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1H and 19F MRI of fluorinated bile acids. 2-mL glass vials of 30 mM CA-lys-TFA and 30 mM CA-sar-TFMA were imaged adjacent to one another on the same occasion. Analysis of 19F MR images using Bruker ParaVision 5.1 showed that CA-lys-TFA and CA-sar-TFMA phantoms provided identical average signal intensities. This equivalence in intensities reflects that both compounds contain three equivalent fluorines (i.e., possess identical number of fluorine atoms).
