The pulmonary vasculature may be evaluated with various invasive and noninvasive methods. This was a retrospective study. This was a retrospective study. Within the last several years, spiral computed tomography angiography (SCTA) of the pulmonary arteries has emerged as a noninvasive angiographic modality for the evaluation of patients with suspected pulmonary embolism (PE). Further reduction in radiation and contrast medium doses is necessary. CTPA was introduced in the 1990s as an alternative to ventilation/perfusion scanning, which relies on radionuclide imaging of the blood vessels of the lung. Using contrast injected into the blood vessels, images are created to look for blockages, aneurysms (dilations of walls), dissections (tearing of walls), and stenosis (narrowing of vessel). CT pulmonary angiography (CTPA) is a medical diagnostic test that employs computed tomography to obtain an image of the pulmonary arteries. Methods: 47 patients (25 females) with mean age 69 years (range 41–82 years) referred for contrast-enhanced chest CT were prospectively included in this Phase IV clinical drug trial. Purpose. Burge et al. Pulmonary angiography is a test to see how blood flows through the lung. CT Pulmonary Angiography > Introuduction > Purpose. Since then, several groups of investigators in the United States and Europe have reported high accuracy of the technique (compared with sonography) for the diagnosis or exclusion of deep venous thrombosis (DVT) in the inguinal regions and thighs. Objective: This study is to investigate the possibility of CT Pulmonary Angiography (CTPA) at low kV and low-concentration contrast medium using iterative reconstruction technique. Keywords: Computed tomography pulmonary angiography Diagnosis Pulmonary embolism Introduction Computed tomography pulmonary angiography (CTPA) is currently the first line imaging technique as recommended by SCTA is based on continuous computed tomography (CT) data acquisition during patient transport through the rotating X‐ray tube and detector system, where … It is a preferred choice of imaging in the diagnosis of PE due to its minimally invasive nature for the patient, whose only requirement for the scan is an intravenous line. DOI: 10.1007/s10140-015-1340-7 Corpus ID: 25656105. NB: This article is intended to outline some general principles of protocol design. Objective: The purpose of this article is to describe the techniques to improve motion artifacts, vascular enhancement, flow artifacts, body habitus image noise, vascular opacification in parenchymal lung disease, streak artifacts, and the indeterminate CT pulmonary angiogram. Computerized tomography pulmonary angiography (CTPA) is the gold standard technique in detecting PE with high sensitivity and specificity . OBJECTIVE: To determine the overall sensitivity and specificity for CT pulmonary angiography (CTPA) in the diagnosis of pulmonary emboli (PE) using a meta-analysis of the published literature. CTA (CTPA – CT pulmonary angiography) has been the technique of choice for detection of pulmonary embolism for at least the last decade . CT pulmonary angiogram (or CTPA) is a special test used primarily to look for the presence of pulmonary embolism (blood clots in the lung).. How is a CTPA performed? For CT Angiography, there is no need for sedation or general anesthesia. Since CTPA is the first imaging modality in detecting PE in susceptible patients, detecting predictive CTPA indices in identifying high-risk patients would be of high value to reduce the mortality rate [ 3 ]. CTPA was introduced in the 1990s as an alternative to ventilation/perfusion scanning, which relies on radionuclide imaging of the blood vessels of the lung. PURPOSE: A bolus injection of contrast medium (CM) in CTPA over-elevates the density in the veins. In addition, this article will illustrate the diagnostic criteria of acute and chronic pulmonary emboli. CT dose index (CTDIvol) and dose length product (DLP) were obtained. PE is a potentially fatal disease in which a thrombus is lodged into a pulmonary artery blocking blood flow and potentially leading to respiratory distress, acute right cardiac failure or death. The specifics will vary depending on CT hardware and software, radiologists' and referrers' preferences, institutional protocols, patient factors (e.g. Objectives To investigate the feasibility of high-pitch CT pulmonary angiography (CTPA) in 3rd generation dual-source CT (DSCT) in unselected patients. In this presentation, we discuss scanning technique and present a simple, systematic, stepwise approach to the interpretation of these studies. Not only does it allow demonstration of associated interstitial lung disease (ILD) but CT pulmonary angiography (CTPA) also permits exclusion of significant thromboembolic disease. It makes too difficult to diagnose PE sometimes. Arteries are blood vessels that carry blood away from the heart. 1 Because clinical signs or symptoms are often non‐specific, diagnosis relies on imaging tests, which include radioisotope ventilation perfusion scanning and, more commonly over recent years, computed tomography pulmonary angiography (CTPA). The scans were modified to create reduced anatomic coverage scans extending from … Computed tomographic pulmonary angiography (CTPA) is considered the gold standard for the diagnosis of pulmonary embolism (PE). MATERIALS AND METHODS: 24 consecutive patients suspected PE underwent CTPAs using a 64-detector MDCT. Eighty-four CTPA exams performed on pregnant women during 2004–2012. CT pulmonary angiogram (CTPA) is a medical diagnostic test that employs computed tomography (CT) angiography to obtain an image of the pulmonary arteries.Its main use is to diagnose pulmonary embolism (PE). allergy) and time constraints. The aim of this study is to determine the feasibility of using reduced scan range CT pulmonary angiography technique in pregnancy for pulmonary embolism (PE) and to quantify resulting dose reduction. The rapid progress in cross-sectional imaging techniques offers a great help in the development of a reliable, accurate, and readily available technique for diagnosing pulmonary embolism , . Eighty-four CTPA exams performed on … Introduction. Radiologic Technologist 16,525 views Reduced z-axis technique for CT Pulmonary angiography in pregnancy—validation for practical use and dose reduction @article{Shahir2015ReducedZT, title={Reduced z-axis technique for CT Pulmonary angiography in pregnancy—validation for practical use and dose reduction}, author={Kaushik Shahir and Jonathan M … Abstract. looked at a New York State Statewide Planning and Research A CTPA is performed in the radiology department scanning room, with the patient lying flat (supine) on a CT table.The head is placed in a comfortable ‘docking pillow’ and the CT scanner … Historically, catheter-directed pulmonary angiography has been used most commonly for the diagnosis of suspected pulmonary embolism (PE). A pulmonary angiography is typically performed to measure the pressure of the blood vessels carrying blood to your lungs and to evaluate for blockages or … rule-out CT is not recommended due to the low diagnostic yield. CT angiography of the chest (CTA chest) is a cross-sectional diagnostic examination that can be performed ECG-gated or non-ECG gated. ! Radiopaque contrast material is injected, and the pulmonary arterial tree is visualized on a series of rapidly exposed chest radiographs ( Fig. Methods: Ninety suspected cases of Pulmonary Embolism (PE) scheduled for CTPA were randomly and equally divided into 3 groups (group A, B and C). [Figure][1] The purpose of this study is to evaluate three injection protocols for CTPA to improve the image quality of rPA. Pulmonary embolism is a common condition with considerable morbidity and mortality. CT angiography may provide more precise anatomical details than other angiography exams such as conventional catheter angiography and magnetic resonance imaging (MRI). CT angiography (CTA) is considered the gold standard in diagnosis of PE . 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