High-Resolution MDCT of Pulmonary Septic Embolism: Evaluation of the Feeding Vessel Sign
Jonathan D. Dodd1,2,
Carolina A. Souza1,2 and
Nestor L. Müller1,2
1 Department of Radiology, Vancouver General Hospital, Vancouver, BC,
Canada.
2 Department of Radiology, St. Vincents University Hospital, 855 W 12th Ave.,
Vancouver, BC, Canada V6K 1R4.

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Fig. 1A 49-year-old male IV drug user with epidural abscess and
positive culture results for Staphylococcus aureus. Blood cultures
also were positive for Staphylococcus aureus. Transverse 1.25-mm
contiguous MDCT images through left upper lobe show irregular nodule
(curved arrow) with distinct central vessel (straight arrow)
leading into its center.
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Fig. 1B 49-year-old male IV drug user with epidural abscess and
positive culture results for Staphylococcus aureus. Blood cultures
also were positive for Staphylococcus aureus. Transverse 1.25-mm
contiguous MDCT images through left upper lobe show irregular nodule
(curved arrow) with distinct central vessel (straight arrow)
leading into its center.
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Fig. 1C 49-year-old male IV drug user with epidural abscess and
positive culture results for Staphylococcus aureus. Blood cultures
also were positive for Staphylococcus aureus. Transverse 1.25-mm
contiguous MDCT images through left upper lobe show irregular nodule
(curved arrow) with distinct central vessel (straight arrow)
leading into its center.
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Fig. 1D 49-year-old male IV drug user with epidural abscess and
positive culture results for Staphylococcus aureus. Blood cultures
also were positive for Staphylococcus aureus. Contiguous coronal
1.25-mm multiplanar reconstructions show vessel (arrow) passing
around nodule, which was not appreciable on transverse images.
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Fig. 1E 49-year-old male IV drug user with epidural abscess and
positive culture results for Staphylococcus aureus. Blood cultures
also were positive for Staphylococcus aureus. Contiguous coronal
1.25-mm multiplanar reconstructions show vessel (arrow) passing
around nodule, which was not appreciable on transverse images.
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Fig. 1F 49-year-old male IV drug user with epidural abscess and
positive culture results for Staphylococcus aureus. Blood cultures
also were positive for Staphylococcus aureus. Contiguous coronal
1.25-mm multiplanar reconstructions show vessel (arrow) passing
around nodule, which was not appreciable on transverse images.
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Fig. 1G 49-year-old male IV drug user with epidural abscess and
positive culture results for Staphylococcus aureus. Blood cultures
also were positive for Staphylococcus aureus. Contiguous coronal
1.25-mm multiplanar reconstructions show vessel (arrow) passing
around nodule, which was not appreciable on transverse images.
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Fig. 2A 25-year-old female IV drug user admitted to hospital with
shortness of breath. Blood cultures were positive for Staphylococcus
aureus. Transverse 1.25-mm MDCT image through left lower lobe shows
cavitating wedge-shaped opacity with distinct central vessel (arrow)
leading into it.
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Fig. 2B 25-year-old female IV drug user admitted to hospital with
shortness of breath. Blood cultures were positive for Staphylococcus
aureus. Contiguous coronal oblique 1.25-mm multiplanar reconstruction
does not adequately depict precise relation of vessel relative to cavitating
opacity (arrow).
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Fig. 2C 25-year-old female IV drug user admitted to hospital with
shortness of breath. Blood cultures were positive for Staphylococcus
aureus. Oblique IV contrast-enhanced 20-mm maximum-intensity-projection
(MIP) image shows vessels (arrows) passing around sides of cavitating
nodule that were not identified on transverse images. MIP images confirmed
vessel to be venous. Second, smaller more caudal nodule has several vessels
(arrowheads) passing around it.
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Fig. 3A Same patient as in Figures
2A,
2B, and
2C. Transverse 1.25-mm MDCT
image through right lower lobe shows cavitating nodule (curved arrow)
with distinct central vessel (straight arrow) leading into it.
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Fig. 3B Same patient as in Figures
2A,
2B, and
2C. Coronal oblique1.25-mm
multiplanar reconstruction confirms presence of distinct central vessel
(arrow) leading into opacity.
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Fig. 3C Same patient as in Figures
2A,
2B, and
2C. Selected transverse
1.25-mm MDCT images after IV administration of contrast bolus show vessel
(arrow) filled with contrast material coursing superiorly and
medially and inserting into left atrium, consistent with pulmonary vein.
Curved arrow indicates nodule.
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Fig. 3D Same patient as in Figures
2A,
2B, and
2C. Selected transverse
1.25-mm MDCT images after IV administration of contrast bolus show vessel
(arrow) filled with contrast material coursing superiorly and
medially and inserting into left atrium, consistent with pulmonary vein.
Curved arrow indicates nodule.
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Fig. 3E Same patient as in Figures
2A,
2B, and
2C. Selected transverse
1.25-mm MDCT images after IV administration of contrast bolus show vessel
(arrow) filled with contrast material coursing superiorly and
medially and inserting into left atrium, consistent with pulmonary vein.
Curved arrow indicates nodule.
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Fig. 3F Same patient as in Figures
2A,
2B, and
2C. Selected transverse
1.25-mm MDCT images after IV administration of contrast bolus show vessel
(arrow) filled with contrast material coursing superiorly and
medially and inserting into left atrium, consistent with pulmonary vein.
Curved arrow indicates nodule.
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Fig. 3G Same patient as in Figures
2A,
2B, and
2C. Coronal oblique 20-mm
maximum-intensity-projection images confirm vessel (arrow) as
venous.
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Fig. 3H Same patient as in Figures
2A,
2B, and
2C. Coronal oblique 20-mm
maximum-intensity-projection images confirm vessel (arrow) as
venous.
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Copyright © 2006 by the American Roentgen Ray Society.