73 Clinical Trials for Various Conditions
The purpose of this study is to demonstrate that the strength of agreement between single photon emission computed tomography (SPECT) imaging with regadenoson following inadequate exercise stress testing and SPECT imaging with regadenoson alone is not inferior to the strength of agreement between two sequential regadenoson SPECT images without exercise.
This is an open-label study investigating the relationship between SEP-228432 and SEP-228431 (the active metabolite of SEP-228432) plasma concentrations, SERT occupancy, and DAT occupancy, both measured by SPECT imaging.
The investigators primary objective is to acquire preliminary data on one-hundred former NFL veterans with at least one full year of professional service using brain SPECT imaging in order to assess the degree to which NFL football puts players at risk for traumatic brain injury (TBI). TBI severity shall be gauged via visual inspection by a clinician trained in neuroanatomy, and also by a statistical comparison of subjects' brains to an in-house proprietary database comprised of the brains of healthy subjects. The investigators secondary objective is to acquire additional data on these players such that investigators may establish causative factors and risks associated with said TBI. The investigators tertiary objective is to acquire data on subjects using various mental health metrics in order to determine the effects of TBI.
This protocol details a novel myocardial perfusion Single Photon Emission Computed Tomography (SPECT) protocol wherein patients receive a low-dose (6 mCi) of Tc-99m sestamibi during exercise or regadenoson pharmacologic stress and undergo a full-time SPECT acquisition processed with Wide Beam Reconstruction (WBR). Immediately thereafter patients receive a high-dose (30-35 mCi) of Tc-99m sestamibi at rest and undergo a half-time rest scan, also processed with WBR. All enrolled research subjects will undergo both the initial stress and subsequent rest scan. The radiation exposure associated with this new stress/rest protocol is equivalent to that of the conventional rest/stress protocol presently in routine clinical uses at SLRHC. Eventually, when and if this novel stress/rest protocol is adopted in routine clinical practice, patients with normal stress scans would receive only 6 mCi of Tc-99m sestamibi (331 mSv in men, 241 mSv in women) and spend only approximately one hour in the Nuclear Medicine Laboratory. All patients presenting to the Nuclear Medicine Laboratory for evaluation of known or suspected coronary artery disease will be candidates for enrollment. Fifty patients undergoing treadmill exercise stress and 50 patients undergoing regadenoson pharmacologic stress will be enrolled. Pregnant and breast-feeding patients will not be eligible.
The purpose of this study is to compare Multidetector Computed Tomography (MDCT) and Single Photon Emission Computed Tomography (SPECT) stress myocardial perfusion imaging (MPI) with regadenoson in order to detect the presence or absence of reversible defects.
The objective of the study is to acquire a database of Single Photon Emission Computed Tomographic (SPECT) studies of the brains of normal human subjects in resting and concentrating states. The database will provide a basis for subsequent investigation of meaningful brain differences between clinical and normal subject groups
Many stress tests being done today have two parts, the stress test and the pictures of your heart. The investigators are comparing a newer technique to obtain the pictures (PET imaging) to the standard method (SPECT imaging). However, it is not known if the new test is better than the old test. It is important to have a standard to compare these tests to, and that is why people who will be getting a cardiac catheterization are being asked to participate. The information about your arteries from the cardiac catheterization will be used to judge which stress test is better. The investigators hypothesize that the newer method (PET imaging) will be more accurate than the old method (SPECT) in detecting heart disease.
This study is for people who have a SPECT scan (nuclear imaging of the blood flow to the heart muscle) ordered by their medical doctors. As part of the SPECT scan, they will have been given a drug called regadenoson to widen and expand the blood vessels bringing blood to the heart muscle. The SPECT pictures of the heart are taken about an hour after the regadenoson is put into an arm vein through an IV. In this study, additional echo pictures will be taken and compared to the SPECT pictures. The aim of the study is to see if the echo pictures work as well as SPECT to measure the blood flow to the heart muscle.
The purpose of this study is to compare pharmacologic stress myocardial perfusion PET with pharmacologic stress myocardial perfusion SPECT in a near-simultaneous, head-to-head comparison in the same patient. The investigators hypothesize that pharmacologic stress myocardial perfusion PET will prove superior to pharmacologic stress myocardial perfusion SPECT as a first-line diagnostic test for higher-risk patients with known coronary artery disease (CAD) who present with symptoms consistent with possible worsening of their CAD.
