90 Clinical Trials for Various Conditions
This study is a postmarketing requirement jointly carried out by four NDA holders (Bayer AG, Bracco, GE Healthcare and Guerbet) and the CRO IQVIA. The study aims to create detailed images of the organs and tissue of the human body during x-ray, CT-scan or MRI investigations, doctors are using contrast media (a kind of dye) which can be given to patients by injection into a blood vessel or by mouth. In this study researchers want to find out whether so called gadolinium-based contrast agents (GBCAs) have an effect on body movement and mental skills when given to participants multiple times within 5 years. The study plans to enroll about 2076 participants suffering from a condition for which they are likely to have at least annually a MRI or another imaging examinations. Only adults up to 65 years will be considered to join this study. During the study duration of 5 years participants will receive annually a MRI or other imaging tests (such as CT-scan, x-ray) and will visit the study doctor at least 7 times for physical examinations, laboratory investigations and tests on body movement and mental skills.
The purpose of this study is to compare contrast agents, Dotarem or MultiHance. The study will test to see how much of these two contrast agents are deposited in the bones or tissues of pediatric patients. The patients receiving contrast will then be compared against pediatric patients who have not received any contrast prior to cardiac surgeries.
Purpose: There are two goals we have for this prospective single arm study; to see an increase in the amount of gadolinium in 24 hour urine collection following each infusion treatment with Calcium and Zinc DTPA, and to see a reduction or elimination of gadolinium deposition disease (GDD) symptoms. Participants: Twenty (20) patients who are suffering from gadolinium deposition disease (GDD) Procedures: Over a series of three (3) treatment time-points patients will be treated with IV Ca-DTPA on day one, and Zn-DTPA on day two.
The researchers propose to investigate the prevalence of gadolinium in the urine of patients with a prior gadolinium-enhanced MRI before and after a edetate calcium disodium challenge. Moreover, will investigate if there is any correlation of gadolinium urine levels with levels of endogenous (e.g zinc) and xenobiotic metals.
The study will investigate patients with clinical suspicion for pulmonary embolism (PE) who have a contraindication to iodine based contrast. These patients normally get investigated with studies such as ultrasound and nuclear medicine studies but the fastest and preferred investigation is CT with contrast to look for filling defects in the pulmonary arteries. The investigators will assess whether gadolinium, which is currently used with MRI can be used with CT as an alternative effective contrast in diagnosis or exclusion of PE. A new type of CT scanner, a Dual Energy Scanner will be used to improve the visibility of Gadolinium contrast on CT.
The main objective was to prospectively explore the potential for long-term retention of Gadolinium (Gd) in bones in patients who have received a single dose of Gadolinium-based contrast agents (GBCA) or multiple doses of the same GBCA, with moderate or severe renal impairment or stable normal renal function (eGFR \> 60 ml/min/1.73 m2) at the time of GBCA injection.
This study is aimed at describing the degree of benefit, if any, and the adverse effects, if any, from receiving 5 or more treatment sessions of Gadolinium Deposition Disease using two-day chelation treatment with the chelating agents Calcium Diethylenetriamine pentaacetate (Ca-DTPA) and Zinc Diethylenetriamine pentaacetate (Zn-DTPA).
The study aims at gathering additional data on the safety and effectiveness of using intravenous administration of the drugs Ca-DTPA/Zn-DTPA to remove the heavy metal gadolinium from the bodies of patients who have retained it and developed symptoms of Gadolinium Deposition Disease following an MRI in which a gadolinium-containing contrast agent was utilized. The outcome data will include measures of symptom relief after as many as six paired Calcium-DTPA/Zinc-DTPA chelation treatments. The study also aims at gathering additional data before and after DTPA treatment regarding levels of certain cytokines in the patients' blood that have been reported to be abnormally elevated in patients with retained gadolinium.
In this research study the investigators want to learn more about how well the investigators can visualize scar tissue in the heart by MRI. In patients with congenital heart disease who need a procedure in the electrophysiology laboratory, how the MRI findings match the findings in the electrophysiology laboratory is not known. This study works to answer these questions. Participants will undergo a cardiac MRI as part of the routine clinical care that was ordered by their doctors and additional imaging by cardiac MRI will be performed.
The purpose of this research is to develop machine learning algorithms to analyze images from brain MRI to confirm that contrast agent has been correctly administered.
