Research Article
SQUID-Based Magnetic Resonance Imaging at Ultra-Low Field Using the Backprojection Method
Figure 12
Images of a phantom containing several rods with different diameters. (a) Photograph of the phantom. (b) 2-D image of the phantom constructed by the backprojection method with rods of different diameters. Figure 12(b) is acquired at the acquisition time of 256 ms with Bp = 500 mT, Bm = 128 μT, and the gradient was ∼160 μT/m. (c) Photograph of a phantom with twelve 1.8 mm diameter rods. (d) 2-D image of the phantom constructed by the backprojection method with 1.8 mm diameter rods. Figure 12(d) was acquired at the acquisition time of 256 ms with Bp = 500 mT, Bm = 128 μT, and the gradient was ∼180 μT/m.
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