title: A multicenter clinical trial of Gadolite Oral Suspension as a contrast agent for MRI.
abstract: The purpose of this study was to assess the effectiveness and safety of Gadolite Oral Suspension as a gastrointestinal (GI) contrast agent for MRI in a phase II and two phase III multicenter clinical trials. Gadolite was administered to 306 patients with known or suspected abdominal and/or pelvic disease. MRI with T1- and T2-weighted sequences was performed before and after ingestion. Efficacy was evaluated by having two masked readers rate the certainty of their MR diagnosis (0 = uncertain, 1 = probable, 2 = definite) on randomly presented pre- and post-Gadolite Oral Suspension enhanced images. Principal investigators also evaluated the images and established the final diagnosis. Vital signs, clinical chemistries, and adverse events were documented. Blood and urine samples were analyzed for gadolinium content to determine whether Gadolite Oral Suspension was absorbed systemically. Certainty in MR diagnosis increased significantly (P < .001) for both blinded readers between pre- and post-Gadolite images (.49-1.18 for reader 1: .46-1.53 for reader 2). Sensitivity, specificity, and accuracy also increased for both masked readers. No gadolinium was detected in blood or urine samples. There were no serious adverse events and no apparent drug-related trends in mean vital signs or laboratory values. Gadolite is a highly effective, safe, and well tolerated contrast agent for clinical use with MRI.
authors.affiliation: Good Samaritan Hospital, San Jose, CA, USA.
authors.forename: D L
authors.initials: DL
authors.lastname: Rubin
authors.forename: K L
authors.initials: KL
authors.lastname: Falk
authors.forename: M J
authors.initials: MJ
authors.lastname: Sperling
authors.forename: M
authors.initials: M
authors.lastname: Ross
authors.forename: S
authors.initials: S
authors.lastname: Saini
authors.forename: B
authors.initials: B
authors.lastname: Rothman
authors.forename: F
authors.initials: F
authors.lastname: Shellock
authors.forename: E
authors.initials: E
authors.lastname: Zerhouni
authors.forename: D
authors.initials: D
authors.lastname: Stark
authors.forename: E K
authors.initials: EK
authors.lastname: Outwater
authors.forename: U
authors.initials: U
authors.lastname: Schmiedl
authors.forename: L C
authors.initials: LC
authors.lastname: Kirby
authors.forename: J
authors.initials: J
authors.lastname: Chezmar
authors.forename: T
authors.initials: T
authors.lastname: Coates
authors.forename: M
authors.initials: M
authors.lastname: Chang
authors.forename: J M
authors.initials: JM
authors.lastname: Silverman
authors.forename: N
authors.initials: N
authors.lastname: Rofsky
authors.forename: K
authors.initials: K
authors.lastname: Burnett
authors.forename: J
authors.initials: J
authors.lastname: Engel
authors.forename: S W
authors.initials: SW
authors.lastname: Young
mesh_terms: D000284:Administration, Oral; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003287:Contrast Media; D005260:Female; D005682:Gadolinium / Q000008:administration & dosage; D005767:Gastrointestinal Diseases / Q000175:diagnosis*; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D008279:Magnetic Resonance Imaging / Q000295:instrumentation / Q000379:methods*; D008297:Male; D008875:Middle Aged; D012680:Sensitivity and Specificity; D018709:Statistics, Nonparametric; D017641:Zeolites / Q000008:administration & dosage*
chemical_list: D003287:Contrast Media; D017641:Zeolites; D005682:Gadolinium