Researchers hope that this new non-invasive multi-detector scanner (DSCT) will provide diagnostic information comparable to the combination of traditional SPECT (for function and blood flow) and CT imaging (for a precise anatomical view).
The main objectives of this proposal are as follows: * To assess the dynamic uptake and washout of 123-I MNI-388 and MNI 390, a potential imaging biomarker for β-amyloid burden in brain, using single photon emission computed tomography (SPECT) in similarly aged Alzheimer's (AD) subjects and healthy controls * To perform blood metabolite characterization of 123-I MNI-388 and MNI-390 in healthy and AD subjects to determine the metabolic fate and nature of metabolites in assessment of 123-I MNI-388 and MNI 390 as a single photon computed tomography (SPECT) brain imaging agent
Observe whether the administration of caffeine prior to regadenoson will affect the interpretation of test results in subjects with coronary artery disease (CAD) undergoing SPECT MPI
RATIONALE: Diagnostic procedures, such as single-photon emission computed tomography and computed tomography lymphoscintigraphy, may help lower the dose of radiation therapy after surgery, and help prevent lymphedema. PURPOSE: This clinical trial is studying single-photon emission computed tomography and computed tomography lymphoscintigraphy followed by intensity-modulated radiation therapy to see how well they work in treating patients who have undergone surgery for stage I or stage II breast cancer.
The purpose of this study is to compare the MRI results with the new SPECT image reconstruction method, this study will allow us to determine whether a new more accurate method of looking at the heart by nuclear study can be used in routine clinical use.
The purpose of this study is to determine if the planning of radiation treatment of prostate cancer patient can be made more precise by comparing currently planning techniques to an imaging technique called SPECT.
This study will use single photon emission computed tomography, or SPECT (see below), to examine brain nicotine receptors in evaluating the role of a chemical called acetylcholine in memory and other problems in Parkinson's disease (PD). Acetylcholine acts by binding to these nicotine receptors. Healthy normal volunteers and patients with Parkinson's disease 40 years of age and older, with or without dementia, may be eligible for this study. Candidates will be screened with physical and neurological examinations, a pen and paper test of memory and other mental functions, blood tests, and, for women of childbearing potential, a pregnancy test. Patients with cognition problems will have more intensive mental function tests. All participants will undergo the following procedures: * Magnetic resonance imaging (MRI): This test uses a strong magnetic field and radio waves to show structural and chemical changes in the brain. During the scan, the subject lies on a table in a narrow cylinder (the scanner). The time required in the scanner is about 1 hour, during which the subject is asked to lie very still for 10 to 15 minutes at a time. He or she can speak with a staff member via an intercom system at all times during the procedure. * SPECT: This nuclear medicine test produces a picture of the receptors in the brain. On the night before the scan, the day of the scan, and for 4 days after the scan, subjects take an oral dose of potassium iodide to protect the thyroid gland from the radioactive tracer used in the SPECT procedure. (People allergic to potassium iodide will take potassium perchlorate instead.) Before the scan, small radioactive markers containing 99Tc are glued to the subject's head. Two catheters (thin, flexible tubes) are placed in veins in the arms to inject the radioactive tracer \[123I\]5-I-A-85380 and to draw blood samples. Another catheter is placed in an artery in the wrist to draw arterial blood samples. During the scan, the subject lies on a bed with his or her head held still with a head holder. The scans are taken over a 6-hour period after injection of \[123I\]5-I-A-85380. An electrocardiogram, respiration, and blood pressure measures are taken before the tracer is injected, then 5 minutes after the injection, and again 30 to 60 minutes after the injection. Blood and urine samples are collected 5 to 6 hours after starting the scan. Participants are asked to urinate at least every 2 hours for 12 hours after injection of \[123I\]5-I-A-85380 to decrease radiation exposure.
