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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...
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Cardiovascular magnetic resonance imaging, or CMRI, is a non-invasive diagnostic test that employs a magnetic field and radiofrequency waves to create precise images of the heart and arteries. It provides comprehensive information about cardiac anatomy, function, perfusion, and tissue characterization without ionizing radiation.IndicationsCMRI diagnoses various heart conditions, including tissue damage from heart attacks, ischemic heart disease, myocarditis, aortic issues (tears, aneurysms,...
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Introduction: MRI and CT scans are crucial advancements in medical imaging techniques, playing a vital role in diagnosing conditions related to the gastrointestinal (GI) system. Each scan serves distinct purposes, targets specific areas, and requires unique nursing duties.
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Radiological Investigation II: MRI and Ventilation Perfusion Scan01:30

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MRI
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Intraoperative Ultrasound in Spinal Surgery
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Intraoperative Ultrasound in Spinal Surgery

Published on: August 17, 2022

Intraoperative magnetic resonance imaging.

Walter A Hall1, Charles L Truwit

  • 1Department of Neurosurgery, SUNY Upstate Medical University, 750 East Adams Street, Syracuse, NY 13210, USA. hallw@upstate.edu

Acta Neurochirurgica. Supplement
|October 21, 2010
PubMed
Summary
This summary is machine-generated.

Intraoperative MRI (ioMRI) systems help neurosurgeons perform safer surgeries by accommodating brain shift and providing detailed 3D views. Advanced ioMRI features enhance tumor visualization and surgical precision.

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Area of Science:

  • Neurosurgery
  • Medical Imaging
  • Radiology

Background:

  • Neurosurgeons rely on image-guidance for efficient and safe procedures.
  • Conventional neuronavigation (CT/MRI) fails to account for intraoperative brain shift.
  • Intraoperative MRI (ioMRI) systems offer real-time imaging to address brain shift.

Purpose of the Study:

  • To evaluate the advantages of intraoperative MRI (ioMRI) in neurosurgery.
  • To highlight ioMRI's capability in managing brain shift and enhancing surgical outcomes.
  • To discuss the benefits of advanced ioMRI functionalities.

Main Methods:

  • Utilizes intraoperative MRI (ioMRI) systems with varying magnetic field strengths (0.12-3 Tesla).
  • Employs advanced MRI techniques such as MR spectroscopy (MRS), MR angiography (MRA), MR venography (MRV), and diffusion-weighted imaging (DWI).
  • Compares capabilities of different ioMRI field strengths for surgical guidance.

Main Results:

  • ioMRI accommodates for unavoidable brain shift during neurosurgery.
  • Provides superior soft tissue contrast and 3D visualization of the surgical site.
  • Enables visualization of tumors beyond surface view, aiding in safe corridor selection and maximizing resection.
  • High-field ioMRI (>1.5 T) enables advanced techniques like MRS, MRA, MRV, and DWI for enhanced diagnostics and surgical planning.

Conclusions:

  • ioMRI significantly improves neurosurgical safety and efficacy by compensating for brain shift.
  • Advanced ioMRI techniques offer superior diagnostic yield and aid in preventing inadvertent injury to critical structures.
  • The optimal field strength and configuration for ioMRI systems remain areas for further investigation.