Chemical shift artifact-free microscopy: Spectroscopic microimaging of the human skin

Weis, Ján; Ericsson, Anders; Hemmingsson, Anders

doi:10.1002/(sici)1522-2594(199905)41:5<904::aid-mrm8>3.0.co;2-4

Cited by 32 publications

(18 citation statements)

References 17 publications

(24 reference statements)

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“…All MR measurements were performed on a 1.5-T scanner (Intera, Philips Healthcare, Best, the Netherlands) using a quadrature receiver head coil. MRSI sequence was based on a 2D radiofrequency spoiled gradient echo [16]. The spectral information was encoded by incrementing the echo time TE m = TE 1 ?…”

Section: Methodsmentioning

confidence: 99%

Brain temperature in volunteers subjected to intranasal cooling

et al. 2011

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Section: Methodsmentioning

confidence: 99%

Brain temperature in volunteers subjected to intranasal cooling

et al. 2011

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“…The first Fourier transform was performed along the axis k m . The data matrix was then corrected for chemical-shift artifacts using a first-order phase correction [8]. Data processing continued by spatial 2D Fourier transform in the read (k read ) and phase-encoding (k phase ) dimensions.…”

Section: Methodsmentioning

confidence: 99%

“…We found this integration range to be a good compromise between SNR and mutual contamination of the water and fat line caused by the spectral line overlapping. All the data processing steps have been described in more detail elsewhere [8,9].…”

Section: Methodsmentioning

confidence: 99%

“…Such large chemical-shift artifacts could, however, be unacceptable in the case of subcutaneous tissues. We previously described the spectroscopic micro-imaging technique [8,9] that produces high-resolution water, fat and chemical-shift artifact-free images. These studies were, however, performed with healthy volunteers and under laboratory conditions.…”

Section: Introductionmentioning

confidence: 99%

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Chemical-shift micro-imaging of subcutaneous lesions

Weis

Åström

Vinnars

et al. 2005

MAGMA

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A chemical-shift imaging technique was used for the study of small subcutaneous lesions. This study concerns micro-imaging of two females suffering from a tenosynovial giant cell tumor and an epidermal cyst. High-resolution water, fat and chemical-shift artifact-free images were obtained on a whole-body MR unit (1.5 T) equipped with a 23-mm microscopy surface coil and standard gradients (23 mT/m). A significant improvement in signal-to-noise ratio was achieved by reducing the receiver bandwidth to values below +/-10 kHz. The image data sets were acquired with resolution 0.1 x 0.13 mm in the plane, slice thickness 0.5 mm and with acquisition time less than 3 min. Spatial resolution, fat suppression, image texture and edge delineation were improved on spectroscopic images compared with those on conventional MR images.

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“…The derived theory makes it possible to estimate the limits for respective inaccuracies in matching and tuning and the experimental results indicate how to utilize the theory. The articles dealing with RF coils for NMR and some other parts helpful for successful results of experiments [4][5][6][7][8][9][10][11][12][13][14][15][16][17] have focused on both low-field NMR and high-field scanners. The tested methods are mainly useful for experimental work.…”

Section: Introductionmentioning

confidence: 99%