[Supporting primary stent implantation by angiographic length measurement].
In this study a procedure for online measurement of a coronary segment length during primary stenting is presented. The spatial segmental axis is calculated from a biplane angiogram and the corresponding projection data by simple delineation of the proximal and distal segment sites in each image. In a clinical evaluation the length error, projectional foreshortening and time frame during measurement of 222 stents or carrier balloons were calculated. The overall percentage length error was 3.3(+)-2.4%. The device length imaged with a mean projectional foreshortening of 18(+)-20% was measured within 18(+)-4 s. The procedure yields the accurate length of coronary segments within a short computation time taking projectional foreshortening into account.
Wunderlich
W
W
Abteilung Innere Medizin II-Kardiologie und Pulmologie, Universitätsklinikum Benjamin Franklin, Freie Universität Berlin, Deutschland. w.wunderlich@medizin.fu-berlin.de
Fischer
F
F
Arntz
H R
HR
Horras
N
N
Schwimmbeck
P
P
Morguet
A J
AJ
Schultheiss
H P
HP
D015906:Angioplasty, Balloon, Coronary / Q000379:methods; D016477:Artifacts; D017023:Coronary Angiography / Q000379:methods*; D023921:Coronary Stenosis / Q000000981:diagnostic imaging / Q000628:therapy*; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods*; D015203:Reproducibility of Results; D015607:Stents