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.
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.
Exposure to radiation, such as during routine CTs, bone scans, or X-rays, causes oxidative stress which can damage the DNA (your genetic material) within your white blood cells. While the amount of DNA damage that may occur from one scan is not harmful to your overall health, there could be concerning damage in patients who are constantly exposed to this radiation. Currently, there is no way to prevent DNA damage during a medical scan. One potential way to fight the oxidative stress caused by radiation is to take an antioxidant before a scan. The purpose of this study is to see if a combination of antioxidants can protect someone from the damage that radiation causes to the DNA of their white blood cells.
Fluoroscopy is performed when placing a lead during a sacral neuromodulation procedure. During lead placement, subjects will receive either conventional or experimental fluoroscopic settings. The radiation exposure will be compared between the two groups.
Trial's objective is to evaluate: i. if there's any difference between the operator radiation exposure during diagnostic coronary angiography and/or percutaneous coronary intervention (PCI) performed through right-side artery accesses (wrist transradial access and distal transradial access) versus left distal radial artery access ii. the relationship between operator radiation exposure and other clinical and procedural characteristics, to assess independent predictors of operator radiation exposure. Design of the study: prospective multicenter observational cohort registry (OCR). The purpose of this OCR is to assess the radiation exposure of interventional cardiologist during a diagnostic coronary angiography and/or PCI according to vascular access used (see above). Coronary angiography and PCI will be performed according to usual practice
Thyroid carcinoma is the most common endocrine malignancy. Surgery is the standard therapeutic approach for patients with differentiated thyroid carcinoma (DTC), followed by radioiodine (RAI) therapy if indicated. For women with DTC, the effects of RAI therapy on gonadal and reproductive function are an important consideration. This study aimed to evaluate the effects of RAI therapy on ovarian function.
Fluoroscopy is integral part of diagnostic and therapeutic cardiac procedures. Among medical personnel, interventional cardiologists have the highest per head per year exposure to ionizing radiation which is two to three times greater than the radiologists. Although the patients' exposure is well below the level associated with increased cancer risk, yet as mentioned above, any exposure can be harmful and must be minimized using all possible dose reduction methods under the principle of 'As Low as Reasonably Achievable' (ALARA). Radiation exposure is influenced by factors that are dependent on patient (weight, body habitus), procedure (access site, procedure complexity, use of protective shielding, collimation) and equipment (overall quality control, field of view, beam filters thickness, pulse rate etc.). In fact in modern fluoroscopic equipment, several settings are customizable to aid reduce total emitted X-ray dose. In a diverse coronary lab as Tabba Heart institute, in addition to training the lab staff on reducing radiation exposure and use of protective gear, employment of a modern X ray system Like Toshiba (Infinix i8000V, Toshiba America Medical Systems, Inc.); equipped with customizable radiation dose reduction technologies and DTS, provides the interventionists an essential tools to ensure the highest radiation safety standards. Data is still scanty to show the difference in patients and operators' radiation exposures by using tailored equipment settings. We aim to apply customized fluoroscopy protocols based on low fps and other customizable settings (thickness of the spectral beam filters, peak tube voltage and peak cathode current, live zoom (1.4 factors with 12 inch FOV), fluoro store and Spot fluoroscopy) and then assess if they significantly affect the radiation exposure of the patient and the interventionist.
Randomized comparison of radiation exposure in coronary angiography between right conventional and left distal radial artery approach