DICOM images of CEORA and SATI phantom for calcium volume scores acquired using clinical calcium score and partial volume corrected scores.
Gathered results for calcium volume scores on two phantoms and clinical subjects acquired using clinical calcium score and partial volume corrected scores.
Two phantoms containing artificial coronary artery calcifications and 293 subject chest CT
scans were used. The first and second phantom contained nine calcifications and the second phantom contained three artificial arteries with three calcifications of different volumes,
shapes and densities. The first phantom was scanned five times with and without extension
rings. The second phantom was scanned three times without and with simulated cardiac
motion (10 and 30 mm/s). Chest CT scans were acquired without ECG-synchronization
and reconstructed using sharp and soft kernels. Coronary calcifications were annotated
employing the clinically used intensity value thresholding (130 HU). Thereafter, a threshold
separating each calcification from its background was determined using an ExpectationMaximization algorithm. Finally, for each lesion the partial content of calcification in each
voxel was determined depending on its intensity and the determined threshold.
|Datum van beschikbaarheid||10-dec-2018|
|Geografische dekking||The Netherlands|