scholarly journals Patient Position Detection for SAR Optimization in Magnetic Resonance Imaging

2006 ◽  
pp. 49-57 ◽  
Author(s):  
Andreas Keil ◽  
Christian Wachinger ◽  
Gerhard Brinker ◽  
Stefan Thesen ◽  
Nassir Navab
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Resonance Imaging ◽  
Position Detection ◽  
Patient Position

scholarly journals Patient position verification in magnetic-resonance imaging only radiotherapy of anal and rectal cancers

2021 ◽  
Vol 19 ◽  
pp. 72-77
Author(s):  
David Bird ◽  
Matthew Beasley ◽  
Michael G. Nix ◽  
Marcus Tyyger ◽  
Hazel McCallum ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Resonance Imaging ◽  
Patient Position ◽  
Rectal Cancers

scholarly journals Towards an image-guided restricted drug release in friendly implanted therapeutics

2018 ◽  
Vol 82 (3) ◽  
pp. 31401
Author(s):  
Adel Razek
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Drug Release ◽  
Minimally Invasive ◽  
Electromagnetic Compatibility ◽  
Resonance Imaging ◽  
Mr Image ◽  
Image Guided ◽  
Compatibility Analysis ◽  
Position Detection

This review aims to expose a possible therapeutics scheme of using active implants for restricted drug release accounting for friendly wellbeing and security of patient. The review of embedded therapeutics, regulated drug administration, minimally-invasive issues and governing non-ionizing position detection suggested a possible MR image-guided approach. The magnetic resonance imaging is then investigated and its environmental compatibility is explored through electromagnetic compatibility analysis for embedded therapeutics.

Oblique Views in Magnetic Resonance Imaging of the Heart by Combined Axial Rotations

1987 ◽  
Vol 28 (5) ◽  
pp. 497-503 ◽  
Author(s):  
A. C. Van Rossum ◽  
F. C. Visser ◽  
M. J. Van Eenige ◽  
J. Valk ◽  
J. P. Roos
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Left Ventricle ◽  
Imaging Modalities ◽  
Short Axis ◽  
Anatomic Variations ◽  
Resonance Imaging ◽  
Patient Position

Magnetic resonance imaging of the heart, and more specifically of the left ventricle (LV), is optimized by using oblique imaging planes adapted to the long and short axes of the LV, comparable to other imaging modalities in cardiology. We report a procedure to perform two chamber views, four chamber views and true short axis views by combinations of electronic axial rotations. The technique of selecting appropriate gradient angles is explained. Thus, there is no requirement for altering patient position in the imager, while individual anatomic variations are taken into account.

Functional information from magnetic resonance imaging

1995 ◽  
Vol 53 ◽  
pp. 84-85
Author(s):  
Alan P. Koretsky ◽  
Afonso Costa e Silva ◽  
Yi-Jen Lin
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
High Resolution ◽  
Cancer Biology ◽  
Imaging Modality ◽  
Magnetic Resonance Images ◽  
Great Success ◽  
Functional Information ◽  
Resonance Imaging ◽  
High Resolution Mri

Magnetic resonance imaging (MRI) has become established as an important imaging modality for the clinical management of disease. This is primarily due to the great tissue contrast inherent in magnetic resonance images of normal and diseased organs. Due to the wide availability of high field magnets and the ability to generate large and rapidly switched magnetic field gradients there is growing interest in applying high resolution MRI to obtain microscopic information. This symposium on MRI microscopy highlights new developments that are leading to increased resolution. The application of high resolution MRI to significant problems in developmental biology and cancer biology will illustrate the potential of these techniques.In combination with a growing interest in obtaining high resolution MRI there is also a growing interest in obtaining functional information from MRI. The great success of MRI in clinical applications is due to the inherent contrast obtained from different tissues leading to anatomical information.

Functional Magnetic Resonance Imaging Measures of Blood Flow Patterns in the Human Auditory Cortex in Response to Sound

1998 ◽  
Vol 41 (3) ◽  
pp. 538-548 ◽  
Author(s):  
Sean C. Huckins ◽  
Christopher W. Turner ◽  
Karen A. Doherty ◽  
Michael M. Fonte ◽  
Nikolaus M. Szeverenyi
Keyword(s):  
Magnetic Resonance Imaging ◽  
Blood Flow ◽  
Magnetic Resonance ◽  
Functional Magnetic Resonance Imaging ◽  
Functional Magnetic Resonance ◽  
Resonance Imaging ◽  
Speech Stimuli ◽  
Complex Stimuli ◽  
Scanning Session ◽  
Auditory Research

Functional Magnetic Resonance Imaging (fMRI) holds exciting potential as a research and clinical tool for exploring the human auditory system. This noninvasive technique allows the measurement of discrete changes in cerebral cortical blood flow in response to sensory stimuli, allowing determination of precise neuroanatomical locations of the underlying brain parenchymal activity. Application of fMRI in auditory research, however, has been limited. One problem is that fMRI utilizing echo-planar imaging technology (EPI) generates intense noise that could potentially affect the results of auditory experiments. Also, issues relating to the reliability of fMRI for listeners with normal hearing need to be resolved before this technique can be used to study listeners with hearing loss. This preliminary study examines the feasibility of using fMRI in auditory research by performing a simple set of experiments to test the reliability of scanning parameters that use a high resolution and high signal-to-noise ratio unlike that presently reported in the literature. We used consonant-vowel (CV) speech stimuli to investigate whether or not we could observe reproducible and consistent changes in cortical blood flow in listeners during a single scanning session, across more than one scanning session, and in more than one listener. In addition, we wanted to determine if there were differences between CV speech and nonspeech complex stimuli across listeners. Our study shows reproducibility within and across listeners for CV speech stimuli. Results were reproducible for CV speech stimuli within fMRI scanning sessions for 5 out of 9 listeners and were reproducible for 6 out of 8 listeners across fMRI scanning sessions. Results of nonspeech complex stimuli across listeners showed activity in 4 out of 9 individuals tested.

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