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. Author manuscript; available in PMC: 2022 Oct 1.
Published in final edited form as: J Nucl Cardiol. 2020 Jan 2:10.1007/s12350-019-02002-5. doi: 10.1007/s12350-019-02002-5

Fig. 1.

Fig. 1

a) Water and fat images decomposed from multi-echo radial MR in a slice through the chest including heart and lungs were used to form attenuation maps b) where MRAC-2C is a 2-component attenuation map with the first component including all water-containing soft tissue and fat, and the second component including background air and lung; MRAC-3CF is a 3-component map with water-containing soft tissue, fat, and background (lung set to background air); MRAC-3CL is a 3-component map with water-containing soft tissue (fat set to soft tissue), lung, and background; and MRAC-4C is: a 4-component attenuation map comprising water-containing soft tissue, fat, lung, and background air. The linear attenuation coefficients were, for water-containing soft tissue (yellow) 0.1 cm−1, fat (gold) 0.0854 cm−1, lung (light blue) 0.0224 cm−1 and background air (dark blue) 0 cm−1.