[PDF] Top 20 Image quality in low-dose coronary computed tomography angiography with a new high-definition CT scanner

... CCTA image analysis The image quality of all 186 CCTA scans was interpreted independently by two experienced readers using axial source ...images. Coronary arteries were divided into sixteen ... Voir le document complet

... 32 In addition, patient groups which we generally perceived as most suitable for CTCA are typically younger and have less coronary ...improve image quality and reduce false- positive ...view ... Voir le document complet

... radiation in CTCA is only administered at predefined time points of the cardiac cycle, rather than throughout the entire cardiac cycle as in the helical mode used so ...[3–5], CT as a major ... Voir le document complet

... The new DSCT technology with an excellent temporal resolution and thus improved image quality at higher and variable heart rates makes an administration of beta- blockers before the ... Voir le document complet

... ment, a low-dose CTCA (mean heart rate: 57 per minute with 10 mg metoprolol ...and a low-dose 1-day gated adenosine stress SPECT-MPI with 173 MBq 99m Tc-tetrofosmin ... Voir le document complet

... of image noise, signal to noise ratio and CNR between the two groups were performed using student’s t test for continuous variables with normal distributions and the Mann–Whitney U test for continuous ... Voir le document complet

... for CT protocols may underestimate or overestimate the true radiation exposure to the patient [ 27 ...as a matter of fact, it is not possible to measure the delivered dose within a ... Voir le document complet

... comparable image quality of ultra-low-dose ...resulting in an even lower image noise in ultra-low-dose compared with standard ...CCTA. In ... Voir le document complet

... remains a non-negligible drawback of coronary stenting. Therefore, a reliable non- invasive diagnostic imaging tool for differentiation of in- stent restenosis from progression of CAD ... Voir le document complet

... After a delay of 45 – 60 min, the ECG-gated stress images were ...Then, a three-fold higher dose 99m Tc-tetrofosmin was administered followed by a delay of 45 – 60 min before acquisition of ... Voir le document complet

... with low to intermediate pretest ...is a poor predictor of functionally relevant coronary stenoses [ 6 ...Patients with positive CTCA should undergo further evaluation for obstructive ... Voir le document complet

... of coronary artery ...readers in random order. The randomization was performed with a random generator having equal ...sets a number between 1 and 50 representing the order number the ... Voir le document complet

... Stang A, Gronemeyer D, Seibel R, Mann K, Volbracht L, Siegrist J, Erbel ...associated with increased carotid wall thickness. The Ather- osclerosis Risk in Communities ...Diez-Roux A, Evans GW, ... Voir le document complet

... of a body surface area (BSA)-adapted contrast material (CM) protocol for CTA, which resulted in a comparable coronary contrast enhancement indepen- dent of the individual ...least in ... Voir le document complet

... 0.79 with IR and FBP respectively), while it was almost perfect for the low-dose FBP protocol ...IR in cervical spine CT enhances image quality both quantitatively and ... Voir le document complet

... SPECT in the detection of ischemia was 74% and 91% for MPI by ...individual coronary domi- nance and previous coronary revascularisations are taken into ...sensitive in the detection and ... Voir le document complet

... cardiac computed tomography. A report of the American College of Cardiology Foundation appropriate use criteria task force, the Society of Cardiovascular Computed Tomography, the ... Voir le document complet

... implication In patients referred for CTA, a left dominant coronary artery system was identified as a significant risk factor for MI and ...Particularly in the subgroup of patients ... Voir le document complet

... is high, uninterpre- table images are still encountered in a small percentage of patients owing to motion because of high or irregular heart rates or breath- ing during the ...decrease ... Voir le document complet

... scout image with 100kVp and 35 mA was obtained to define the scan area prior to helical CT ...given in Table 1. All CT scans were operated with 1-s rotation time, 230-mm field of ... Voir le document complet