Researchers in this study want to learn how a new contrast agent for magnetic resonance imaging (MRI) called BAY1747846 moves into, through and out of the body (pharmacokinetics) after injection in participants with normal and impaired renal function. Impaired renal function is a condition where the kidneys do not work as well as they should. BAY1747846 belongs to the class gadolinium-based contrast agents (GBCAs). The way the body removes GBCAs including BAY1747846 from the blood is through the kidneys. So, when the kidneys are not working normally, it takes longer to remove BAY1747846 out of the body. The participants in this study will either have normal renal function, or will have mild or moderate impaired renal function. The participants will receive BAY1747846 one time through a needle into a vein. During the study, the participants will visit the study site about 6 times. The participants will stay at the study site for up to 9 days. Each participant will be in the study for up to 7 months. During the study, the doctors will: * check the participants' overall health * take blood and urine samples * ask the participants about what medications they are taking and what adverse events they are having An adverse event is any medical problem that a participant has during a study. Doctors keep track of all adverse events that happen in studies, even if they do not think the adverse events might be related to the study treatments.
The purpose of this study is to determine whether AGuIX (Activation and Guidance of Irradiation by X-ray) gadolinium-based nanoparticles make radiation work more effectively in the treatment of patients with brain metastases that are more difficult to control with stereotactic radiation alone.
Researchers in this study want to find the appropriate dose of drug BAY1747846 for adults undergoing MRI for known or highly suspected brain and/or spinal cord conditions so that the image quality is similar to that of drug gadobutrol for adults undergoing MRI. MRI stands for Magnetic resonance imaging which produces body pictures created by using magnetic energy rather than x-ray energy. Both BAY1747846 and gadobutrol are medicinal products known as gadolinium-based contrast agents (GBCA) which are used in MRI examinations to provide contrast enhancement and improve imaging performance. Gadobutrol (brand name: Gadavist, Gadovist) has been approved worldwide for the diagnosis of various disorders in adult and pediatric patients. BAY1747846 is a new GBCA under development with the goal to provide similar imaging performances in MRI. Participants in this study will receive both BAY1747846 and gadobutrol with a period of 3 - 14 days in between. A MRI examination will be performed after each injection. Participant will stay in this study for 2 - 4 weeks depending on the scheduling of the visits.
This study compares gadolinium contrast-enhanced Abbreviated MRI (AMRI) to standard ultrasound for Hepatocellular Carcinoma (HCC) screening and surveillance in subjects with liver cirrhosis.
Rationale: Dotarem provides superior enhancement characteristics compared to other GBCA in fMRU Specific Aims: Compare enhancement characteristics of Dotarem to other GBCAs in the kidneys used in fMRU Primary Objectives: Review functional analysis curves and data of fMRU studies and determine enhancement characteristics in the kidneys of the three GBCAs (Dotarem, Gadovist, Magnevist)
This phase II trial studies how well gadolinium and ferumoxytol magnetic resonance imaging (MRI) work in diagnosing patients with abnormalities in the central nervous system. Diagnostic procedures, such as gadolinium and ferumoxytol MRI, may help find and diagnose abnormalities in the central nervous system.
This is a prospective trial investigating the effectiveness of a modified MRI preparatory pulse sequence to improve pulmonary vein isolation visualization.
* The purpose of this study is to show that the novel TRAMINER (T(Rho) and Magnetization Transfer and Inversion Recovery) sequence provides at least as good visualization and detection of sub-endocardial scarring, fibrosis, and acute infarction as the current gold standard Inversion Recovery (IR) Turbo-Flash sequence. * The hypothesis is that the TRAMINER sequence has the same or higher sensitivity in detecting small sub-endocardial scarring than the inversion recovery segmented gradient echo sequence known as IR-Turbo Fast low angle shot (IR Turbo-Flash), which is the accepted current gold standard for the detection of myocardial viability.
Gadolinium contrast agents are frequently administered for MRI imaging. Very little is known of its toxicity outside of patients with reduced renal function.
The purpose of this research study is to see if magnetic resonance imaging (MRI) with a double dose of contrast, or dye, and delayed imaging with MRI can help to diagnose Meniere Disease.
This study will analyze injectate dispersal patterns after standard-of-care cervical epidural steroid injections using gadolinium as a marker and magnetic resonance imaging (MRI) to characterize the pattern. Although these procedures are performed with high frequency under the assumption that injectate remains localized to injection site, no peer-reviewed studies have validated this assumption. Comprehensive characterization of injectate dispersal patterns will provide important data regarding safety, as well as diagnostic and therapeutic potential of cervical epidural steroid injections.
Patients with an allergy to iodine based intravenous contrast cannot undergo a CT scan with contrast, unless they are premedicated. Premedication can result in a delay in diagnosis, that can be significant with acute conditions such as Pulmonary embolism. The investigators are evaluating the use of Gadolinium as an alternative contrast agent in CT. Gadolinium has been used extensively in MRI exams but the dose that is used is not sufficient to provide good enhancement on CT. Dual Energy CT is a new technology that has better sensitivity to lower doses of intravenous contrast and the investigators aim to study its effectiveness in improving the enhancement with Gadolinium. The investigators will compare enhancement of Iodine with enhancement of Gadolinium during Dual Energy CT, to assess the possibility that Gadolinium could be used as an alternative for patients who are suspected of having Pulmonary embolism. They will recruit up to 50 patients who are having a routine Chest CT during treatment for a malignancy and administer Gadolinium contrast and Iodine contrast during a chest CT exam. The enhancement with the two agents can be compared.
