View clinical trials related to Radiation Exposure.
Filter by:This project aims to evaluate the impact of the introduction of an automated system for radiopharmaceutical preparation and administration on the radiation safety of the radiographers working in nuclear medicine. This study will help to fill the existing gap in the scientific literature and provide useful guidance for the selection of the safest and most effective automated infusion system.
Evaluation of ultra low dose protocols and Iomeron 400 contrast in PCD-CT
The purpose of this study is to examine the impact of the RADPAD in proximal operators in a contemporary cardiac catheterization laboratory (CCL), during diagnostic, coronary and structural cardiac catheterization procedures, in a large prospective, randomized controlled trial. Up to 1,000 patient-cases and up to 100 proximal operator-subjects expected to be enrolled across 1 site. The proximal operator cohort is expected to include a few interventional cardiologist attending physicians, interventional cardiology fellows, cardiovascular disease fellows and physician assistants performing multiple cases each, which in total would amount to 1,000 cases performed by 100 proximal operators. The primary outcome of interest was relative exposure of the proximal operator between the guideline directed radiation protocols and RADPAD use vs. guideline directed radiation protocols alone.
Rational: The first choice of imaging modality for patients with a suspicion of pulmonary embolism is CT pulmonary angiography (CTPA). Our goal is to avoid extra cases of cancer due to the carcinogenic effect of ionizing radiation from using CTPA. This carcinogenic effect is greatest in women under 40. In the Netherlands, at least 100,000 CTPA's are performed each year, 10% of which are in women under 40 years old, resulting in at least 10 extra tumors induced per year. The goal is to investigate whether MR Pulmonary angiography (MRPA) can serve as an alternative to CTPA. If it can replace CTPA, this will result in a significant health benefit. Objective: the primary objective is to determine the sensitivity and specificity of MR Pulmonary Angiography (MRPA) with CT Pulmonary Angiography (CTPA) as the gold standard. Secondary outcomes: to determine the clinical applicability of MRPA in daily practice, negative predictive value, positive predictive value, accuracy of MRPA (compared to CTPA), and agreement in assessment between radiologists. Study design: observational-prospective diagnostic study, an additional MRPA will be performed in patients with a suspicion of pulmonary embolism. Study population: in patients with clinical suspicion of pulmonary embolism, a standard CTPA is made for exclusion or confirmation of the disease. The study population will consist of 272 patients. Primary outcome parameters: determining the sensitivity and specificity of MRPA compared to CTPA (gold standard) in patients with a (clinical) suspicion of pulmonary embolism. Secondary outcome parameters: Determining the negative predictive value, positive predictive value, accuracy, inter-observer agreement with respect to MRPA, and applicability in daily clinical practice.
Several studies have shown that operator exposure via left transradial catheterization has yielded less operator exposure compared to standard right transradial procedure. However, in light of new data, the investigators hypothesize a hyperadducted right arm during right transradial cardiac catheterization will yield comparable, or the same operator radiation exposure.
A deep learning-based de-noising (DLD) reconstruction algorithm (ClariCT.AI) has the potential to reduce image noise and improve image quality. This capability of the CliriCT.AI program might enable dose reduction for contrast-enhanced liver CT examination. In this prospective multicenter study, whether the ClariCT.AI program can reduce the noise level of low-dose contrast-enhanced liver CT (LDCT) data and therefore, can provide comparable image quality to the standard dose of contrast-enhanced liver CT (SDCT) images will be evaluated. The aim of this study is to compare image quality and diagnostic capability in detecting malignant tumors of LDCT with DLD to those of SDCT with MBIR using the predefined non-inferiority margin.
18F-LY3950321 (also known as 18F-MNI-1256) is a radiolabeled positron emission tomography (PET) tracer targeting granzyme B. The overall goal of this protocol is to evaluate the safety, tolerability, and radiation dosimetry of 18F-LY3950321.
The purpose of this study is to show that the radiation exposure of the left distal radial artery approach is superior to the conventional right radial artery approach in terms of less radiation exposure.
Radiographical images in Adolescent idiopathic scoliosis (AIS) can have a potential radiation-induced oncogenic effect. In this study, the investigators aim to compare a fluoroscopic imaging technique (LFT) with traditional radiographs for scoliosis (ORT), to see if LFT is adequate for clinical evaluation of AIS and having a lower radiation dose. Method Image quality will evaluated for LTF and ORT of phantom images and images from 3D printed models of AIS. The investigators will measure primary physical characteristics of noise, contrast, spatial resolution, SNR, and CNR. Three independent raters will evaluate the images by observer-based methods of ICS and VGAS. Radiation doses will be evaluated by DAP measurements. Two raters will perform measurements of 6 radiographic parameters for the LFT images of AIS
Radius distal end fractures are common orthopedic injuries. Many methods have been described in the treatment of distal radius fractures. The fixation of radius distal end fracture with volar plate was first applied by Ellis in 1965. Over the years, ideas have been put forward on the materials used for plates and the radiolucent carbon fiber plates has been used. These plates cause less artifact in computed tomography (CT) and magnetic resonance examinations (MRI), allow a better evaluation of the fracture, exhibit biomechanical characteristics close to the cortical bone, and do not cause a coldwedding in patients.