[Validation of optimal coronary angiography angle for the branch form of the left main trunk by use of multi detector computed tomography].
OBJECTIVE
The aim of this study was to derive optimal coronary angiography (CAG) angle for the form information on the left main trunk (LMT) by use of multi detector computed tomography (MDCT).


METHODS
To verify the accuracy of angle measurement with MDCT, the angle of phantom with known angle was compared with MDCT (CT method) and angiography (AG method). The take-off angle of LMT was derived using CT method from 200 cases who underwent cardiac CT in this institution.


RESULTS
In the phantom, both CT and AG methods were indicated to have high accuracy and the errors were very small (0.3%, 0.3%). The take-off mean angle of LMT was 130.7±19.0 degrees in male, and 139.1±19.3 degrees in female. The optimal CAG angle was indicated at left anterior oblique (LAO) 41 degrees (male) and LAO 49 degrees (female).


CONCLUSIONS
The optimal CAG angle of LMT was derived from the CT method.
Department of Radiological Technologist, Kokura Memorial Hospital, Japan.
Tatsunori
T
Saho
Hideo
H
Onishi
Yoshitaka
Y
Nakamura
Ryoji
R
Ichinose
Tomoaki
T
Itou
Takenori
T
Domei
Kisaki
K
Amemiya
Itsuo
I
Yuda
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D017023:Coronary Angiography / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D061330:Multidetector Computed Tomography / Q000379:methods*; D062645:Percutaneous Coronary Intervention; D019047:Phantoms, Imaging; D012680:Sensitivity and Specificity; D025321:Surgery, Computer-Assisted; D055815:Young Adult