Clinical trials: Contrast Agent
Amblyopia, Amblyopia, Anisometropic
Stochastic Resonance Applied to Amblyopia Training and the Plasticity of Brain
The prevalence of Taiwan's population with amblyopia is 2-5%. Amblyopia affects the daily life and learning ability. The human visual system can be developed normally with exposure of clear images on the retina, which often drive…
- Trial name
- NCT04213066
- Testing
- Portable tablet
- Volunteers
- 51 people, healthy volunteers welcome
- Sponsor
- National Cheng-Kung University Hospital
COVID 19
B Cell Responses in COVID-19
In this study, we will develop techniques to optimize the in vitro production of human monoclonal antibodies.
- Trial name
- NCT06891170
- Where
- Italy
- Volunteers
- 4 people, healthy volunteers welcome
- Sponsor
- Fondazione IRCCS Policlinico San Matteo di Pavia
Short-Term Renal-Hematologic Safety, Contrast-Enhanced MRI and FDG-PET/CT
Comparative Evaluation of Contrast-Enhanced MRI and FDG-PET/CT in Spinal Pathology: Image Quality and Short-Term Renal-Hematologic Safety
This prospective comparative observational study evaluates image quality characteristics and short-term physiological effects associated with contrast-enhanced magnetic resonance imaging (MRI) and fluorodeoxyglucose positron…
- Conditions
- Short-Term Renal-Hematologic Safety, Contrast-Enhanced MRI and FDG-PET/CT, Spinal Pathology
- Trial name
- NCT07640386
- Where
- Egypt
- Volunteers
- 120 people, healthy volunteers welcome
- Sponsor
- Cairo University
Pancreatic Adenocarcinoma
Prospective Evaluation of MRI Biomarkers in Pancreatic Ductal Adenocarcinoma
This is a prospective cohort study in participants with pancreatic adenocarcinoma who are undergoing surgical resection. Participants will have up to two magnetic resonance imaging (MRI) scans with and without intravenous…
- Trial name
- NCT02775786
- Testing
- MRIs with and without intravenous contrast (up to 2)
- Where
- United States
- Volunteers
- 47 people, healthy volunteers welcome
- Sponsor
- Columbia University
Visual Fatigue
Visual Discomfort and Reading
Reading can be an uncomfortable and difficult task for some people. Symptoms include unpleasant somatic and perceptual effects, such as eye-strain, headache, and blurred text, despite normal visual acuity.
- Trial name
- NCT00402155
- Testing
- Stress on visual discomfort
- Where
- United States
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- Southern California College of Optometry at Marshall B. Ketchum University
CSF Circulation Disorder, Foramen; Monro, Obstruction
Cerebrospinal Fluid Movements Through Interventricular Foramina in Phase Contrast Magnetic Resonance Imaging (PC-MRI)
Assess the reproductibility of PC-MRI for cerebrospinal fluid movements through the interventricular foramina on volunteer subjects.
- Conditions
- CSF Circulation Disorder, Foramen; Monro, Obstruction, Mri
- Trial name
- MLCSFIV (NCT04145414)
- Testing
- MRI
- Where
- France
- Volunteers
- 28 people, healthy volunteers welcome
- Sponsor
- Centre Hospitalier Universitaire de Besancon
Radiocontrast-induced Nephropathy
Mechanisms for the Effect of Acetylcysteine on Renal Function After Exposure to Radiographic Contrast Material
Millions of people receive radiographic contrast material for investigations like CT and coronary angiography. While considered safe in healthy patients, it can cause acute renal impairment.
- Trial name
- NCT00558142
- Testing
- Acetylcysteine, Visipaque 320
- Where
- United Kingdom
- Volunteers
- 107 people, healthy volunteers welcome
- Sponsor
- University of Edinburgh
Heart Attack
Efficacy of Non Contrast DWI(Diffusion Weighted Imaging) Imaging Compared to DMR-DE
Use of MRI and DWI to diagnose cardiac scarring after heart attack.
- Trial name
- NCT01820000
- Testing
- Diffusion Weighted Imaging with MRI scans
- Where
- United States
- Volunteers
- 23 people, healthy volunteers welcome
- Sponsor
- University of Michigan
Pulmonary Hypertension, Ventricular Function
Magnetic Resonance Imaging in the Diagnosis of Pulmonary Hypertension
The aim of the present study is to identify changes in the cardiovascular system in patients with pulmonary hypertension (PH) by magnetic resonance imaging (MRI).
- Conditions
- Pulmonary Hypertension, Ventricular Function, MR Phase Contrast Velocity Imaging, Late Enhancement Patterns
- Trial name
- NCT00575692
- Where
- Austria
- Volunteers
- 240 people, healthy volunteers welcome
- Sponsor
- Medical University of Graz
Lenses, Intraocular, Contrast Sensitivity
A Pilot Study Simulating Multifocal Intraocular Lenses in Healthy Subjects
Age related cataracts are responsible for about 51 percent of blindness worldwide and according to the WHO affect about 20 million people, according to the WH .