This study will use single photon emission computed tomography (SPECT) to determine what areas of the brain are responsible for paroxysmal hyperkinetic movement disorders. Patients with these disorders have sudden, brief attacks of movement, similar to epileptic seizures, but without loss of consciousness. SPECT is a nuclear medicine test that produces three-dimensional images of the brain, showing blood flow and function in different brain regions. This test, which can detect the focus of epileptic seizures, will be used in this study to scan patients while they are experiencing a hyperkinetic movement attack, while they are not having and attack, and while they are simulating an attack. Patients 18 years of age and older who have paroxysmal movement attacks that can be easily induced by a specific trigger, such as a sudden movement or prolonged exercise, may be eligible for this study. Candidates will be screened with a medical history and review of their medical records, physical examination, videotape of attacks, and, for women, a pregnancy test. Participants will have three SPECT scans, separated from each other by at least 48 hours. Before each scan, the subject will perform an activity that ordinarily precipitates a movement attack, such as standing up from a chair, assuming a certain posture, or doing something strenuous. Each scan will try to record one of the following conditions: * The subject performs the trigger activity, but does not have an attack; * The subject performs the trigger activity and has an involuntary attack as a result; * The subject performs the trigger activity and does not have an attack, but then mimics an attack voluntarily. After the condition is recorded, the subject will be given an injection of a radioactive agent called 99m Technetium and will then relax quietly for 40 to 60 minutes before the SPECT scan. For the scan, the subject lies on an examination table and the SPECT camera is moved near and around the head to image the brain. The scan takes about 40 minutes. Participants will also undergo one magnetic resonance imaging (MRI) scan. For this test, the subject lies in a narrow cylinder (the scanner), while pictures of the brain are taken. Earplugs are worn to muffle loud noises caused by electrical switching of radio frequency circuits used in the scanning process. The procedure takes about 30 minutes.
The purpose of this study is to find if the Single Photon Emission Computed Tomography (SPECT) scan is as effective as a liver biopsy (using a special needle to remove tissue from the liver) in examining liver damage in patients with HIV and hepatitis C virus (HCV). A standard way to examine the liver for disease has been to perform a liver biopsy. The SPECT scan, which takes a picture of the liver, has been found to be effective in determining liver damage but studies need to be done in patients with hepatitis. This study will compare the effectiveness of the liver biopsy and SPECT scan in determining liver disease in patients with HIV and HCV. The SPECT scan might be a good replacement for the liver biopsy if it is found to be as good as or better than liver biopsies.
This study will determine how breathing motions may affect positron emission tomography (PET) scans. It has been discovered that the quality of PET scans varies according to which part of the breathing cycle patients hold their breath. NIH Clinical Center patients 12 years of age and older who are scheduled to have PET and computed tomography (CT) scans as part of their standard medical care may be eligible for this study. Participants have their scheduled PET or CT scan as they normally would and are asked to hold their breath after breathing out, as is usual. In addition, for this study, patients are also asked hold their breath after breathing in and again at a point between breathing in and out. Each breath-hold is for around 15 seconds. The scans for each of the three different breath-holds are examined for differences. Some patients may also be asked to breathe through a tube called a pneumotachometer, or spirometer, to determine their normal breathing pattern. This involves breathing through a mouthpiece similar to a snorkel mouthpiece and takes about 2 minutes.
The purpose of this Expanded Access Program (EAP) is to allow use of the investigational therapeutic agent, MNPR-101-PCTA-177Lu, for treatment of urokinase plasminogen activator receptor (uPAR)-positive solid tumors identified via positron emission tomography / computed tomography (PET/CT) with investigational imaging agent MNPR-101-DFO\*-89Zr.
This is a first in man study to determine if \[203Pb\]VMT-α-NET identifies neuroendocrine tumors with SPECT/CT. This is the first step to testing \[212Pb\]-based alpha radiation therapy in neuroendocrine therapy.
The study hypothesis is that new imaging agents \[203Pb\]VMT01 and \[68Ga\]VMT02 can be safely used in humans without independent biological effect and can be used to image melanoma tumors expressing the melanocortin sub-type 1 receptor (MC1R) by SPECT/CT and PET/CT imaging modalities respectively.
The aim of this clinical study is to 1) establish a healthy database for nuclear perfusion imaging of the lower extremities and 2) assess the prognostic value of radiotracer-based perfusion imaging for predicting clinical outcomes in patients with peripheral artery disease (PAD) who are undergoing lower extremity revascularization procedures. We hypothesize that radiotracer imaging of the lower extremities will provide a sensitive non-invasive imaging tool for quantifying regional abnormalities in skeletal muscle perfusion and evaluating responses to medical treatment.
This is a Phase 3, prospective, open-label, international, multicentre study of Flurpiridaz (18F) Injection for PET MPI in patients referred for ICA because of suspected CAD.
