title: Simultaneous 3D NMR spectroscopy of fluorine and phosphorus in human liver during 5-fluorouracil chemotherapy.
abstract: Simultaneous multivoxel 31P and 19F 3D localized NMR spectroscopy is demonstrated on a phantom and in the liver of patients undergoing bolus-infusion 5-fluorouracil chemotherapy. The 19F and 31P spectra were localized with 8 x 8 x 8 3D chemical-shift imaging, with both nuclei sharing the same field of view and voxel size (27 and 64 ml in phantom and liver, respectively) using a 1.5-Tesla clinical imager with two RF channels and a dual-tuned surface coil. The repetition time (TR = 0.26 s) and Ernst nutation angles (theta E = 32 degrees for 19F, 28 degrees for 31P) were chosen to optimize the signal-to-noise ratio (SNR) per-unit time for the 0.5- to 2-s T1 range of the 19F and 31P metabolites of interest. The overall examination time, including tuning, imaging, shimming and dual-nuclear spectroscopy, was under 90 min. Simultaneous acquisition of 31P and 19F spectra will permit the study of the influence of hepatic and/or tumor metabolism on the uptake and catabolism of fluoropyrimidine drugs with no extra measurement time.
authors: Department of NMR and Medical Spectroscopy, Fox Chase Cancer Center, Philadelphia, PA 19111, USA.
authors: C W
authors: CW
authors: Li
authors: O
authors: O
authors: Gonen
mesh_terms: D000328:Adult; D000964:Antimetabolites, Antineoplastic / Q000627:therapeutic use*; D005461:Fluorine / Q000378:metabolism*; D005472:Fluorouracil / Q000627:therapeutic use*; D006801:Humans; D008099:Liver / Q000378:metabolism*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008297:Male; D019047:Phantoms, Imaging; D010758:Phosphorus / Q000378:metabolism*
chemical_list: D000964:Antimetabolites, Antineoplastic; D010758:Phosphorus; D005461:Fluorine; D005472:Fluorouracil