Acta Academiae Medicinae Sinica

Acta Academiae Medicinae Sinica

Acta Academiae Medicinae Sinica ›› 2006, Vol. 28 ›› Issue (1): 32-35.

• Original Articles • Previous Articles     Next Articles

Assessment of Coronary Stent Lumen Visibility and Patency
by 64-slice Spiral CT Angiography

KONG Ling-yan;JIN Zheng-yu;WANG Yi-ning;SONG Lan;ZHANG Zhu-hua;ZHANG Li-ren;ZHANG Shu-yang;LIN Song-bai;WANG Yun;ZHAO Wen-min

  

  1. Department of Radiology,PUMC Hospital,CAMS and PUMC,Beijing 100730,China

  • Received:2005-10-09 Revised:1900-01-01 Online:2006-02-28 Published:2006-02-28
  • Contact: JIN Zhengyu

Abstract: ABSTRACTObjective To evaluate the clinical value of assessment of coronary stent patency by 64-slice spiral CT coronary angiography. Methods Totally 29 patients (59 stents) were investigated using a retrospective ECG-gated enhanced scan by 64-slice spiral CT at a mean interval of (28.4±21.2) months after coronary stent implantation. Axial multi-planar reconstruction (MPR) of the stents and curved-planar reconstruction (CPR) through the stents were evaluated for image quality on a 5-point scale (1=excellent,5=uninterpretable) and lumen diameter. Stent lumen diameter was compared with the vessel diameter proximal of the stents to assess the in-stent lumen visibility. Conventional coronary angiography was performed in 5 patients,and 9 stents were evaluated. Results The image quality was good to excellent on average (scores:1.94±0.84),depending on heart rate,breath movement,and stent location. Stent lumen was visible,on average a percentage off (76.1±11.1)% of the lumen diameter. All the 9 stents were correctly detected as being patent,which was confirmed by conventional coronary angiography. Conclusion 64-slice spiral CT is a useful tool to assess the coronary stent patency.

Key words: Key words:X-ray computed tomocrapdy, coronary artery diseases, stent, restenosis