This study will test the hypothesis that the anti-gravity treadmill can be safely used in stress nuclear myocardial perfusion imaging in patients unable to perform conventional treadmill exercise. This will be foundational evidence on which to consider a larger clinical trial to show that the anti-gravity treadmill improves diagnostic specificity across all cardiovascular stress testing modalities including treadmill-alone, exercise stress echocardiogram, exercise SPECT as well as having implications for cardiac PET and MRI in the future.
Parkinson's disease (PD) is a neurodegenerative disorder of unknown cause that affects more than a million Americans. It's most prominent pathology is the degeneration of dopaminergic neurons in the brain. It is believed that oxidative stress and inflammation play an important role in the pathophysiology of Parkinson's disease as well. The object of this study is to evaluate whether nutritional supplementation with compounds that have been shown to have either anti- inflammatory, or antioxidant effects, might support brain function in patients with Parkinson's disease, particularly in regards to the dopamine system. Enrolled patients will be randomly assigned to receive oral and intravenous n-acetyl cysteine (NAC), or standard PD care. This study will utilize Ioflupane (DaTscan) single photon emission computed tomography (SPECT) to measure dopamine function, magnetic resonance spectroscopy (MRS) to measure inflammatory and oxidative stress markers, and neurological measures to assess clinical symptoms, in patients with PD. Subjects will receive a DaTSCAN and MRS initially and after completing the supplement or NAC regimen.
Over 2 decades scientists have been studying the effect on brain function from meditation practices. The purpose of this study is to measure the effect of a meditation retreat program on serotonin and dopamine transporter binding and changes in cerebral blood flow. The retreat program that will be followed is a week-long retreat called the Ignatian Retreat.
The investigators propose a 4 year prospective, observational study of 40 patients yearly, comparing conventional clinically indicated SPECT and PET perfusion with dynamic rest/stress MPI studies with coronary angiography, in some cases performed with quantitative coronary anatomy and flow as well as quantitative 13N-ammonia PET MPI. Methods will also be assessed for their ability to determine myocardial viability by comparing regional wall motion (WM) on clinically indicated serial ventriculography, echocardiography or gated SPECT MPI in those protocol patients with WM abnormalities who subsequently undergo revascularization. Patient studies will begin in the first study year based on those methods already developed and integrate new advances as they become evident.
This study is recruiting patients already scheduled for a single photon emission computed tomography myocardial perfusion imaging (SPECT-MPI) test. SPECT-MPI is a nuclear imaging technique that uses a radioactive substance, or radiotracer, and special equipment to create three-dimensional (3D) images of the heart. Radiotracer is a radioactive dye that will make the structures of the heart visible and is routinely used to view blood flow in the heart, scan for damaged heart tissue, or assess heart function. For a routine SPECT-MPI test, the radiotracer is given in one dose at the beginning of the test, followed by taking resting images of the heart. For this study, researchers would like to administer half of the radiotracer, obtain resting images, administer the remainder of the radiotracer and obtain a second set of resting images. Participants will receive the same amount of radioactive material that would normally be given for this test; however, it will be administered in two half-doses. Participation in this study will add about 30 minutes to the time it takes to complete the routine test. The investigators expect to enroll about 160 subjects in this study at Northwestern.
The goal of this clinical research study is to learn if adding Zevalin (ibritumomab tiuxetan) to low-intensity chemotherapy (the combination of rituximab, bendamustine, and fludarabine), followed by an allogeneic stem cell transplant, can help to control lymphoma. The safety of this combination will also be studied. Two (2) forms of ibritumomab tiuxetan will be used in this study. 90Y-ibritumomab tiuxetan is designed to attach to lymphoma cells and destroy the cells using a radioactive particle that is attached to it. 111In-ibritumomab tiuxetan is like 90Y- ibritumomab tiuxetan, but the radioactive particle that is attached to it does not kill lymphoma cells. The radioactive particle makes the drug able to be seen inside your body. It is being used in this study to predict how fast the study drug will travel in the body and how long the drug stays in the body. Rituximab is designed to attach to lymphoma cells, which may cause them to die. Bendamustine is designed to damage and destroy the DNA (genetic material) of cancer cells. Fludarabine is designed to make cancer cells less able to repair damaged DNA. This may increase the likelihood of the cells dying.