Ct Pulmonary Angiography
Ct Pulmonary Angiography - Related Videos
02:37
CT-guided Preoperative Localization of Pulmonary Nodules Using a Glucose Test and Tissue Adhesive
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2026
This CT-guided protocol localizes ground-glass nodules preoperatively using tissue adhesive and a glucose test, which verifies needle placement and prevents airway injection-enhancing safety and distinguishing it from prior localization techniques.
06:59
Catheter-based Endovascular Angioplasty for Fibrosing Mediastinitis-associated Pulmonary Vein Stenosis
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2025
Pulmonary vein stenosis (PVS) is a life-threatening complication of fibrosing mediastinitis (FM), with a poor prognosis if not properly treated. Currently, catheter-based endovascular angioplasty is a promising therapeutic strategy for FM-associated PVS. This protocol primarily outlines a stepwise approach to the transcatheter procedure for FM-associated PVS.
06:59
Improved Registration of 3D CT Angiography with X-ray Fluoroscopy for Image Fusion During Transcatheter Aortic Valve Implantation
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Cited by 1 •
2018
The aim of this study was to improve the co-registration for image fusion (IF) of pre-interventional CT data with real-time x-ray (XR) fluoroscopy during transfemoral transcatheter aortic valve implantation (TAVI).
09:08
Combined SPECT and CT Imaging to Visualize Cardiac Functionality
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2023
Source: Alycia G. Berman, James A. Schaber, and Craig J. Goergen, Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana Here we will demonstrate the fundamentals of single-photon emission computed tomography/computed tomography (SPECT/CT) imaging using mice. The technique involves injecting a radionuclide into a mouse, imaging the animal after it is distributed throughout the body, and then reconstructing the produced images to create a volumetric dataset. This can...
08:57
High Resolution 3D Imaging of Ex-Vivo Biological Samples by Micro CT
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Cited by 13 •
2011
Non-destructive volume visualization can be achieved only by tomographic techniques, of which the most efficient is the x-ray micro computerized tomography ( CT).
FAQs
CTPA timing depends on matching intravenous iodinated contrast passage through the bloodstream with CT acquisition of the pulmonary arterial phase. If images are obtained too early or late, the arteries may not be adequately opacified for reliable assessment. Proper timing therefore supports visualization of the arterial lumen and improves the chance of recognizing filling defects.
Within an opacified pulmonary artery, a filling defect represents a region where the expected contrast-filled vascular space is interrupted on the acquired images. In the appropriate clinical setting, this finding can support evaluation for pulmonary embolism. Adequate arterial opacification remains essential because the study is designed to show abnormalities within the pulmonary vasculature.
Rapid acquisition allows clinicians to obtain detailed pulmonary vascular images efficiently when acute pulmonary embolism is suspected. This combination of speed and high anatomic detail makes CTPA particularly valuable in emergency medicine, where timely evaluation can help diagnose or exclude a serious vascular cause of respiratory or thoracic symptoms.
Before CTPA, clinicians should assess whether the expected diagnostic value justifies exposure to intravenous iodinated contrast and ionizing radiation. This assessment is especially important when alternative explanations or other evaluation strategies may be relevant. Appropriate patient selection helps preserve the benefits of rapid, detailed imaging while limiting avoidable exposure.
Clinicians may choose CTPA when pulmonary embolism is part of the diagnostic concern and direct assessment of the pulmonary arteries is needed. The examination can help establish the presence of vascular filling defects or support exclusion of acute pulmonary embolism. Its role is therefore centered on rapid evaluation of suspected pulmonary vascular disease.
CTPA may reveal abnormalities outside the pulmonary arteries, including lung or pleural disease. These alternative findings can provide another explanation for the patient’s thoracic presentation when pulmonary embolism is not identified. Consequently, the examination may contribute broader diagnostic information than vascular assessment alone, while still requiring careful interpretation of the acquired chest images.