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CT Angiography in Suspected Pulmonary Embolism: Impact of Patient Characteristics and Different Venous Lines on Vessel Enhancement and Image Quality

Daniela Roggenland1, Soeren A. Peters1, Stefan P. Lemburg1, Tim Holland-Letz2, Volkmar Nicolas1 and Christoph M. Heyer1

1 Departments of Interventional Radiology and Nuclear Medicine, Institute of Diagnostic Radiology, BG Clinics "Bergmannsheil," Ruhr-University of Bochum, Buerkle-de-la-Camp Platz 1, D-44789 Bochum, Germany,
2 Department of Medical Informatics, Biometry and Epidemiology, Ruhr-University of Bochum, Bochum, Germany.


Figure 1
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  		Fig. 1A —Relationship of image quality parameters and patient characteristics/different venous lines. Diagonal lines indicate linear regression. Comparison of patient age and mean vessel enhancement in regression analysis (r = 0.266).

 

Figure 2
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  		Fig. 1B —Relationship of image quality parameters and patient characteristics/different venous lines. Diagonal lines indicate linear regression. Comparison of patient age and peak vessel enhancement in regression analysis (r = 0.244).

 

Figure 3
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  		Fig. 1C —Relationship of image quality parameters and patient characteristics/different venous lines. Diagonal lines indicate linear regression. Comparison of patient age and contrast-to-noise ratio in regression analysis (r = 0.178).

 

Figure 4
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  		Fig. 1D —Relationship of image quality parameters and patient characteristics/different venous lines. Diagonal lines indicate linear regression. Comparison of patient age and subjective image quality in regression analysis (r = 0.344).

 

Figure 5
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  		Fig. 2A —Relationship of image quality parameters and patient characteristics/different venous lines. Diagonal lines indicate linear regression. Comparison of body weight and mean vessel enhancement in regression analysis (r = -0.473).

 

Figure 6
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  		Fig. 2B —Relationship of image quality parameters and patient characteristics/different venous lines. Diagonal lines indicate linear regression. Comparison of body weight and peak vessel enhancement in regression analysis (r = -0.496).

 

Figure 7
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  		Fig. 2C —Relationship of image quality parameters and patient characteristics/different venous lines. Diagonal lines indicate linear regression. Comparison of body weight and signal-to-noise ratio in regression analysis (r = -0.446).

 

Figure 8
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  		Fig. 2D —Relationship of image quality parameters and patient characteristics/different venous lines. Diagonal lines indicate linear regression. Comparison of body weight and contrast-to-noise ratio in regression analysis (r = -0.425).

 

Figure 9
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  		Fig. 2E —Relationship of image quality parameters and patient characteristics/different venous lines. Diagonal lines indicate linear regression. Comparison of body weight and subjective image quality in regression analysis (r = -0.422).

 

Figure 10
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  		Fig. 3A —Relationship of image quality parameters and patient characteristics/different venous lines. Comparison of type of venous lines and signal-to-noise ratio.

 

Figure 11
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  		Fig. 3B —Relationship of image quality parameters and patient characteristics/different venous lines. Comparison of type of venous lines and contrast-to-noise ratio.

 

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