OBJECTIVES: Multidetector-row computed tomography coronary images are usually analyzed in mid-diastole (MD). Because of slow coronary motion also in end-systole (ES), we evaluated the impact on image quality of including ES images and defined an efficient reconstruction protocol. MATERIAL AND METHODS: In 50 coronary multidetector-row computed tomography studies, 9 reconstructions (at 10% increments of the RR interval) were graded for image quality. Multiple combinations of reconstructions were compared. RESULTS: MD (60-70% of the RR interval) offered the best image quality. In 44% patients, the best reconstruction for >or=1 coronary was found in ES (20-30%). Their heart rate was higher (68.2+/-9.9 bpm vs. 59.2+/-8.8 bpm, P=0.0014). Combining ES and MD consistently offered superior image quality and less nonevaluable vessels than even larger numbers of diastolic reconstructions alone. A combination of 2-3 reconstructions was most efficient. Adding more reconstructions did not significantly improve results. CONCLUSIONS: Combining ES and MD reconstructions reduces nonevaluable coronary arteries, particularly with higher heart rates. A protocol including 2-3 reconstructions is the most efficient.
OBJECTIVES: Multidetector-row computed tomography coronary images are usually analyzed in mid-diastole (MD). Because of slow coronary motion also in end-systole (ES), we evaluated the impact on image quality of including ES images and defined an efficient reconstruction protocol. MATERIAL AND METHODS: In 50 coronary multidetector-row computed tomography studies, 9 reconstructions (at 10% increments of the RR interval) were graded for image quality. Multiple combinations of reconstructions were compared. RESULTS: MD (60-70% of the RR interval) offered the best image quality. In 44% patients, the best reconstruction for >or=1 coronary was found in ES (20-30%). Their heart rate was higher (68.2+/-9.9 bpm vs. 59.2+/-8.8 bpm, P=0.0014). Combining ES and MD consistently offered superior image quality and less nonevaluable vessels than even larger numbers of diastolic reconstructions alone. A combination of 2-3 reconstructions was most efficient. Adding more reconstructions did not significantly improve results. CONCLUSIONS: Combining ES and MD reconstructions reduces nonevaluable coronary arteries, particularly with higher heart rates. A protocol including 2-3 reconstructions is the most efficient.
Authors: Sebastian Leschka; Lars Husmann; Lotus M Desbiolles; Oliver Gaemperli; Tiziano Schepis; Pascal Koepfli; Thomas Boehm; Borut Marincek; Philipp A Kaufmann; Hatem Alkadhi Journal: Eur Radiol Date: 2006-05-13 Impact factor: 5.315
Authors: Georg Mühlenbruch; Ernst Klotz; Joachim E Wildberger; Ralf Koos; Marco Das; Matthias Niethammer; Christian Hohl; Dagmar Honnef; Christoph Thomas; Rolf W Günther; Andreas H Mahnken Journal: Eur Radiol Date: 2006-07-04 Impact factor: 5.315
Authors: A D Furtado; D D Adraktas; N Brasic; S-C Cheng; K Ordovas; W S Smith; M R Lewin; K Chun; J D Chien; S Schaeffer; Max Wintermark Journal: AJNR Am J Neuroradiol Date: 2010-04-01 Impact factor: 3.825
Authors: G Runza; L La Grutta; V Alaimo; L Damiani; A La Fata; F Alberghina; M Galia; G Lo Re; G Luccichenti; T Bartolotta; F Cademartiri; M Midiri; M De Maria; R Lagalla Journal: Radiol Med Date: 2008-07-01 Impact factor: 3.469