To evaluate the role of the right lateral (RL) imaging in the attenuation correction of left ventricular inferior wall. The RL imaging were obtained immediately after the supine imaging. The inferior wall configuration and regional myocardial counts were assessed by tomography imaging and quantitative polar map analysis for 31 normal controls and 22 coronary artery disease patients all with coronary arteriography. The results were compared between the two imagings. The sensitivity and specificity of diagnosis were compared by both imagings. Results shown that better configuration and higher inferior myocardial counts per pixel were observed in the RL than in supine imaging ( P <0.05). Right CAD sensitivity and specificity of lesions for supine imaging were 90.0% and 63.6%

whereas 100% and 81.8% respectively for RL imaging. The RL imaging can well collect the attenuation of inferior wall and improve diagnostic accuracy the right CAD lesions.