Numerical evaluation of heating in the human head due to magnetic resonance imaging (MRI)

AbstractWhen it comes to examining the brachial plexus, ultrasound (US) and magnetic resonance imaging (MRI) are complementary investigations. US is well placed for screening most extraforaminal pathologies, whereas MRI is more sensitive and accurate for specific clinical indications. For example, MRI is probably the preferred technique for assessment of trauma because it enables a thorough evaluation of both the intraspinal and extraspinal elements, although US can depict extraforaminal neural injury with a high level of accuracy. Conversely, US is probably the preferred technique for examination of neurologic amyotrophy because a more extensive involvement beyond the brachial plexus is the norm, although MRI is more sensitive than US for evaluating muscle denervation associated with this entity. With this synergy in mind, this review highlights the tips for examining the brachial plexus with US and MRI.

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Use of Magnetic Resonance Imaging (MRI) to Determine the 3D Geometry in the Human Rectum

Endoscopy ◽

10.1055/s-2004-834513 ◽

2004 ◽

Vol 36 (10) ◽

Author(s):

BP McMahon ◽

JB Frøkjær ◽

A Bergmann ◽

DH Liao ◽

E Steffensen ◽

...

Keyword(s):

Magnetic Resonance Imaging ◽

Magnetic Resonance ◽

Resonance Imaging ◽

3D Geometry ◽

Human Rectum ◽

Magnetic Resonance Imaging Mri

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Single-point magnetic resonance imaging (MRI) of cement based materials

Materials and Structures ◽

10.1617/14024 ◽

2003 ◽

Vol 36 (257) ◽

pp. 166-182 ◽

Cited By ~ 3

Author(s):

B. J. Balcom

Keyword(s):

Magnetic Resonance Imaging ◽

Magnetic Resonance ◽

Single Point ◽

Resonance Imaging ◽

Cement Based Materials ◽

Magnetic Resonance Imaging Mri

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Magnetic resonance imaging in study of lungs

Medical Visualization ◽

10.24835/1607-0763-2019-4-10-23 ◽

2019 ◽

pp. 10-23

Author(s):

T. A. Akhadov ◽

S. Yu. Guryakov ◽

M. V. Ublinsky

Keyword(s):

Magnetic Resonance Imaging ◽

Magnetic Resonance ◽

Medical Society ◽

Resonance Imaging ◽

Iodinated Contrast ◽

Long Time ◽

Women And Children ◽

Magnetic Resonance Imaging Mri ◽

A Current ◽

Lung Mri

For a long time, there was a need to apply magnetic resonance imaging (MRI) technique for lung visualization in clinical practice. The development of this method is stimulated by necessity of the emergence of an alternative to computed tomography, especially when radiation and injection of iodine-containing contrast agents are contraindicated or undesirable, for example, in pregnant women and children, people with intolerance to iodinated contrast. One of the reasons why lung MRI is still rarely used is lack of elaborated standardized protocols that would be adapted to clinical needs of medical society. This publication is a current literature review on the use of MRI in lung studies.

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26. Nothing but the truth, so help me God: The history of magnetic resonance imaging

Clinical & Investigative Medicine ◽

10.25011/cim.v30i4.2786 ◽

2007 ◽

Vol 30 (4) ◽

pp. 41

Author(s):

A. Dechant

Keyword(s):

Magnetic Resonance Imaging ◽

New York ◽

Nuclear Magnetic Resonance ◽

Magnetic Resonance ◽

Nobel Prize ◽

Resonance Imaging ◽

Solid State Physics ◽

Magnetic Resonance Imaging Mri ◽

The Times ◽

Nuclear Magnetic

On the morning of October 10, 2003, the residents of New York awoke to find that an entire page of their beloved paper, The Times, had been usurped for the sole purpose of flagrant self-promotion and protestation. On his own behalf, Dr. Raymand Damadian had purchased a one page spread bemoaning his exclusion in the Nobel Prize for Medicine that year which had previously been awarded to Paul Laterbur and Peter Mansfield for their contributions to the development of Magnetic Resonance Imaging (MRI). Over the course of the next few months, the public was to witness a series of such articles proclaiming that a shameful wrong had been committed, and that the truth would eventually prove Dr. Damadian’s accusations. That truth lay in the early theoretical and technical foundations that led to the discovery of MRI. Described just after the Second World War, nuclear magnetic resonance (NMR) was hailed as a breakthrough in physical chemistry for which Felix Bloch and Edward Purcell were awarded the Nobel Prize in Physics in 1952. Two decades later, in 1971, Dr. Damadian discovered that differences between the NMR signals of cancerous and normal tissue might provide a rapid means of cancer detection. However, Laterbur and Mansfield were the first to actually demonstrate images of live tissue using the application of magnetic gradients – the key to modern MRI. Though speculation exists that Dr. Damadian may have been excluded from the prize due to his religious beliefs or political rivalry, only time will reveal the whole truth when the Nobel files are opened 50 years hence. Bradley W. The Nobel Prize: Three Investigators Allowed but Two Were Chosen. Journal of Magnetic Resonance Imaging 2004; 19:520. Laterbur P. Image formation by induced local interactions: examples of employing nuclear magnetic resonance. Nature 1973; 242:190-191. Mansfield P, Grannell P. “NMR diffraction in solids?” Journal of Physics C: Solid State Physics 1973; 63:L433-L426.

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Magnetic Resonance Imaging of Pseudo-impingement of Rotator Cuff with Strength Training

10.25259/ijmsr_21_2019 ◽

2019 ◽

Vol 1 ◽

pp. 2-6

Author(s):

Asad Naqvi ◽

Timothy Ariyanayagam ◽

Mir Akber Ali ◽

Akhila Rachakonda ◽

Hema N. Choudur

Keyword(s):

Magnetic Resonance Imaging ◽

Magnetic Resonance ◽

Rotator Cuff ◽

Strength Training ◽

Radiology Department ◽

Resonance Imaging ◽

Subacromial Space ◽

History Of ◽

Magnetic Resonance Imaging Mri ◽

Training Exercises

Objective: The objective of this study was to outline a novel unique concept of secondary impingement of the muscles, myotendons, and tendons of the rotator cuff from hypertrophy as a result of strength training exercises. Methods: In this retrospective observational study, 58 patients were referred for an magnetic resonance imaging (MRI) by the orthopedic surgeon to the radiology department over a period of 1½ years. All patients gave a history of strength training exercises and presented with clinical features of rotator cuff impingement. Results: We identified features of hypertrophy of rotator cuff muscles, myotendons, and tendons in 12 of these 58 patients. This was the only abnormality on MRI. The hypertrophy of rotator cuff muscles and tendon bulk completely filling the subacromial space to the point of overfilling and resulting in secondary compressive features. Conclusion: Rotator cuff impingement is a common phenomenon that can occur with various inlet and outlet pathological conditions. However, rotator cuff impingement may also result from muscle and tendon hypertrophy from strength training regimens. Hypertrophy of the rotator cuff can result in overfilling of the subacromial space, leading to secondary impingement, which we have termed as “pseudo-impingement.”

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