9 March 2012 SNR analysis of 3D magnetic resonance tomosynthesis (MRT) imaging
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Abstract
In conventional 3D Fourier transform (3DFT) MR imaging, signal-to-noise ratio (SNR) is governed by the well-known relationship of being proportional to the voxel size and square root of the imaging time. Here, we introduce an alternative 3D imaging approach, termed MRT (Magnetic Resonance Tomosynthesis), which can generate a set of tomographic MR images similar to multiple 2D projection images in x-ray. A multiple-oblique-view (MOV) pulse sequence is designed to acquire the tomography-like images used in tomosynthesis process and an iterative back-projection (IBP) reconstruction method is used to reconstruct 3D images. SNR analysis is performed and shows that resolution and SNR tradeoff is not governed as with typical 3DFT MR imaging case. The proposed method provides a higher SNR than the conventional 3D imaging method with a partial loss of slice-direction resolution. It is expected that this method can be useful for extremely low SNR cases.
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Min-Oh Kim, Min-Oh Kim, Dong-Hyun Kim, Dong-Hyun Kim, "SNR analysis of 3D magnetic resonance tomosynthesis (MRT) imaging", Proc. SPIE 8313, Medical Imaging 2012: Physics of Medical Imaging, 83136C (9 March 2012); doi: 10.1117/12.911199; https://doi.org/10.1117/12.911199
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