Biological effects and health implications in magnetic resonance imaging

Kangarlu, Allahyar; Robitaille, Pierre‐Marie

doi:10.1002/1099-0534(2000)12:5<321::aid-cmr4>3.0.co;2-j

Cited by 87 publications

(32 citation statements)

References 159 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Vertigo, which was reported by a single volunteer, can potentially occur at high fields. It is likely to be caused by small magnetohydrodynamic forces acting on the endolymphatic tissues of the inner ear and does not appear to be harmful [10,11].…”

Section: Discussionmentioning

confidence: 99%

Magnetic resonance imaging protocols for examination of the neurocranium at 3 T

et al. 2003

View full text Add to dashboard Cite

The increasing availability of high-field (3 T) MR scanners requires adapting and optimizing clinical imaging protocols to exploit the theoretically higher signal-to-noise ratio (SNR) of the higher field strength. Our aim was to establish reliable and stable protocols meeting the clinical demands for imaging the neurocranium at 3 T. Two hundred patients with a broad range of indications received an examination of the neurocranium with an appropriate assortment of imaging techniques at 3 T. Several imaging parameters were optimized. Keeping scan times comparable to those at 1.5 T we increased spatial resolution. Contrast-enhanced and non-enhanced T1-weighted imaging was best applying gradient-echo and inversion recovery (rather than spin-echo) techniques, respectively. For fluid-attenuated inversion recovery (FLAIR) imaging a TE of 120 ms yielded optimum contrast-to-noise ratio (CNR). High-resolution isotropic 3D data sets were acquired within reasonable scan times. Some artifacts were pronounced, but generally imaging profited from the higher SNR. We present a set of optimized examination protocols for neuroimaging at 3 T, which proved to be reliable in a clinical routine setting.

show abstract

Section: Discussionmentioning

confidence: 99%

Magnetic resonance imaging protocols for examination of the neurocranium at 3 T

et al. 2003

View full text Add to dashboard Cite

show abstract

“…Electric currents are to be expected if the body is moved through the main magnetic field, i.e., from outside the scanner room into the center of the scanner (maximum field strength). Movement through this spatially variable field might be the most important difference compared to lower-field magnets regarding the side effects [6], as induced currents inside the body depend on dB/dt. Even in the stationary situation, currents may also occur due to flowing blood [7,8].…”

Section: Introductionmentioning

confidence: 99%

“…Many short-term effects related to exposure to timevarying or static main magnetic fields have been described with non-serious consequences for humans [6]. They have been most often discussed in the context of high field so far [11][12][13][14][15][16][17][18], but are not specific to ultra-high-field systems, although their incidence and severity are expected to increase with field strength.…”

Section: Introductionmentioning

confidence: 99%

Subjective acceptance of 7 Tesla MRI for human imaging

Theysohn

Maderwald

Kraff

et al. 2007

Magn Reson Mater Phy

138

100

View full text Add to dashboard Cite

show abstract

“…These include: the suppression of eddy currents via shielding (see for example, [14][15][16]); avoiding peripheral nerve stimulation (see for example, [17][18][19]); alleviating patient claustrophobia (see for example, [20]); and minimising acoustic noise caused by Lorentz forces (see for example, [21][22][23][24]). …”

Section: Introductionmentioning

confidence: 99%