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, 40 8 Coronal slices acquired in Diff-UTE for ? 1 of 1.0 (a) and 3.0 ms (b) in Diff-UTE, and for T I of 11.5 (c) and 12.3 ms (d) in IR-UTE. The same contrast window levels is used in each view. T R is kept constant in both sequences in each column {a,c} and {b,d}. Experimental SNR ratios of the short-T 2 component generated between Diff-UTE and IR-UTE amount to 1.49 for T R = 31.07 ms, and 2.31 for T R = 33.07 ms, Effect of the Diff-UTE suppression scheme for four preparation flip angle ? 1 values: ? 1 = 60 ? (a), ? 1 = 70 ? (b), ? 1 = 80 ? (c) and ? 1 = 90 ? (d) against spoiling gradient moment G?

, Diff-UTE (b) and IR-UTE (c). The same dynamic range was used in all four UTE images. The bone ROI used for SNR analysis between Diff-UTE and IR-UTE is drawn in red on the sagittal view of the Diff-UTE column (b). The noise ROI (not shown) was drawn far from the head in an artifact-free area, Coronal (top row) and sagittal (bottom row) views of the fixed mouse head in FLASH (a)

List of Tables 1 Summary of the components' relevant parameters influencing their magnetization. Symbols in parenthesis, if any, indicate the tendencies of the corresponding parameter that would maximize the short-T 2 component signal in Diff-UTE, p.34 ,