title: Hyperpolarized (129)Xe dynamic study in mouse lung under spontaneous respiration: application to murine tumor B16BL6 melanoma.
abstract: This is a study on the analysis of hyperpolarized (HP) (129)Xe dynamics applied in the lung of a pathological model mouse under spontaneous respiration. A novel parameter k(1)k(2) - a product of the rate constant for Xe transfer from gas to dissolved phase (k(1)) and from dissolved to gas phase (k(2)) - was shown to be derived successfully from the analysis of the HP (129)Xe dynamic MR experiment in the mouse lung under spontaneous respiration with the aid of a selective pre-saturation technique. A comparative study using healthy mice and model mice induced with lung cancer (by injection of murine tumor B16BL6 melanoma) was performed and a significant difference was found in the k(1)k(2) values of the two groups, that is, 0.020+/-0.007s(-2) (n=4) for healthy mice and 0.032+/-0.04s(-2) (n=3) for lung cancer model mice (p=0.04). Thus, the parameter obtained by our proposed method is considered useful for detection of lung tumors.
authors.affiliation: Department of Medical Physics and Engineering, Division of Health Sciences, Graduate School of Medicine, Osaka University, 1-7 Yamadaoka, Suita, Osaka 565-0871, Japan. h.imai@sahs.med.osaka-u.ac.jp
authors.forename: Hirohiko
authors.initials: H
authors.lastname: Imai
authors.forename: Atsuomi
authors.initials: A
authors.lastname: Kimura
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Ito
authors.forename: Hideaki
authors.initials: H
authors.lastname: Fujiwara
mesh_terms: D000280:Administration, Inhalation; D000818:Animals; D045744:Cell Line, Tumor; D003287:Contrast Media / Q000008:administration & dosage; D008175:Lung Neoplasms / Q000175:diagnosis*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008545:Melanoma / Q000175:diagnosis*; D051379:Mice; D019275:Radiopharmaceuticals / Q000008:administration & dosage; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014979:Xenon Isotopes / Q000008:administration & dosage
chemical_list: D003287:Contrast Media; D019275:Radiopharmaceuticals; D014979:Xenon Isotopes