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a lower signal intensity on the out-of-phase images. We often use this clinically to look for hepatic steatosis or intravoxel fat in an adrenal adenoma. Note that
To calculate how much water you should drink daily to maintain a healthy amount of water in your body, divide your weight in pounds by 2 and drink that amount in ounces. Müller S. Multifrequency selective rf pulses for multislice MR imaging. Magn Reson Med. 1988; 6: 364- 371. It’s been used for over 1 000 years in Asia as a recovery treatment from long nights of partying; helps detoxifyKirchgesner T, Perlepe V, Michoux N, Larbi A, Vande BB. Fat suppression at 2D MR imaging of the hands: Dixon method versus CHESS technique and STIR sequence. Eur J Radiol. 2017;89:40–6. We have shown that the Simultaneous Multiple Resonance Frequency imaging approach can be used to concurrently generate separate images of fat and water and to correct chemical shift effects. In addition to facilitating the assessment of overlapping fat-based and water-based structures, it is expected to bring benefits for methods based on the signal phase, such as Quantitative Susceptibility Mapping, in which chemical shift effects lead to errors in field estimation. 56 SMURF could also be used to quantify fat content 57 and to calculate separate relaxation constants of fat and water in mixed tissues. 58- 60 The SMURF approach could also be used to simultaneously image other chemical species, such as PCr and PCi 61 or hyperpolarized 13C pyruvate, lactate and alanine 62- 64 and could be extended to allow simultaneous imaging of three or more species. 6 CONCLUSION https://med.libretexts.org/Bookshelves/Health_and_Fitness/Concepts_of_Fitness_and_Wellness_(Flynn_et_al.)/06%3A_Body_Composition/6.03%3A_How_Much_Fat_is_Needed Moliere S, Dillenseger JP, Ehlinger M, Kremer S, Bierry G. Comparative study of fat-suppression techniques for hip arthroplasty MR imaging. Skelet Radiol. 2017;46(9):1209–17.
the frequency difference between fat and water is γ H * B 0 * 3.5/1,000,000 = 224 Hz at 1.5 T. That means that signal from
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Adan A. Cognitive performance and dehydration. J Am Coll Nutr. 2012;31(2):71-8. doi:10.1080/07315724.2012.10720011 Moon-Ho Song S, Napel S, Pelc NJ, Glover GH. Phase unwrapping of MR phase images using Poisson equation. IEEE Trans Image Process. 1995; 4: 667- 676.