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Magnetic Resonance Imaging

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...

Radiological Investigation II: MRI and Ventilation Perfusion Scan

Radiological Investigation II: MRI and Ventilation Perfusion Scan

Description
Magnetic Resonance Imaging (MRI) and Ventilation Perfusion Scans are two radiological investigations that offer detailed diagnostic images of the body, particularly lung structures.
MRI
MRI uses magnetic fields and radiofrequency signals to distinguish between normal and abnormal tissues. This technology provides a more detailed diagnostic image than CT scans, enabling it to characterize pulmonary nodules, stage bronchogenic carcinoma, and evaluate inflammatory activity in...

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Quantitative Mapping of Specific Ventilation in the Human Lung using Proton Magnetic Resonance Imaging and Oxygen as a Contrast Agent

Quantitative Mapping of Specific Ventilation in the Human Lung using Proton Magnetic Resonance Imaging and Oxygen as a Contrast Agent

Published on: June 5, 2019

Single-breath-hold multiple-slice DENSE MRI.

Andreas Sigfridsson¹, Henrik Haraldsson, Tino Ebbers

¹Department of Radiology, Mie University, Tsu, Mie, Japan. andreas.sigfridsson@liu.se

Magnetic Resonance in Medicine

|May 1, 2010

Summary

This summary is machine-generated.

This study introduces a new method for cardiac magnetic resonance imaging, enabling multiple slice acquisition in one breath hold. This technique improves efficiency and patient comfort compared to traditional methods without sacrificing image quality.

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Area of Science:

Cardiovascular Imaging
Magnetic Resonance Imaging
Biomedical Engineering

Background:

Conventional DENSE (Displacement Encoding with Stimulated Echo) MRI requires multiple breath holds for acquiring multiple slices.
Multiple breath holds can lead to inconsistencies in heart rate and position, potentially affecting image quality and patient comfort.

Purpose of the Study:

To develop and validate a novel method for acquiring multiple displacement-encoded slices within a single breath hold.
To improve the efficiency of DENSE MRI while maintaining diagnostic image quality.

Main Methods:

A new DENSE MRI technique was developed to acquire multiple slices in a single cardiac cycle.
The method utilizes the position-encoded stimulated echo available in the whole heart.
Strain values from the proposed method were compared to those from conventional single-slice DENSE acquisitions.

Main Results:

The proposed method demonstrated good agreement with conventional DENSE, with a Lagrangian E(2) strain bias of 0.000 and 95% limits of agreement of +/- 0.04.
The root-mean-square difference was 0.02 (9.4% of mean end-systolic E(2)), indicating comparable accuracy.
The technique successfully acquired multiple slices in a single breath hold, improving efficiency.

Conclusions:

The proposed single-breath-hold multi-slice DENSE method is a viable alternative to multiple breath-hold acquisitions.
This advancement reduces risks associated with breath-hold variations, enhances patient comfort, and facilitates clinical integration of DENSE MRI.