Heart segmentationDeep learningActive shape modelCTThe anatomical delineation of heart cavities in CT scans is a well-known problem with extended applications in cardiopulmonary diseases. A common approach to provide multi-cavity segmentations is the use of atlas-based statistical shape models. This ...
When imaging a compact structure, such as a calcium deposit in a patient's heart, a slow scan (e.g., less than approximately 6 rpm) CT data acquisition is performed, wherein data is continuously but sparsely acquired during around a 360掳 revolution around the patient. Arc segments are ...
Computed tomography (CT) scanning techniques designed to visualize the beating heart utilize the electrocardiogram (ECG) waveform to gate or select the phase of the cardiac cycle being imaged. Most such methods require that each slice to be imaged be scanned many times to obtain the usual number...
flip angle = 50°, TR/TE = 3.5/1.7 ms, resolution = 2 mm isotropic, FOV = 350 × 350 × 90–120 mm3, number of coil elements = 28, number of spiral interleaves = 5000–7000 depending on the number of slices covering the heart, 14 readouts per spiral interleave, scan time = 4–...
Coronary artery calcium (CAC) is determined using a chest CT with either a cardiac-gated electron beam or a multidetector CT system and quantified using the Agaston score. In the German Heinz Nixdorf Recall Study 4,129 subjects free of coronary heart disease were followed for a median of 5 ...
to the STS National Adult Cardiac Surgery Database as any confirmed new neurological deficit of abrupt onset caused by a disturbance in blood supply to the brain that did not resolve within 24 h, and which included additional detection of a new lesion by a computed tomography scan of the ...
We found that navigator-gated or breath-held multi-slice R2* MRI for HIC determination measures R2* values comparable to the biopsy-validated single-slice, single breath-hold scan. We conclude that these three R2* methods can be interchangeably used in existing R2*-HIC calibrations. ...
The CT scanner detector collimation width was 0.625 mm, detector coverage was 40 mm, and the slice thickness was 0.625 mm. Gantry rotation time was 0.35 sec and the scan pitch was 0.16-0.2 depending on heart rate. The tube voltage was fixed at 100 kVp and 120 kVp for patients with a ...
Eight female 7–12 week-old C57BL/6 mice (Scanbur) were used for this study. The mice were anaesthetized with isoflurane and decapitated. Dorsal root ganglia (DRG) were dissected from all spinal levels and enzymatically digested with collagenase (250 CDU/ml) for 15 min, and then trypsin...
the authors made an additional observation that nimodipine was more efficacious in patients with evidence oftraumatic subarachnoid hemorrhage(determined from their initial CT scan). Perhaps these data are not surprising given the known benefit of L-type VGCC antagonism on spontaneous...