Conventional coronary angiography is considered to be the technique of choice for the diagnosis of in-stent restenosis, the latest generation of multidetector (multisection) CT scanners, which offer a smaller voxel size, faster gantry rotation speed, and reconstruction per gantry rotation, provide an appealing alternative for noninvasive luminal assessment in patients with chest pain after coronary stent placement, the improved hardware configuration of multidetector CT scanners allows direct visualization of the stent struts and lumen for a more reliable assessment of instent patency than is allowed by the visualization of distal runoff.Multidetector CT also can be useful to assess the condition of the whole coronary tree, as it provides information about the number, severity, and location of coronary lesions. In the follow-up of asymptomatic patients after stent implantation.