Phillips brilliance series

Helical CT was performed using a 64-multidetector CT scanner (Phillips Brilliance Series; Phillips Medical Systems, Best, the Netherlands) with patients in the supine position. A CT scan was performed both 1 week and 3 months after LT. The scans were calibrated to include both lungs completely. The patients were instructed to hold their breath during deep inspiration. Each image series was assessed for proper quality and adherence to the protocol. Post-processing of the images was performed using software at an independent workstation (3D slicer) [18 (link)]. This software enables automatic segmentation of the lungs based on a threshold density of − 750 HU and a region of interest, thereby revealing 3D volume-rendered images. The trachea, up to the level of the thoracic inlet, was included in the volume measurements. Manual segmentation was additionally performed if misclassification of the digestive tract occurred. Split lung volumetric assessment was performed using manual segmentation, separating the two lungs down the midline of the trachea. The lung volumes were calculated automatically by the software as the sum of the volumes of voxels included in the segmentation.