title: Hepatic metastases: CT versus MR imaging at 1.5T.
abstract: A prospective multi-institutional study was performed to compare the sensitivity of computed tomography (CT) and high-field magnetic resonance (MR) imaging (1.5T) in the detection of hepatic metastases. T1-weighted and 72-weighted spin-echo (SE) MR images were compared with noncontrast, dynamic, and delayed CT. Sixty-nine oncology patients were studied. Noncontrast CT showed an overall sensitivity of 57%, dynamic CT 71%, delayed CT 72%, T1-weighted SE MR 47%, and T2-weighted SE MR 78%. Although there was no statistically significant (p less than 0.05) difference among dynamic CT, delayed CT, and T2-weighted SE MR, these three methods were significantly more sensitive (p less than 0.005) than noncontrast CT or T1-weighted SE MR. T2-weighted SE MR was significantly more sensitive (p less than 0.006) than CT or T1-weighted SE MR in the detection of small (less than 1 cm) lesions. CT was more sensitive in the detection of extrahepatic disease. These data confirm the superiority of T2-weighted SE over T1-weighted SE pulse sequences at 1.5T.
authors.affiliation: Emory University School of Medicine, Atlanta, Georgia 30322.
authors.forename: V G
authors.initials: VG
authors.lastname: Vassiliades
authors.forename: W D
authors.initials: WD
authors.lastname: Foley
authors.forename: J
authors.initials: J
authors.lastname: Alarcon
authors.forename: T
authors.initials: T
authors.lastname: Lawson
authors.forename: S
authors.initials: S
authors.lastname: Erickson
authors.forename: J B
authors.initials: JB
authors.lastname: Kneeland
authors.forename: H V
authors.initials: HV
authors.lastname: Steinberg
authors.forename: M E
authors.initials: ME
authors.lastname: Bernardino
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D008113:Liver Neoplasms / Q000175:diagnosis* / Q000556:secondary*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed