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Basic Understanding of Medical Imaging Modalities
Published in Sanjay Saxena, Sudip Paul, High-Performance Medical Image Processing, 2022
Pradeep Kumar, Subodh Srivastava, Rajeev Srivastava
Angiography is a type of medical image process which is used for the anticipation of the inside of blood vessels, especially the arteries, veins, and the heart chambers. For the study of angiography contrast media is infused into the blood vessels [8]. In this method also we use x-rays. There are two types of angiography machines, conventional angiography, or digital subtraction angiography. Commonly used angiography is digital subtraction angiography. Presently, most of the measures achieved by angiography are replaced by CT angiography or magnetic resonance angiography. Angiography is typically used for diagnosing issues with obstructive vascular diseases, bleeding vessels, arterio-venous malformations, and assessment of the vascularity of malignant tumors. Radiation doses from fluoroscopy are higher because of that pregnancy status must be known prior to test. Children are more tactful to radiation so x-ray procedure should be performed with caution (Figure 1.3) [5].
Liver and biliary system, pancreas and spleen
Published in A Stewart Whitley, Jan Dodgeon, Angela Meadows, Jane Cullingworth, Ken Holmes, Marcus Jackson, Graham Hoadley, Randeep Kumar Kulshrestha, Clark’s Procedures in Diagnostic Imaging: A System-Based Approach, 2020
A Stewart Whitley, Jan Dodgeon, Angela Meadows, Jane Cullingworth, Ken Holmes, Marcus Jackson, Graham Hoadley, Randeep Kumar Kulshrestha
With the recent improvements in ultrasound, CT and MRI, angiography is less frequently used because of its invasive nature. However, selective coeliac axis arteriography is still used to demonstrate vascular lesions within the liver and can be combined with CT in CT angiographic studies.
Vascular Tree Segmentation from Different Image Modalities
Published in Ayman El-Baz, Jasjit S. Suri, Cardiovascular Imaging and Image Analysis, 2018
Ali Mahmoud, Ahmed Shalaby, Fatma Taher, Maryam El-Baz, Jasjit S. Suri, Ayman El-Baz
X-ray angiography is used to image and diagnose diseases of the blood vessels of the body, including the brain and heart [6], [7]. Traditionally, angiography was used to diagnose pathology of these vessels such as blockage caused by plaque buildup. However in recent decades, radiologists, cardiologists, and vascular surgeons have used X-ray angiography to guide minimally invasive procedures of the blood vessels and arteries of the heart.
Estimation of coronary stenosis severity based on flow distribution ratios
Published in Computer Methods in Biomechanics and Biomedical Engineering, 2022
Idit Avrahami, Hadar Biran, Alex Liberzon
Minimally (or non) invasive geometry-based methods may include X-ray angiography, coronary computed tomography angiography (CTA), or magnetic resonance angiography (MRA). These visual-based assessment methods are prone to error since the anatomy geometry may not predict well the actual reduction in maximal flow capacity in a distal vascular bed (Klabunde 2011). Performing treatments based on geometry alone can lead to over-stenting which can lead to various complications (Shaknovich 1994).