Increasing Signal Intensity Within the Dentate Nucleus and Globus Pallidus on Unenhanced T1W Magnetic Resonance Images in Patients with Relapsing-remitting Multiple Sclerosis: Correlation with Cumulative Dose of a Macrocyclic Gadolinium-based...

Overview

Journal Eur Radiol

Specialty Radiology

Date 2015 Jun 25

PMID 26105022

Citations 90

Authors

Dragan A Stojanov

Aleksandra Aracki-Trenkic

Slobodan Vojinovic

Daniela Benedeto-Stojanov

Srdjan Ljubisavljevic

Affiliations

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Abstract

Objective: To evaluate correlation between cumulative dose of gadobutrol and signal intensity (SI) within dentate nucleus and globus pallidus on unenhanced T1-weighted images in patients with relapsing-remitting multiple sclerosis (RRMS).

Methods: Dentate nucleus-to-pons and globus pallidus-to-thalamus SI ratios, and renal and liver functions, were evaluated after multiple intravenous administrations of 0.1 mmol/kg gadobutrol at 27, 96-98, and 168 weeks. We compared SI ratios based on the number of administrations, total amount of gadobutrol administered, and time between injections.

Results: Globus pallidus-to-thalamus (p = 0.025) and dentate nucleus-to-pons (p < 0.001) SI ratios increased after multiple gadobutrol administrations, correlated with the number of administrations (ρ = 0.263, p = 0.046, respectively) and depended on the length of administration (p = 0.017, p = 0.037, respectively). Patients receiving gadobutrol at 27 weeks showed the greatest increase in both SI ratios (p = 0.006; p = 0.014, respectively, versus 96-98 weeks). GGT increased at the end of the study (p = 0.004).

Conclusion: In patients with RRMS, SI within the dentate nucleus and globus pallidus increased on unenhanced T1-weighted images after multiple gadobutrol injections. Administration of the same total amount of gadobutrol over a shorter period caused greater SI increase.

Key Points: Gadolinium deposition may occur within the human brain after multiple gadolinium contrast administrations. Increasing T1W signal intensity occurs within the dentate nucleus and globus pallidus. Increasing signal intensity may be a consequence of multiple administrations of gadobutrol. Administration of gadobutrol over a shorter period causes greater signal intensity increase.

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