Tobias M Seyfarth

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Cardiac multi-detector-row computed tomography (MDCT) angiography has shown high levels of sensitivity and especially negative predictive value regarding the diagnosis of coronary artery disease (CAD). This study was designed to determine the value of a 64-slice-MDCT scanner in comparison to invasive coronary angiography for the detection of CAD in a(More)
To evaluate the performance of experienced versus inexperienced radiologists in comparison and in consensus with an interactive computer-aided detection (CAD) system for detection of pulmonary nodules. Eighteen consecutive patients (mean age: 62.2 years; range 29–83 years) prospectively underwent routine 16-row multislice computed tomography (MSCT). Four(More)
OBJECTIVE The purpose of the present study was to measure absolute concentrations of phosphocreatine (PCr) and adenosine triphosphate (ATP) in normal, hypertrophied, and failing human heart. BACKGROUND Conflicting evidence exists on the extent of changes of high-energy phosphate metabolites in hypertrophied and failing human heart. Previous reports using(More)
The purpose of this study was to evaluate the performance of a computer-assisted diagnostic (CAD) tool using various reconstruction slice thicknesses (RST). Image data of 20 patients undergoing multislice CT for pulmonary metastasis were reconstructed at 4.0, 2.0 and 0.75 mm RST and assessed by two blinded radiologists (R1 and R2) and CAD. Data were(More)
Human cardiac 31P nuclear magnetic resonance (NMR) spectra are usually quantified in relative terms, i.e., the ratio of metabolite signals is calculated. If 31P NMR spectroscopy of the heart is to emerge as a clinically relevant diagnostic modality, reliable quantification of absolute concentrations of 31P metabolites is required. We applied spectral(More)
AIM To evaluate prospectively the influence of pulmonary nodule characteristics on detection performances of a computer-aided diagnosis (CAD) tool and experienced chest radiologists using multislice CT (MSCT). MATERIALS AND METHODS MSCT scans of 20 consecutive patients were evaluated by a CAD system and two independent chest radiologists for presence of(More)
PURPOSE To compare the use of a new 64-slice computed tomography (CT) scanner with 16-slice CT in the visualization of coronary artery stent lumen. MATERIAL AND METHODS Eight different coronary artery stents, each with a diameter of 3 mm, were placed in a static chest phantom. The phantom was positioned in the CT gantry at an angle of 0 degrees and 45(More)
PURPOSE The evaluation of coronary artery stents is a major limitation of cardiac multislice spiral computed tomography (MSCT). The development of flat-panel detector computed tomography (FPCT) with truly isotropic spatial resolution may overcome this limitation. Thus, we evaluated the use of FPCT in comparison to MSCT for the assessment of coronary artery(More)
OBJECTIVE The aim of this study was to compare ECG-gated 64-MDCT with MRI for the assessment of global right ventricular (RV) function from coronary CT angiography data. SUBJECTS AND METHODS Thirty-eight patients (25 men, 13 women; mean age +/- SD, 55.0 +/- 8.8 years) with suspected coronary artery disease underwent contrast-enhanced 64-MDCT (64 x 0.6 mm,(More)
Zielsetzung: Mit einer linksventrikulären Hypertrophie einhergehende Herzvitien führen zu Veränderungen des kardialen Energiestoffwechsels, die mit der 31P-MR-Spektroskopie nichtinvasiv erfasst werden können. Ziel der vorliegenden Studie war es, zu untersuchen, ob nach chirurgischem Klappenersatz eine Normalisierung des Energiestoffwechsels beobachtet(More)