- Conditions
- Lenses, Intraocular, Contrast Sensitivity, Visual Acuity
- Trial name
- NCT01873781
- Testing
- Cyclopentolatehydrochloride
- Where
- Austria
- Volunteers
- 30 people, healthy volunteers welcome
- Sponsor
- Medical University of Vienna
Carbon Dioxide, Endovascular Abdominal Aortic Aneurym Repair
Prospective, Non-Randomized Evaluation of Carbon Dioxide Gas as a Contrast Agent in Comparison With Iodinated Contrast in Endovascular Aneurysm Repair
Endovascular repair of infrarenal abdominal aortic aneurysms (AAA) requires a contrast agent to identify the vascular anatomy and placement of the stent graft.
- Conditions
- Carbon Dioxide, Endovascular Abdominal Aortic Aneurym Repair, Prospective, Angiogram
- Trial name
- NCT00520416
- Testing
- Carbon dioxide angiogram
- Where
- United States
- Volunteers
- healthy volunteers welcome
- Sponsor
- University of Southern California
Brain Diseases
Multi-center Study of Artificial Intelligence Model for Gadolinium-based Contrast Agent Reduction in Brain MRI (MAGNET)
MAGNET is a multi-center and prospective study to minimize Gadolinium-based Contrast Agent (GBCA) combining novel artificial intelligence (AI) methods with pre-contrast images and/or low-dose images to synthesize virtual…
- Trial name
- MAGNET (NCT05754476)
- Testing
- Low-dose GBCA levels
- Where
- China
- Volunteers
- 3,000 people, healthy volunteers welcome
- Sponsor
- Beijing Tiantan Hospital
Visual Acuity
Evaluation of Electronic LogMar Visual Acuity and Contrast Sensitivity in a Population of Contact Lens Wearers
This is a bilateral, non-dispensing, randomized, cross-over, single-masked study. There are a total of 3 visits where all study endpoints will be measured in all subjects at baseline with habitual lenses and under the two testing…
- Trial name
- NCT03222037
- Testing
- senofilcon A, Control
- Where
- United States
- Volunteers
- 49 people, healthy volunteers welcome
- Sponsor
- Johnson & Johnson Vision Care, Inc.
Peripheral Artery Disease
Optical Imaging Measurement of Intravascular Solution Efficacy Trial
Iodinated contrast is the current gold standard for infrainguinal angiography imaging in patients without renal insufficiency and has also been used with intravascular Optical Coherence Tomography (iOCT) to improve image quality…
- Trial name
- OPTIMISE (NCT01743872)
- Testing
- Contrast Injection, Dextran Injection, CO2 Injection
- Where
- United States
- Volunteers
- 23 people, healthy volunteers welcome
- Sponsor
- University Hospitals Cleveland Medical Center
Low Vision
Obstacle Negotiation in Older People With and Without Vision Impairment
Falls are common among people with vision impairment and can lead to devastating health consequences. Understanding the functions of vision and how the visual characteristics of obstacles in the walking path impact the gait of…
- Trial name
- NCT05888441
- Testing
- Obstacle characteristics
- Where
- United States
- Volunteers
- 200 people, healthy volunteers welcome
- Sponsor
- Indiana University
Raynaud Disease, Hyperemia
PORH and Response to Cold in Raynaud's Phenomenon.
The main objective of the study is to determine if implication of epoxy-eicosatriénoïc acids (EETs) and NO during cutaneous post-occlusive hyperemia differs between patients with Raynaud phenomena and healthy volunteers, by…
- Conditions
- Raynaud Disease, Hyperemia, Cold
- Trial name
- REFRAIN (NCT02183779)
- Testing
- post-occlusive hyperemia, cooling box, L-NMMA and Fluconazole dermic injection
- Where
- France
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- University Hospital, Grenoble
Gadolinium Toxicity
In Vitro Study of the Effect of Gadolinium Contrast on Fibrocytes
Gadolinium contrast agents are frequently administered for MRI imaging. Very little is known of its toxicity outside of patients with reduced renal function.
- Trial name
- NCT02512796
- Testing
- Gadolinium contrast dye
- Where
- United States
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- University of Virginia
Myopia, Moderate
To Compare the Clinical Outcomes of FemtoLASIK and ICL Implantation in Treating Moderate Myopia Focusing on Refractive Stability, Contrast Sensitivity and High Order Aberrations.
Compare the clinical outcomes of FemtoLASIK and ICL implantation in treating moderate myopia.
- Trial name
- NCT07291986
- Testing
- FemtoLASIK, ICL implantation
- Where
- Egypt
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- Walid Osama Abdel Rahman Nour El Din
Coronary Artery Disease, Coronary Atheroscleroses
Screening Coronary Artery Disease Using artiFicial intelligencE in Non-contrast Computed Tomography
This project aims to improve direct patient care by reducing the risks of futile exposure to ionizing radiation and iodinated contrast in patients referred for coronary computed tomography angiography
- Trial name
- SAFE-CT (NCT06438393)
- Testing
- CT coronary angiography and non-contrast CT
- Where
- Portugal
- Volunteers
- 1,000 people, healthy volunteers welcome
- Sponsor
- Universidade do Porto
Renal Cell Carcinoma
Yorkshire Kidney Screening Trial
Kidney cancer is the 8th most common cancer in Yorkshire. It has a poor survival rate, with only 6 out of 10 patients diagnosed with kidney cancer still alive after 5 years.
- Trial name
- YKST (NCT05005195)
- Testing
- Low dose abdominal computed tomography scan
- Where
- United Kingdom
- Volunteers
- 5,850 people, healthy volunteers welcome
- Sponsor
- University of Leeds