.

Conclusions:

  • Magnetic induction (MI) imaging demonstrates significant potential for accurate, noninvasive biopsy needle localization.
  • This technique could offer a cost-effective alternative to current imaging methods in image-guided biopsy procedures.
  • Further development may enhance MI imaging's role in clinical diagnostics.