The objectives of this study are to evaluate the efficacy and safety of the Zevalin regimen compared to Zevalin and motexafin gadolinium in patients with rituximab-refractory, low-grade or follicular Non-Hodgkin's Lymphoma (NHL). Effectiveness of the experimental regimen assessed by complete response rate within 6 months of study entry (primary endpoint), complete response rate within 3 months of study entry, and overall response rate within 6 month of study entry.
The primary objective of this study is to determine any causative or associated factors for the development of Nephrogenic Systemic Fibrosis (NSF), Nephrogenic Fibrosing Dermopathy (NFD), or related diagnosis. Our primary focus will be on the previous administration of gadolinium to these patients, but we will also look at other postulated causes and risk factors. The secondary objective of this study is to assess tissue gadolinium (Gd) levels in five groups of subjects: * Those affected by NSF. * Those with normal kidney function who have undergone a medical imaging procedure using Gd-based contrast agent (GBCA) in the 2 years prior to a skin biopsy. * Those with normal kidney function who have never been exposed to GBCA and have had a skin biopsy. * Those on dialysis or with eGFR ≤ 30 ml/min/1.73 m2 who have had a medical imaging procedure using GBCA in the 2 years prior to skin biopsy. * Those on dialysis or with eGFR ≤ 30 ml/min/1.73 m2 who have never been exposed to GBCA and have had skin biopsy. We hypothesize that there is a correlation between the administration of Gd-containing agents usually associated with MRI procedures and the development of NSF in those with renal failure and some other predisposing condition. We also hypothesize that tissue Gd levels in those with NSF will be higher than in those who have been exposed to GBCA but do not have NSF. Of the two groups without NSF but with exposure to GBCA, we hypothesize that those with kidney dysfunction will have higher tissue Gd levels than those with normal kidney function. We hypothesize that in the two groups of subjects without exposure to GBCA, there will be no detectable levels of Gd, regardless of kidney function status.
This clinical trial studies dynamic susceptibility-weighted contrast enhanced magnetic resonance imaging (DSC-MRI) after administration of ferumoxytol and dynamic contrast-enhanced MRI (DCE-MRI) after administration of a gadolinium-based contrast agent (GBCA) in viewing the vessels of the brain in younger patients with brain tumors. Ferumoxytol is an experimental form of very small iron particles that are taken by the blood stream to cells adjacent and inside the tumor. These iron particles may make it easier to see the areas of the brain that are affected by tumor. Ferumoxytol may work better than standard GBCA in viewing the vessels of the brain and brain tumor on MRI. Using ferumoxytol and GBCA in the same MRI session may provide more information about tumor blood supply and the extent of the tumor.
The objective of this long term study is to prospectively evaluate the incidence of NSF in patients with severe CKD or kidney failure including patients undergoing dialysis (stages 4 and 5 i.e., with an eGFR below 30)who have not had exposure to a GBCA within 10 years prior to enrollment.
This phase II trial studies how well magnetic resonance imaging (MRI) using contrast imaging agent ferumoxytol works in comparison to standard imaging agent gadolinium in measuring tumors in patients undergoing treatment for brain tumors or other tumors that have spread to the brain. Diagnostic procedures, such as MRI, may help find and diagnose disease and find out how far the disease has spread. MRI scans use radio waves and a powerful magnet linked to a computer to create detailed pictures of areas inside the body. The contrast imaging agent ferumoxytol consists of small iron particles taken by the blood stream to the brain and to the area of the tumor. It is highly visible on the MRI, and may help visualize the blood flow going through the tumor better than gadolinium can. Using a more sensitive and faster 7 Tesla (7T) magnet MRI in conjunction with a contrast imaging agent may provide a better way to measure tumors than the 3 Tesla (3T) magnet MRI in patients with brain tumors.
This phase II trial is studying how well giving motexafin gadolinium together with radiation therapy works in treating young patients with pontine glioma. Radiation therapy uses high-energy x-rays to kill tumor cells. Drugs, such as motexafin gadolinium, may make tumor cells more sensitive to radiation therapy. Giving motexafin gadolinium together with radiation therapy may kill more tumor cells.
The purpose of this study is to determine if the addition of motexafin gadolinium (study drug) to standard treatment with docetaxel will improve the response rate in patients with non-small cell lung cancer.
The goals of this study are: * to determine if the combination of two drugs, motexafin gadolinium and pemetrexed, may be an effective treatment for patients with non-small cell lung cancer (NSCLC) who have had one previous chemotherapy regimen that included a platinum containing drug such as cisplatin or carboplatin. * to assess response to treatment in patients with NSCLC six months after beginning study treatment.