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Assessing Coronary Sinus Blood Flow in Patients with Coronary Artery Disease

A Comparison of Phase-Contrast MR Imaging with Positron Emission Tomography

Juha W. Koskenvuo1, Jaakko J. Hartiala1, Juhani Knuuti2, Hajime Sakuma3, Jyri O. Toikka1, Markku Komu4, Markku Saraste1 and Pekka Niemi4

1 Department of Clinical Physiology, Turku University Hospital, Kiinamyllynkatu 4-8, 20520 Turku, Finland.
2 Turku PET Centre, University of Turku, Kiinamyllynkatu 4-8, 20520 Turku, Finland.
3 Department of Radiology, Mie University Hospital, 2174 Edobashi, Tsu, Mie 514-8507, Japan.
4 Department of Radiology, Turku University Hospital, Kiinamyllynkatu 4-8, 20520 Turku, Finland.



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  		Fig. 1A. —55-year-old man with three-vessel coronary artery disease. Arrows indicate coronary sinus. T1-weighted gradient-echo MR image shows coronal scout image of coronary sinus. White line was set horizontally through coronary sinus.

 


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  		Fig. 1B. —55-year-old man with three-vessel coronary artery disease. Arrows indicate coronary sinus. T1-weighted gradient-echo MR image obtained at level indicated by white line in A shows axial scout image of coronary sinus. White zigzagged line was set perpendicularly through coronary sinus 1-2 cm proximal to right atrium.

 


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  		Fig. 1C. —55-year-old man with three-vessel coronary artery disease. Arrows indicate coronary sinus. T1-weighted gradient-echo MR image obtained at level indicated by white line in B shows cross-sectional plane of coronary sinus.

 


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  		Fig. 1D. —55-year-old man with three-vessel coronary artery disease. Arrows indicate coronary sinus. Phase-contrast flow image shows coronary sinus.

 


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  		Fig. 2. —Graph shows correlation of myocardial blood flow (mL·g-1·min-1) when measured using MR imaging and positron emission tomography. Both baseline and hyperemia results are included. Relatively good agreement between measurements was found; r=0.80, p<0.01, y=0.83 x +0.04.

 


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  		Fig. 3. —Graph shows correlation of global coronary flow reserve as measured using MR imaging and positron emission tomography. Only moderate correlation was found between coronary flow reserve measurements provided by each modality; r = 0.50, p < 0.01, y = 1.12 x +0.06.

 


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  		Fig. 4. —Graph shows Bland-Altman [33] analysis of global myocardial blood flow measurements achieved using positron emission tomography and MR imaging. Differences are presented as absolute values.

 


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  		Fig. 5. —Graph shows Bland-Altman [33] analysis of global coronary flow reserve measurements achieved using positron emission tomography and MR imaging. Differences are presented as absolute values.

 

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