title: Quantitative multi-modality imaging analysis of a bioabsorbable poly-L-lactic acid stent design in the acute phase: a comparison between 2- and 3D-QCA, QCU and QMSCT-CA.
abstract: OBJECTIVE
  To investigate if three-dimensional (3D) based quantitative techniques are comparable to each other and to explore possible differences with respect to the reference method of 2D-QCA in the acute phase and to study whether non-invasive MSCT could potentially be applied to quantify luminal dimensions of a stented coronary segment with a novel bioabsorable drug-eluting stent made of poly-l-lactic-acid (PLLA).
  
  
  RESULTS
  Quantitative imaging data derived from 16 patients enrolled at our institution in a first-in-man trial (ABSORB) receiving a biodegradable stent and who were imaged with standard coronary angiography and intravascular ultrasound were compared. Shortly, after stenting the patients also underwent a MSCT procedure. Standard 2D-QCA showed significant smaller stent lengths (p < 0.01). Although, the absolute measured stent diameters and areas by 2D-QCA tend to be smaller, the differences failed to be statistically different when compared to the 3D based quantitative modalities. Measurements made by non-invasive QMSCT-CA of implanted PLLA stents appeared to be comparable to the other 3D modalities without significant differences.
  
  
  CONCLUSIONS
  Three-dimensional based quantitative analyses showed similar results quantifying luminal dimensions as compared to 2D-QCA during an evaluation of a new bioabsorbable coronary stent design in the acute phase. Furthermore, in biodegradable stents made of PLLA, non-invasive QMSCT-CA can be used to quantify luminal dimensions.
authors.affiliation: Thoraxcenter, Department of Cardiology, Erasmus MC, Rotterdam, The Netherlands. n.Bruining@erasmusmc.nl
authors.forename: Nico
authors.initials: N
authors.lastname: Bruining
authors.forename: Shuzou
authors.initials: S
authors.lastname: Tanimoto
authors.forename: Masato
authors.initials: M
authors.lastname: Otsuka
authors.forename: Annick
authors.initials: A
authors.lastname: Weustink
authors.forename: Jurgen
authors.initials: J
authors.lastname: Ligthart
authors.forename: Sebastiaan
authors.initials: S
authors.lastname: de Winter
authors.forename: Carlos
authors.initials: C
authors.lastname: van Mieghem
authors.forename: Koen
authors.initials: K
authors.lastname: Nieman
authors.forename: Pim J
authors.initials: PJ
authors.lastname: de Feyter
authors.forename: Ron T
authors.initials: RT
authors.lastname: van Domburg
authors.forename: Patrick W
authors.initials: PW
authors.lastname: Serruys
mesh_terms: D000208:Acute Disease; D000368:Aged; D015906:Angioplasty, Balloon, Coronary; D020099:Coated Materials, Biocompatible; D017023:Coronary Angiography / Q000379:methods*; D003324:Coronary Artery Disease / Q000000981:diagnostic imaging / Q000628:therapy; D005260:Female; D006801:Humans; D019344:Lactic Acid; D008297:Male; D008875:Middle Aged; D011091:Polyesters; D011108:Polymers; D011474:Prosthesis Design; D015607:Stents; D018084:Ultrasonography, Interventional / Q000379:methods*
chemical_list: D020099:Coated Materials, Biocompatible; D011091:Polyesters; D011108:Polymers; D019344:Lactic Acid; C033616:poly(lactide)