Editing CT scan (section)

=== Angiography ===
[[File:SADDLE PE.JPG|thumb|Example of a CTPA, demonstrating a saddle [[pulmonary embolism|embolus]] (dark horizontal line) occluding the [[pulmonary artery|pulmonary arteries]] (bright white triangle)]]
{{Main|Computed tomography angiography}}

[[Computed tomography angiography]] (CTA) is a type of [[contrast CT]] to visualize the [[arteries]] and [[vein]]s throughout the body.<ref>{{Citation |last1=McDermott |first1=M. |title=Chapter 10 – Critical care in acute ischemic stroke |date=2017-01-01 |journal=Handbook of Clinical Neurology |volume=140 |pages=153–176 |editor-last=Wijdicks |editor-first=Eelco F. M. |series=Critical Care Neurology Part I |publisher=Elsevier |doi=10.1016/b978-0-444-63600-3.00010-6 |pmid=28187798 |last2=Jacobs |first2=T. |last3=Morgenstern |first3=L. |editor2-last=Kramer |editor2-first=Andreas H.}}</ref> This ranges from arteries serving the [[brain]] to those bringing blood to the [[lung]]s, [[kidney]]s, [[arm]]s and [[leg]]s. An example of this type of exam is [[CT pulmonary angiogram]] (CTPA) used to diagnose [[pulmonary embolism]] (PE). It employs computed tomography and an [[iodinated contrast|iodine-based contrast agent]] to obtain an image of the [[pulmonary artery|pulmonary arteries]].<ref>{{Cite web |date=19 November 2019 |title=Computed Tomography Angiography (CTA) |url=https://www.hopkinsmedicine.org/health/treatment-tests-and-therapies/computed-tomography-angiography-cta |access-date=2021-03-21 |website=www.hopkinsmedicine.org}}</ref><ref>{{Cite journal |last1=Zeman |first1=R K |last2=Silverman |first2=P M |last3=Vieco |first3=P T |last4=Costello |first4=P |date=1995-11-01 |title=CT angiography. |journal=American Journal of Roentgenology |volume=165 |issue=5 |pages=1079–1088 |doi=10.2214/ajr.165.5.7572481 |issn=0361-803X |pmid=7572481 |doi-access=free}}</ref><ref>{{Cite book |last1=Ramalho |first1=Joana |url=https://books.google.com/books?id=FKdMAgAAQBAJ&q=cta+is+an+imaging |title=Vascular Imaging of the Central Nervous System: Physical Principles, Clinical Applications, and Emerging Techniques |last2=Castillo |first2=Mauricio |date=2014-03-31 |publisher=John Wiley & Sons |isbn=978-1-118-18875-0 |page=69}}</ref> CT scans can reduce the risk of angiography by providing clinicians with more information about the positioning and number of clots prior to the procedure.<ref>{{Cite journal |last1=Jones |first1=Daniel A. |last2=Beirne |first2=Anne-Marie |last3=Kelham |first3=Matthew |last4=Rathod |first4=Krishnaraj S. |last5=Andiapen |first5=Mervyn |last6=Wynne |first6=Lucinda |last7=Godec |first7=Thomas |last8=Forooghi |first8=Nasim |last9=Ramaseshan |first9=Rohini |last10=Moon |first10=James C. |last11=Davies |first11=Ceri |last12=Bourantas |first12=Christos V. |last13=Baumbach |first13=Andreas |last14=Manisty |first14=Charlotte |last15=Wragg |first15=Andrew |date=2023-10-31 |title=Computed Tomography Cardiac Angiography Before Invasive Coronary Angiography in Patients With Previous Bypass Surgery: The BYPASS-CTCA Trial |journal=Circulation |language=en |volume=148 |issue=18 |pages=1371–1380 |doi=10.1161/CIRCULATIONAHA.123.064465 |issn=0009-7322 |pmc=11139242 |pmid=37772419}}</ref><ref>{{Cite journal |date=6 August 2024 |title=CT scan reduces the complications of angiography after bypass surgery |url=https://evidence.nihr.ac.uk/alert/ct-scan-reduces-the-complications-of-angiography-after-bypass-surgery/ |journal=NIHR Evidence|doi=10.3310/nihrevidence_63153 |doi-access=free }}</ref>