Diagnostic accuracy of 64-slice multidetector CT for detection of in-stent restenosis in an unselected, consecutive patient population

Angiographic CT after Intravenous Contrast Agent Application: A Noninvasive Follow-Up Tool after Intracranial Angioplasty and Stenting

“…12 Similar results have been shown in studies evaluating MDCTA in the assessment of ISR in small coronary stents. 13 On the contrary, ACT has proved to be a technique with performance characteristics suitable for imaging small highcontrast structures such as intracranial stents. 22 Due to its superior spatial resolution compared with MDCT, ACT has already proved to be better for the depiction of self-expandable intracranial stents or other small objects, such as cochlear implants.…”

“…Similar conclusions have been drawn in studies evaluating MDCTA in the assessment of ISR in coronary stents. 13 On the other hand, earlier studies have already presented the potential of ACT in the evaluation of small coronary stents. In their study, Mahnken et al 14 noted that ACT proved to be superior to MDCT for in vitro visualization of coronary artery stents because the improved spatial resolution of ACT enabled better depiction of the stent lumen.…”

Evaluation of coronary artery in-stent restenosis with prospectively ECG-triggered axial CT angiography versus retrospective technique: a phantom study

“…First, stent lumen visibility is influenced strongly by stent material and diameter, strut thickness and design. Image quality was degraded by stents with thicker struts (>0.14mm) and stents with smaller diameter (3.0 mm) [17,18] .We tested only one type of stent, the Cypher, with a 3-and 3.5-mm inner diameter, 13-and 23-mm length and 0.14-mm strut thickness. Second, artificial restenosis consisted of polypropylene with a homogeneous density of approximately -60 HU, whereas in vivo intimal hyperplasia and atheromatous plaque are often heterogeneous.…”

High-Pitch 128-Slice Dual-Source CT for the Assessment of Coronary Stents in a Phantom Model

“…The evaluation of stent patency is a major issue in the follow-up after stent placement and several studies have demonstrated high diagnostic accuracy of CTCA for the assessment of in-stent stenosis with 64-slice MDCT (19,20) and DSCT (21). However, even with state-of-the-art MDCT systems, the delineation of the coronary stent lumen is challenging because of blooming artifacts caused by the metallic stent struts and highly depends on the stent material and stent size (16).…”