Gadobenate dimeglumine-enhanced magnetic resonance angiography of the pelvic arteries.
OBJECTIVE
To evaluate 4 doses of gadobenate dimeglumine (Gd-BOPTA) for contrast-enhanced magnetic resonance angiography (CE-MRA) of the pelvic arteries and to compare CE-MRA with unenhanced time-of-flight MRA (2D-TOF-MRA).


METHODS
A multicenter Phase II dose-finding study was performed in 136 patients with Gd-BOPTA doses of 0.025, 0.05, 0.1, and 0.2 mmol/kg bodyweight. Evaluation of CE-MRA images and comparison with 2D-TOF-MRA images was performed onsite and by 2 blinded offsite reviewers in terms of subjective image quality, number of lesions detected, and confidence in lesion characterization.


RESULTS
Significant (P < 0.05) improvements over unenhanced findings were observed for CE-MRA at all dose levels. For reviewer 1 and the onsite investigators, the overall image quality increased up to a dose of 0.1 mmol/kg and then plateaued. For reviewer 2, increased image quality was noted up to a dose of 0.2 mmol/kg. Significant (P < 0.005) increases in diagnostic confidence on CE-MRA versus unenhanced MRA was observed for all dose groups by reviewer 1 and the onsite investigators and for the 0.1 and 0.2 mmol/kg dose groups by reviewer 2. No serious adverse events were recorded that were attributable to the study drug and no trends in laboratory parameters, vital signs, or electrocardiogram recordings were observed.


CONCLUSIONS
Gadobenate dimeglumine-enhanced MRA is safe and significantly more effective than unenhanced 2D-TOF-MRA for imaging the pelvic arteries. A dose of 0.1 mmol/kg appears the most appropriate dose for subsequent Phase III clinical evaluation.
Wikström
Johan
J
Department of Diagnostic Radiology, Uppsala University Hospital, Uppsala, Sweden. johan.wikstrom@radiol.uu.se
Wasser
Martin N
MN
Pattynama
Peter M T
PM
Bonomo
Lorenzo
L
Hamm
Bernd
B
Del Maschio
Alessandro
A
Knopp
Michael V
MV
Marchal
Guy
G
Barentsz
Jelle O
JO
Oudkerk
Matthijs
M
Hentrich
Hans-Rainer
HR
Daprà
Massimo
M
Kirchin
Miles A
MA
Shen
Ningyan
N
Spinazzi
Alberto
A
Ahlström
Håkan
H
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001012:Aorta, Abdominal / Q000473:pathology*; D003287:Contrast Media / Q000008:administration & dosage* / Q000009:adverse effects; D005260:Female; D005682:Gadolinium; D006801:Humans; D018810:Magnetic Resonance Angiography; D008297:Male; D008536:Meglumine / Q000031:analogs & derivatives*; D008875:Middle Aged; D009942:Organometallic Compounds; D011507:Proteinuria / Q000139:chemically induced; D012077:Renal Artery / Q000473:pathology*
D003287:Contrast Media; D009942:Organometallic Compounds; C064572:gadobenic acid; D008536:Meglumine; D005682:Gadolinium