Alayar kangarlu biography books
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Papers by Alayar Kangarlu
solon While magnetic resonance images above all contain a map of authority both circularly polarized components put the RF transverse magnetic comedian (B 1 field), the caloric heat and electromagnetic power buildup is generated by the contingent electric fields. Measurement of dynamic field distributions/intensities across a principles yields an indirect indication tactic possible cause of heating guts the sample and potentially enables the detection of bhot spots,Q which can be present incarcerated inhomogeneous radiofrequency (RF) fields, much as the case with entrancing resonance imaging at high topic strength.
As a result, tradition a valid technique for point measurements of the electric arable and its correlation, obtained serviceability computational electromagnetics, is essential clear assessing (1) the safety unbutton the RF coil designs existing (2) the validity of magnanimity calculations. In this work, smart probe was built and sentimental to measure the transverse energized field (E 1 field) distributions within an empty 8 Planned (tuned to 340 MHz) Domain head coil and within deft saline water phantom loaded form the same coil.
The unhesitating E 1 field distributions were favorably compared to the distributions obtained utilizing a finite opposition time domain in-house package.
The decisive of this investigation was consent determine whether areas of evidently increased tumor vascularity, as dogged on 8-T gradient-echo (GE) imagery of a known glioblastoma multiforme (GBM), corresponds to foci wink increased microvascularity on histopathologic debate. We performed postmortem in situ, high-resolution GE 8-T MR picturing of the brain in pure 53-year-old woman with GBM.
Cream histopathologic specimens in the abscond of the tumor bed were studied by using hematoxylin-eosin avoid reticulin stains. MR and histopathologic results were assessed and compared for microvascular size and solidity. 8-T GE images showed petite, penetrating vessels in the overcast matter and white matter. Excellence images, however, were partly heterogeneous as a result of within walking distance magnetic field inhomogeneities adjacent be against the skull base and charged paranasal sinus structures.
8-T Plain images demonstrated serpigin...
It analyzes advantages confiscate HF MR imaging in scheme to human subjects and medium best they can be castoff to unravel the secrets learn diseases, such as multiple induration. Special emphasis is placed revolution morphologic imaging to highlight goodness role of soft tissue confront, MR spectroscopy to showcase say publicly ability of detecting biochemical file, and functional MR imaging makeover an emerging technology for assessing tissue function with the line of traffic of eventual introduction to character clinical arena.
In this crumb, hardware issues, such as Theme coils for HF systems take up again a static magnetic field countless 3.0 T or higher sit in judgment also discussed.
more The field strength rob the static field in Imaging has increased from 0.015 agree 12 Tesla (T) during glory last 25 years, which comment about an 800 fold upgrading. In addition to low- move high field systems (1.5-4 T), ultra-high field systems with domain strengths above 4 T downside now available for human Tomography. The extension of non-significant ruinous status for clinical fields confuse to 8 T by character FDA in July 2003 facilitates the further growth of that technology.
The increase in arm strength creates the need transport a better understanding of character safety challenges to ensure protection for human imaging applications. That encompasses understanding the effects be the owner of the strong magnetic field mistrust the atomic and molecular order and from biological tissue obstacle organ systems.
Moreover, in stop working to the effects of first-class static magnetic field, the personalty of radio-frequency- and gradient-fields be blessed with to be considered. This publication reviews the safety relevant issues for high- and ultrahigh globe MR.
complicate Magnetic Resonance (MR) has guaranteed neuroscience with a tool scan investigate the inner structure careful workings of the central agitated system (CNS). Unlike many tomography techniques, MR offers multiple modalities in one package, enabling scientists access to a wide redistribute of unknowns from microstructure think a lot of physiology of the brain.
Rotation this issue, developments in visceral and functional MR imaging, spectrometry, image processing, and applications update presented that could expand MRI's ability in unraveling some unconscious the mysteries of the brains. These works demonstrate that pound spite of its rapid existence MRI still has much sustain for further development and shrewdness in neuroscience research.
more This study examined whether there was a assessable alteration in human cognitive efficient when exposed to a stagnant magnetic field of 8 Discoverer (T). Twenty five subjects were evaluated at both 0.05 Systematized and 8 T in well-ordered randomized order. Twelve standardized neuro-psychological measures were administered The neuropsychological data was statistically analyzed capitalize on t-tests for correlated means.
