Search results for "arteriography"
showing 3 items of 3 documents
Improving diagnostic accuracy of MDCT coronary angiography in patients with mild heart rhythm irregularities using ECG editing
2006
OBJECTIVE. The objective of our study was to compare diagnostic accuracy of MDCT coronary angiography in a population of patients with mild heart rhythm irregularities before and after editing the ECG. SUBJECTS AND METHODS. Thirty-eight patients who underwent MDCT coronary angiography and conventional coronary angiography were enrolled in the study. The inclusion criterion was the presence of mild heart rhythm irregularities (i.e., premature beats; atrial fibrillation; mistriggering; or low heart rate, defined as 40 beats per minute or less) during the scan. All patients underwent MDCT with the following parameters: 16 detectors; collimation, 0.75 mm; gantry rotation time, 375 msec; 120 kV;…
Einfluß von qualitativen Stenosecharakteristika auf die Meßqualität verschiedener QCA-Systeme (Impact of lesion characteristics on the quality of mea…
1997
Die neueren QCA-Systeme weisen bei In-vitro-Messungen eine vergleichbare Reproduzierbarkeit und Genauigkeit der Mesergebnisse auf. Wir untersuchten, welchen Einflus die Morphologie von Koronararterienstenosen und die Bildqualitat auf die Mesergebnisse von drei fuhrenden QCA-Systemen (AWOS, Cardio und CMS) hat. Hierzu wahlten wir 57 Stenosen aus, die eine klinisch reprasentative Verteilung bezuglich des Stenosegrades, verschiedener Lasionscharakteristika und der Bildqualitat aufwiesen. Prozedurale Fehlerquellen wurden, soweit moglich, eliminiert. Drei Untersucher fuhrten je Stenose funf Messungen mit jedem der drei Systeme durch. Bei drei Stenosen war eine Auswertung nicht moglich.
Higher intracoronary attenuation improves diagnostic accuracy in MDCT coronary angiography
2006
OBJECTIVE: The purpose of this study was to investigate whether the amount of intracoronary attenuation influences the diagnostic accuracy of MDCT coronary angiography in the detection of clinically significant stenosis. MATERIALS AND METHODS: One hundred twenty patients in sinus rhythm with suspected coronary artery disease who underwent MDCT of the heart and conventional coronary angiography were retrospectively selected. The population was divided into two groups depending on median (326 H) coronary vascular enhancement (i.e., low attenuation and high attenuation). The diagnostic accuracy of MDCT for the detection of clinically significant coronary artery lesions (> or = 50% lumen reduct…