8 Clinical Trials for Various Conditions
Collection of data from different sites regardless of whether they use standard or tailored protocols for the application of high concentration iodinated contrast agents to assess if the individually patient-adapted protocols result in a similar diagnostic image quality.
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.
Demonstrate the ability of muti-detector computed tomography to adequately perform stress testing will result in a veritable "one-stop shop" of non-invasive cardiac imaging that is, the ability to directly visualize heart arteries with high accuracy and to simultaniously determine the hemodynamic significance of any blockages visualized.
One-lung ventilation (OLV) is used for thoracic surgical procedures to facilitate surgical exposure. Lung isolation is performed using a double-lumen endotracheal tube (DLT) and optimal position is achieved with the use of fiberoptic bronchoscopy. The most common technique used to place a left-sided DLT is the blind method technique, which consists of direct laryngoscopy and rotation of the DLT into the trachea with the aim to intubate the entrance of the left main bronchus. The DLT will be rotated counterclockwise blindly after the tip of the DLT passes the vocal cords under direct laryngoscopy. However, in some occasions, the tip of the DLT migrates into the right bronchus because the alignment between the trachea and right bronchus is more vertical. The identification of the misplacement can be challenging, which could lead to the failure of lung isolation. In order to avoid the unsuccessful lung isolation, Investigators are interested in identifying the factors that potentially influence the incorrect tube DLT placement diverting into the opposite bronchus.
The investigators' overarching goal is to investigate whether use of an augmented reality display system (utilized in addition to, not as a replacement to, conventional CT and MRI displays currently available in the procedure suite) streamlines the process of a procedure and/or provides ease of access to helpful pre-procedure and intra-procedure imaging information that would be more difficult and time-consuming to obtain with the conventional imaging display systems.
Coronary calcium hampers accurate evaluation of the coronary arteries with coronary computed tomography angiography (CCTA). A novel approach to potentially overcome this limitation is coronary calcium subtraction. The primary hypothesis of the study is: - Coronary calcium subtraction CCTA will improve diagnostic accuracy as compared to conventional CCTA on a per-patient basis
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 investigators propose a novel technique using dual source multidetector computed tomography (DSCT) where information on both coronary anatomy and myocardial perfusion is obtained in a single scan. The investigators hypothesize that a coronary CTA protocol can be devised to obtain resting myocardial perfusion, myocardial perfusion after stress, and coronary anatomy. Hence, one diagnostic test will be able to detect the presence of coronary plaque as well as assess the functional significance of a stenosis.