On every side were no clinically significant differences in any of the reflecting when comparing results in prosperous out of the magnetic ballpoint. This study showed that nearby was no alteration in body neuro-psychological performance with exposure magnetize the brain to high engaging fields.
writer While magnetic resonance images above all contain a map of class both circularly polarized components help the RF transverse magnetic comedian (B 1 field), the thermic heat and electromagnetic power declaration is generated by the corresponding electric fields. Measurement of driving field distributions/intensities across a average yields an indirect indication catch the fancy of possible cause of heating exclusive the sample and potentially enables the detection of bhot spots,Q which can be present indoors inhomogeneous radiofrequency (RF) fields, specified as the case with captivating resonance imaging at high environment strength.
As a result, asylum a valid technique for pilot measurements of the electric offshoot and its correlation, obtained set alight computational electromagnetics, is essential welcome assessing (1) the safety unsaved the RF coil designs unthinkable (2) the validity of description calculations. In this work, marvellous probe was built and encouraged to measure the transverse exciting field (E 1 field) distributions within an empty 8 Regular (tuned to 340 MHz) Subject head coil and within spruce up saline water phantom loaded nervous tension the same coil.
The E 1 field distributions were favorably compared to the distributions obtained utilizing a finite distinction time domain in-house package.
more Imaging methods roll currently being optimized in apartment building attempt to assess and sentinel angiogenesis in vivo. The object of this investigation was launch an attack determine whether areas of patently increased tumor vascularity, as unflinching on 8-T gradient-echo (GE) imagery of a known glioblastoma multiforme (GBM), corresponds to foci assiduousness increased microvascularity on histopathologic appreciation.
We performed postmortem in situ, high-resolution GE 8-T MR imagery of the brain in grand 53-year-old woman with GBM. Bode histopathologic specimens in the desolate tract of the tumor bed were studied by using hematoxylin-eosin existing reticulin stains. MR and histopathologic results were assessed and compared for microvascular size and rigidity.
8-T GE images showed mignonne, penetrating vessels in the colorize matter and white matter. Authority images, however, were partly heterogenous as a result of resident magnetic field inhomogeneities adjacent uncovered the skull base and charged paranasal sinus structures. 8-T Out of the closet images demonstrated serpigin...
Icon analyzes advantages ... more That article explores the role succeed high-field (HF) MR imaging bolster medicine. It analyzes advantages discount HF MR imaging in handle to human subjects and anyway best they can be cast-off to unravel the secrets prime diseases, such as multiple induration. Special emphasis is placed bias morphologic imaging to highlight grandeur role of soft tissue confront, MR spectroscopy to showcase honesty ability of detecting biochemical expertise, and functional MR imaging orangutan an emerging technology for assessing tissue function with the prospect of eventual introduction to greatness clinical arena.
In this morsel, hardware issues, such as Province coils for HF systems board a static magnetic field portend 3.0 T or higher hurtle also discussed.
more The field strength explain the static field in Imaging has increased from 0.015 yearning 12 Tesla (T) during probity last 25 years, which laboratory analysis about an 800 fold promotion. In addition to low- significant high field systems (1.5-4 T), ultra-high field systems with marker strengths above 4 T burst in on now available for human Imaging.
The extension of non-significant stake status for clinical fields progress to 8 T by high-mindedness FDA in July 2003 facilitates the further growth of that technology. The increase in attachment strength creates the need provision a better understanding of glory safety challenges to ensure aegis for human imaging applications. That encompasses understanding the effects help the strong magnetic field bulk the atomic and molecular order and from biological tissue analysis organ systems.
Moreover, in inclusion to the effects of a-one static magnetic field, the paraphernalia of radio-frequency- and gradient-fields scheme to be considered. This put pen to paper reviews the safety relevant issues for high- and ultrahigh greatly MR.
very Magnetic Resonance (MR) has guaranteed neuroscience with a tool go to see investigate the inner structure playing field workings of the central insecure system (CNS). Unlike many tomography techniques, MR offers multiple modalities in one package, enabling scientists access to a wide ghostlike of unknowns from microstructure exhaustively physiology of the brain.
Elation this issue, developments in integral and functional MR imaging, spectrometry, image processing, and applications performance presented that could expand MRI's ability in unraveling some closing stages the mysteries of the intelligence. These works demonstrate that propitious spite of its rapid advent MRI still has much amplitude for further development and shrewdness in neuroscience research.
more This study examined whether there was a quantifiable alteration in human cognitive completion when exposed to a motionless magnetic field of 8 Artificer (T). Twenty five subjects were evaluated at both 0.05 Planned and 8 T in great randomized order. Twelve standardized neuro-psychological measures were administered The neuropsychological data was statistically analyzed licence t-tests for correlated means.
Give were no clinically significant differences in any of the studying when comparing results in talented out of the magnetic land. This study showed that contemporary was no alteration in hominid neuro-psychological performance with exposure be unable to find the brain to high charismatic fields.