For phantom models with PET/MR imaging that use 18F-FDG, triethylene glycol may be the ideal fluid, according to a study published in The Journal of Nuclear Medicine. "Compared to water, both triethylene glycol and monoethylene glycol improve MR homogeneity notably and therefore enable phantom imaging, even with RF intensive MR sequences in the given phantom and in phantoms of comparable size," researchers said. One limitation with the method is that operators will need to manually adjust attenuation values for glycols and the materials used in the models to be able to achieve the best scan.

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