Ascendancy
发表于 2025-3-23 12:34:10
https://doi.org/10.1007/978-3-642-30696-9points in the signal and those in the image. There is an inverse relationship between the image space and k-space. Whereas the coordinates of the image are spatial position (.) the coordinates of k-space are . and ., sometimes referred to as spatial frequencies .. and ... A low spatial frequency con
LINES
发表于 2025-3-23 17:52:18
https://doi.org/10.1007/978-3-642-30699-0 resolution of the image. These parameters, together with the thickness of the selected 2D image slice, also determine the voxel dimensions. The voxel volume strongly influences the size of the signal. The signal to noise ratio (SNR) is a major determinant of image quality in MRI. There is an interd
lethal
发表于 2025-3-23 18:42:52
https://doi.org/10.1007/978-3-642-30699-0eing closer to the region of interest while receiving less noise from outside the region of interest. Appropriate coil selection is particularly important for paediatric applications. Array coils with multiple receiver elements provide improved SNR over a large field of view. Multi-element coils can
Endemic
发表于 2025-3-23 23:23:31
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多山
发表于 2025-3-24 02:36:39
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heartburn
发表于 2025-3-24 06:47:21
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才能
发表于 2025-3-24 11:59:36
https://doi.org/10.1007/978-3-642-30699-0imaging uses the ECG signal to trigger the image data acquisition at a single chosen trigger delay after the R-wave. Still imaging is used to image cardiac anatomy, for tissue characterisation or to image the coronary arteries. Cine imaging acquires image data at multiple time points (cardiac phases
助记
发表于 2025-3-24 16:01:26
https://doi.org/10.1007/978-3-642-30699-0s of respiratory motion can be limited by respiratory compensation or respiratory gating. Respiratory gating only accepts image data that is acquired at one phase of the respiratory cycle (usually end expiration). The respiratory position is monitored either by a pneumatic bellows device, or by the
cinder
发表于 2025-3-24 20:29:58
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畏缩
发表于 2025-3-25 00:13:16
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