[High concentration ferric ammonium citrate (FAC) solution as a negative bowel contrast agent].
Various concentrations of ferric ammonium citrate (FAC) solution were scanned with conventional SE, Turbo SE (TSE) and STIR sequences on a 0.5-T MR unit. High-concentration FAC solution showed significant signal loss on T2-weighted images. Signal loss was more prominent on heavily T2-weighted images with longer TR/TE using the TSE sequence. T1-weighted images did not show significant signal loss even with high-concentration solution. On STIR images, remarkable signal loss occurred at twice the concentration that had a T1 value similar to fat. We concluded that high-concentration FAC solution may employ as a negative contrast agent in upper abdominal MR imaging.
Takahara
T
T
Department of Radiology, St. Marianna University.
Yoshikawa
T
T
Saeki
M
M
Nosaka
S
S
Shimoyamada
K
K
Nakajima
Y
Y
Ishikawa
T
T
D000005:Abdomen / Q000473:pathology; D003287:Contrast Media; D005290:Ferric Compounds; D006801:Humans; D008279:Magnetic Resonance Imaging; D000644:Quaternary Ammonium Compounds; D012996:Solutions
D003287:Contrast Media; D005290:Ferric Compounds; D000644:Quaternary Ammonium Compounds; D012996:Solutions; C013531:ferric ammonium citrate