Related Experiment Video
Updated: Apr 15, 2026
Imaging In-Stent Restenosis: An Inexpensive, Reliable, and Rapid Preclinical Model
Published on: September 14, 2009
Assessment of In-Stent Restenosis Using High-Definition Computed Tomography With a New Gemstone Detector
Takuma Tsuda1, Hideki Ishii, Satoshi Ichimiya
1Department of Cardiology, Nagoya University Graduate School of Medicine.
Insights
High-definition computed tomography (HDCT) effectively assesses in-stent restenosis (ISR), especially for thick-strut stents smaller than 3 mm in diameter. This new gemstone detector technology shows high accuracy for ISR detection.
Area of Science:
- Cardiovascular Imaging
- Medical Diagnostics
- Radiology
Background:
- Limited data exists on the accuracy of high-definition computed tomography (HDCT) for detecting in-stent restenosis (ISR).
- Assessing ISR is crucial for managing coronary artery disease post-stenting.
Purpose of the Study:
- To evaluate the accuracy of HDCT with a new gemstone detector for ISR detection.
- To compare HDCT diagnostic accuracy against invasive coronary angiography.
Main Methods:
- 162 patients with 316 stents were analyzed for image quality (IQ) and assessability.
- Factors like stent strut thickness and diameter were examined for their impact on IQ and assessability.
- HDCT findings were compared with invasive coronary angiography results.
Main Results:
- HDCT assessed 88.0% of the 316 stents.
- Higher IQ scores were observed for stents with a diameter ≥3 mm compared to <3 mm, irrespective of strut thickness.
- Stent assessability was significantly higher for diameters ≥3 mm only in thick-strut stents.
Conclusions:
- In-stent lumens demonstrate high assessability with HDCT.
- HDCT is a valuable tool for evaluating thick-strut stents, particularly those with diameters <3 mm.
Background:
Until now, there have been few reports on the accuracy of in-stent restenosis (ISR) detection using high-definition computed tomography (HDCT). The purpose of this study was to assess ISR using HDCT with a new gemstone detector and to examine the diagnostic accuracy compared with invasive coronary angiography.
Methods And Results:
We evaluated 162 consecutive patients with 316 stents and the image quality (IQ) scores used to assess ISR, and analyzed whether stent strut thickness and diameter affected IQ score and assessability. In the 316 stents, 278 were diagnosed as assessable with HDCT (88.0%). IQ score for stent diameter ≥3 mm was significantly higher than that for stent diameter <3 mm, for stents with both thick struts ≥140 μm in thickness (mean IQ: 2.04±0.97 vs. 2.83±1.06, P<0.001) and thin struts <140 μm (mean IQ: 1.92±0.87 vs. 2.64±0.96, P=0.01). Assessability for stent diameter ≥3 mm was significantly higher than that for stent diameter <3 mm only for stents with thick struts (92.8% vs. 76.1%, P<0.001). Stent strut thickness, however, was not statistically significantly associated with either IQ score or assessability.
Conclusions:
In-stent lumens have high HDCT assessability, and HDCT is useful to evaluate thick-strut stents with diameter <3 mm.
More Related Videos
Related Concept Videos
01:28Imaging Studies for Cardiovascular System V: CT
01:25Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT