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Related Concept Videos

Magnetic Resonance Imaging01:24

Magnetic Resonance Imaging

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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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Temperature Measurement Sites01:14

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A thermometer measures body temperature. The common sites for measuring body temperature are the oral cavity, axillary region, temporal artery, and skin surface, such as the forehead, abdomen, and axilla. True core body temperature is assessed in the rectum, tympanic membrane, pulmonary artery, esophagus, and urinary bladder.
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...
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NMR Spectrometers: Resolution and Error Correction01:14

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When magnetic nuclei in a sample achieve resonance and undergo relaxation, the signal detected in NMR is an approximately exponential free induction decay. Fourier transform of an exponential decay yields a Lorentzian peak in the frequency domain. Lorentzian peaks in an NMR spectrum are defined by their amplitude, full width at half maximum, and position, where the peak width is governed by the spin-spin relaxation time alone. In real experiments, however, the applied magnetic field is rendered...
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Assessing Body Temperature - Tympanic membrane01:14

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Assessing tympanic membrane temperature involves using a tympanic membrane thermometer (TMT). Here is a step-by-step guide:
Step 1: Begin by practicing good hand hygiene to prevent the transmission of microorganisms.
Step 2: Turn on the thermometer and wait until the ready sign appears on the screen to ensure accurate measurement.
Step 3: Slide the probe cover in place to prevent cross-contamination.
Step 4: Instruct the patient to tilt their head to the side for comfort and check for cerumen...
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Near-Infrared Temperature Measurement Technique for Water Surrounding an Induction-heated Small Magnetic Sphere
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Magnetic resonance thermometry: Methodology, pitfalls and practical solutions.

Lukas Winter1, Eva Oberacker1, Katharina Paul1

  • 1a Berlin Ultra-high Field Facility (BUFF), Max-Delbrück Centre for Molecular Medicine , Berlin , Germany .

International Journal of Hyperthermia : the Official Journal of European Society for Hyperthermic Oncology, North American Hyperthermia Group
|December 29, 2015
PubMed
Summary

Accurate thermal dose monitoring is crucial for effective thermal therapies. Magnetic resonance (MR) thermometry offers non-invasive temperature mapping, advancing treatment evaluation and understanding of thermal effects.

Keywords:
Magnetic resonance imagingablationfocused ultrasoundhyperthermiathermal MRthermal therapiesthermometry

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Area of Science:

  • Medical Physics
  • Oncology
  • Biomedical Engineering

Background:

  • Thermal therapies, including thermoablative approaches and hyperthermia, require precise thermal dose information for efficacy.
  • Intratumoural temperature monitoring is linked to clinical outcomes in thermal treatments.
  • Invasive temperature measurements can cause complications, highlighting the need for non-invasive methods.

Purpose of the Study:

  • To review advancements in Magnetic Resonance (MR) thermometry for non-invasive temperature monitoring in thermal therapies.
  • To discuss the evolution from relative to quantitative temperature mapping in MR thermometry.
  • To explore practical considerations, challenges, and future directions in MR thermometry for clinical applications.

Main Methods:

  • Review of established and emerging MR thermometry techniques developed over the past two decades.
  • Analysis of progress in accuracy, robustness, and quantitative temperature measurement capabilities.
  • Survey of current thermal therapy hardware and its potential integration with MR thermometry.

Main Results:

  • MR thermometry has significantly improved in accuracy and robustness for in vivo applications.
  • A shift towards quantitative temperature readings is evident in current and future MR thermometry research.
  • Progress in MR thermometry is essential for benchmarking thermal therapy efficiency and understanding thermal effects.

Conclusions:

  • MR thermometry is a key non-invasive technique for evaluating and adapting thermal therapies.
  • Continued development towards quantitative MR thermometry is vital for advancing therapeutic applications and understanding thermal biology.
  • Addressing technical obstacles is crucial for enhancing spatial and temporal resolution in vivo.