内容紹介
超高精細CTは、従来のCT装置と比較して空間分解能が向上したCT装置である。石灰化はより小さく描出できることで、より詳細な冠動脈内腔評価が可能となる。ステント留置後病変でも、従来のCTよりも小径のステントの評価が可能となる。超高精細CTの臨床的な有用性は高く、不要な侵襲的冠動脈造影を減らせると期待できる。
Limitation of coronary computed tomography angiography (CTA) includes false positive of stenosis at calcified lesions and assessment of in-stent patency. A ultra-high resolution CT (U-HRCT: 1792channels and 0.25mm slice thickness x 160 row) with improved spatial resolution was developed. Compared to conventional resolution CT, assessment of stenosis grading at calcified lesions improved using U-HRCT;U-HRCT showed less artifact at calcified lesions. At stented lesions, assessability of in-stent lumen was visually evaluated. On U-HRCT, 80% of 2.5mm stents were regarded as assessable. U-HRCT visualized calcified lesions with less artifact. The in-stent lumen of stents with diameter ≥2.5 mm was assessable on U-HRCT.
目次
Limitation of coronary computed tomography angiography (CTA) includes false positive of stenosis at calcified lesions and assessment of in-stent patency. A ultra-high resolution CT (U-HRCT: 1792channels and 0.25mm slice thickness x 160 row) with improved spatial resolution was developed. Compared to conventional resolution CT, assessment of stenosis grading at calcified lesions improved using U-HRCT;U-HRCT showed less artifact at calcified lesions. At stented lesions, assessability of in-stent lumen was visually evaluated. On U-HRCT, 80% of 2.5mm stents were regarded as assessable. U-HRCT visualized calcified lesions with less artifact. The in-stent lumen of stents with diameter ≥2.5 mm was assessable on U-HRCT.