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Result : Searchterm 'Digital' found in 3 terms [ ] and 25 definitions [ ]
| previous 11 - 15 (of 28) nextResult Pages : [1] [2 3 4 5 6] | ![](gifs/nb.gif) | | ![](gifs/mores_2.gif) | Searchterm 'Digital' was also found in the following services: | | | | |
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'Next generation MRI system 1.5T CHORUS developed by ISOL Technology is optimized for both clinical diagnostic imaging and for research development.
CHORUS offers the complete range of feature oriented advanced imaging techniques- for both clinical routine and research. The compact short bore magnet, the patient friendly design and the gradient technology make the innovation to new degree of perfection in magnetic resonance.'
Device Information and Specification
CLINICAL APPLICATION
Whole body
Spin Echo, Gradient Echo, Fast Spin Echo,
Inversion Recovery ( STIR, Fluid Attenuated Inversion Recovery), FLASH, FISP, PSIF, Turbo Flash ( MPRAGE ),TOF MR Angiography, Standard echo planar imaging package (SE-EPI, GE-EPI), Optional:
Advanced P.A. Imaging Package (up to 4 ch.), Advanced echo planar imaging package,
Single Shot and Diffusion Weighted EPI, IR/FLAIR EPI
STRENGTH
20 mT/m (Upto 27 mT/m)
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Convolution is a mathematical way of combining two signals to form a third signal. It is the single most important technique in digital signal processing. This operation is mostly used together with Fourier transformations for MRI signal / image processing. | | ![spacer](gifs/nb.gif) | | • View the DATABASE results for 'Convolution' (2).![Open this link in a new window](gifs/nw3_g.gif)
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Process of conversion of continuous ( analog) signals, such as the detected MR signal (voltage), into numbers. This is carried out with an analog to digital converter. There are two kinds of discretization involved: the voltage is only measured (sampled) at particular discrete times, and only voltages within a particular range and separated by a particular minimum amount can be distinguished. Voltages beyond this range are said to exceed the dynamic range of the digitizer. | | ![spacer](gifs/nb.gif) | | • View the DATABASE results for 'Digitization' (9).![Open this link in a new window](gifs/nw3_g.gif)
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Quick Overview
Please note that there are different common names for this artifact.
HELP
Larger range of sensitivity
Noise introduced into digitized signals by the finite voltage resolution of the digitizer.
You can see the effects of quantization if the noise level is smaller than the digitizer quantum.
If the signal dynamic range is too great, the highest intensities from overloading the digitizer may result in the weaker features being lost in the digitization noise.
Image Guidance
This can be resolved by using an analog to digital converter with a larger range of sensitivity or by using techniques to reduce the dynamic range, e.g. suppressing the signal from water in order to detect the signal from less abundant compounds. | | ![spacer](gifs/nb.gif) | | • View the DATABASE results for 'Digitization Noise Artifact' (2).![Open this link in a new window](gifs/nw3_g.gif)
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The range of signal intensities that may need to be distinguished in an image or spectrum or that can be distinguished by the electronic components. If the signal dynamic range is too great, the need to keep the highest intensities from overloading the digitizer may result in the weaker features being lost in the digitization noise. This can be dealt with by using an analog to digital converter with a larger range of sensitivity or by using techniques to reduce the dynamic range, e.g. suppressing the signal from water in order to detect the signal from less abundant compounds. | | ![spacer](gifs/nb.gif) | | • View the DATABASE results for 'Dynamic Range' (7).![Open this link in a new window](gifs/nw3_g.gif)
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