Somatom force dual source ct scanner

As part of the standard workup procedure for educational purposes, a total body PMCT was made as soon as possible upon arrival at the department of anatomy, before embalming. Due to personnel or technical difficulties, PMCT scanning was not always possible. During the CT scanning procedure, the arms were crossed over the thoracoabdominal region, in a supine position within a body bag (Fig. 1). Up to June 2015, a Siemens Sensation 64® CT scanner (Siemens Healthineers, Erlangen, Germany) was used with set parameters for 3 mm slice thickness; 3 mm increments; 120 kV tube voltage; 325 mAs tube current; B30f (soft tissue filter) convolution kernel. After June 2015, a Siemens SOMATOM Force® Dual source CT scanner (Siemens Healthineers, Erlangen, Germany) with dual energy capabilities became available. The dual energy scans were made at 100 kV with 750 mAs and Sn 150 kV with 375 mAs. Collimation was 2 × 192 × 0.6 mm, with axial and coronal reconstructions (1 mm Br40 and Qr40 soft tissue filters and 3 mm Br59 bone filters), along with dedicated reconstructions for dual energy post-processing. No clinical autopsy or other invasive post-mortem procedures were performed prior to embalming.Fig. 1

Scanning of study body in a body bag on the Siemens SOMATOM Force® Dual source CT scanner

We purchased 36 commonly used stents from 7 manufacturers and analysed them on the third generation SOMATOM® Force Dual Source CT-Scanner (Siemens, Forchheim, Germany). We used a phantom model measuring 45 cm × 20 cm × 20 cm (height x width x depth) and filled it with water at body temperature (36 °C) (Fig. 1). The model itself and experimental settings had no influence on CT performance and analysis. Stents were fixed with clips, spanned throughout the phantom model and consecutive measurements were performed. Each sample was scanned at various tube potentials of 80 and 150 peak kilovoltage (kVp), 90 and 150 kVp and 100 and 150 kVp. We affixed a calculus of 2 mm in diameter of known chemical composition (calcium oxalate monohydrate; blue on DECT scan) to blue and red stents and repeated measurements.Fig. 1

A container was filled with water at body temperature (36 °C). Stents were fixed with clips at both ends and spanned throughout the phantom model for measurements

The Quanta FEG 250 scanning electron microscope (SEM) with applied voltage ranged from 10 to 15 kV was used to analyze the surface and tensile fracture surface of 3D-C/C composites and 2.5D-C/C composites. The Leica DM 4000 M metallographic microscope was chosen to analyze the cross-sectional characteristics of 3D and 2.5D-C/C composites. AutoPore IV 9500 mercury porosimeter was adopted to analyze the void structure of 3D and 2.5D-C/C composites. The Quantum GX PE micro computed tomography (Micro-CT) was used to analyze the topography of 3D and 2.5D-C/C composites with a scan rate of 72 μm/slice. The samples for tests were 65 × 12 × 3.4 mm in dimension. Medical imaging of materials and their animal implants was performed by Siemens somatom force dual source CT scanner, 1 mm/ slice.