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14,722 results for “contrast agents”

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Comparison of Contrast Agents During CT Angiography

513 participants · First posted Feb 17, 2012

Gadolinium-Based-Contrast-Agents (GBCA) Enhancement During MR Urography

500 participants · First posted Apr 10, 2019

Negative Oral Contrast Agents Utilization in PET/CT Studies

150 participants · First posted Oct 8, 2020

GREENWATER 2.0: Reducing Iodinated Contrast Agents in Hospital Wastewater

416 participants · First posted Jun 2, 2026

Iodinated Contrast Agents and Risk of Hypothyroidism in Young Children in the United States

2,320 participants · First posted Nov 9, 2016

Observational Study on Hypothyroidism in Young Children Following Iodine Contrast Exposure

843 participants · First posted May 9, 2016

Active, not recruiting

Evaluation of Gadolinium Based Contrast Agents for Portable MR Imaging Systems

85 participants · First posted Dec 22, 2025

Iso-Osmolar vs. Low-Osmolar Contrast Agents for Optical Coherence Tomography

62 participants · First posted Oct 1, 2021

Comparison of VoLumen and Breeza Oral Contrast Agents in Pediatric Patients

66 participants · First posted Oct 27, 2016

Kinetics of Urinary Excretion of Gadolinium Contrast Agents Used in MRI Examinations

60 participants · First posted Jan 5, 2024

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