1. Arterial bending angle and wall morphology correlate with slow coronary flow: Determination with multidetector CT coronary angiography 
Mecit Kantarci, Fuat Gündogdu, Selim Doganay, Cihan Duran, M. Emin Kalkan, M. Erdem Sagsoz, Osman Kucuk, Afak Karakaya, Ahmet Kucuk, Metin Akgün 
European Journal of Radiology 
Volume 77, Issue 1, Pages (January 2011)
DOI: /j.ejrad
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2. Fig. 1
Schematic representation of a bent vessel. Head loss in a bent pipe is given as; hl=k(m˙22gρ2A2). Here k depends on bend angle as shown in Table 1.
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3. Fig. 2
(a and b) In normal anatomic configurations, the RCA and LMCA originated from the left and right sinus Valsalva and separated from the aorta at an angle of nearly 90°. Ao; Aorta.
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4. Fig. 3
(a and b) The angle between each main coronary artery and the aorta and its mathematical calculation (a). 56-year-old man with CSF; the axial CT angiographic image shows that the angle between the left main coronary artery and the aorta is narrowing.
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5. Fig. 4
(a and b) The angulations of the right and left coronary arteries from the aorta. Angled right (a) and left coronary arteries (b) are shown.
European Journal of Radiology  , DOI: ( /j.ejrad )
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6. Fig. 5
On the proximal segment of the LAD, multiple discrete mixed plaques that lead to positive remodeling are observed (arrows).
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7. Fig. 6
It was observed that the lower the LMCA angle, the higher the LAD frame count. The two are significantly negatively correlated (r=−0.660, p<0.001).
European Journal of Radiology  , DOI: ( /j.ejrad )
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8. Fig. 7
As the angle between the RCA and the aorta decreases, the frame count of the RCA is increased; in other words, the flow rate is slower. A significant negative correlation exists (r=−0.834, p<0.001).
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9. Fig. 8
Comparison of the angles of the LAD (boxes show mean values, lines show standard deviations) and the RCA in the cases who had normal or slow coronary flow.
European Journal of Radiology  , DOI: ( /j.ejrad )
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