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Preoperative assessment of abdominal aortic aneurysm: The value of helical and three- dimensional computed tomography  Mario N. Gomes, MD, William J. Davros,

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Presentation on theme: "Preoperative assessment of abdominal aortic aneurysm: The value of helical and three- dimensional computed tomography  Mario N. Gomes, MD, William J. Davros,"— Presentation transcript:

1 Preoperative assessment of abdominal aortic aneurysm: The value of helical and three- dimensional computed tomography  Mario N. Gomes, MD, William J. Davros, PhD, Robert K. Zeman, MD  Journal of Vascular Surgery  Volume 20, Issue 3, Pages (September 1994) DOI: / (94) Copyright © 1994 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

2 Fig. 1 Technical principles of helical CT. A, All components pictured within slip-ring gantry of this helical scanner rotate around patient during x-ray exposure. B, Because patient is advanced into gantry during exposure, helically shaped distribution of projections is obtained, from which sections are reconstructed (Courtesy of Robert K. Zeman, MD.) Journal of Vascular Surgery  , DOI: ( / (94) ) Copyright © 1994 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

3 Fig. 2 Helical CT images of AAA. A, Surface model shows fusiform, infrarenal, AAA, not involving iliac arteries; note renal arteries and SMA. B, Ray Sum projection outlines contrast-filled aortic lumen and renal arteries. C, Maximum intensity projection displays calcified areas in aorta and iliac arteries. D, Standard axial image clearly demonstrates intraaneurysmal thrombus not seen in three-dimensional views. Journal of Vascular Surgery  , DOI: ( / (94) ) Copyright © 1994 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

4 Fig. 3 Superior-inferior view of an abdominal aorta demonstrates capability of displaying three-dimensional model from any angle. Note both renal arteries, SMA, and preaortic left renal vein. Journal of Vascular Surgery  , DOI: ( / (94) ) Copyright © 1994 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

5 Fig. 4 Infrarenal aneurysm with long neck as seen in angiographic appearance on Ray Sum projection. Renal and SMA are also demonstrated. Journal of Vascular Surgery  , DOI: ( / (94) ) Copyright © 1994 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

6 Fig. 5 Small aneurysmal dilation of infrarenal aortic stump after resection of aortic aneurysm and tube graft interposition 8 years ago as seen on surface model. A, Anteroposterior view — left renal vein crosses aorta anteriorly partially obscuring that segment. B, Posteroanterior view clearly shows dilated segment (arrow). C, MIP projection displays heavy calcification of aortic bifurcation and common iliac arteries below graft. Journal of Vascular Surgery  , DOI: ( / (94) ) Copyright © 1994 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

7 Fig. 6 Left double renal artery (arrow) seen on oblique superior-inferior projection. Journal of Vascular Surgery  , DOI: ( / (94) ) Copyright © 1994 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

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