Brilliance ict 256 slice spiral ct

CT scans of patients from The First Affiliated Hospital of Fujian Medical University were performed on one of the two CT systems (Toshiba: Aquilion CXL 64-slice CT, Aquilion PRIME 80-slice CT). CT scans of patients from Fujian Provincial Cancer Hospital were performed on Philips Brilliance iCT 256-slice Spiral CT. The acquisition and reconstruction parameters were illustrated in Table 1. Interpretation of CT images was done on a lung window (L, − 500; W, 1500) by using a workstation on picture archiving and communication system.
Table 1

The acquisition and reconstruction parameters of different CT images

Parameters	The First Affiliated Hospital of Fujian Medical University		Fujian Provincial Cancer Hospital
	Toshiba: Aquilion CXL 64-slice CT	Toshiba: Aquilion PRIME 80-slice CT	Philips Brilliance iCT 256-slice Spiral CT
Tube voltage	120KV
Tube current	Automatic tube current modulation:100-400mA
Exposure Time	0.500s	0.500s	0.432s
Detector collimation	64 × 0.625 mm	80 × 0.5 mm	128 × 0.625 mm
Reconstruction thickness	1.0 mm	1.0 mm	2.0 mm
Slice interval	1.0 mm	1.0 mm	1.0 mm
Pitch	0.813	0.813	0.763
Field of view	L	L	L
Matrix	512 × 512	512 × 512	1024 × 1024
Convolution Kernels	FC51	FC51	YA
Voxel size	0.702 mm×0.702 mm×1 mm	0.702 mm×0.702 mm×1 mm	0.684 mm×0.684 mm×2 mm

All CT scans were acquired during a single breath-hold in cooperative children or during quiet respiration in children unable to suspend respiration, and those who could not cooperate were sedate by oral administration of 10% chloral hydrate (0.5 ml/kg, body weight) before examination. All abdominal three-phase CT scans, including non-enhanced phase (NP), arterial phase (AP), and venous phase (VP), were performed on Lightspeed VCT 64-slice spiral CT (GE Healthcare, USA) scanner or Brilliance ICT 256-slice spiral CT (Philips, Netherlands) scanner. The CT scanning parameters were (1) tube voltage: 120 kV; (2) tube current: 200 mAs; (3) pitch: 0.984:1; (4) slice thickness: 5.0 mm; (5) slice interval: 5.0 mm; (6) reconstructed slice thickness: 1.25 mm. Nonionic iodinated contrast material (Omnipaque 300 mg I/mL or Visipaque 320 mg I/ml, GE Healthcare) was used. Contrast material (2 ml/kg, body weight) was injected into peripheral vein of the forearm with a power injector at a rate of 1–3 ml/s. AP and VP of post-contrast scanning were performed at 20–35 and 60–70 s respectively after contrast material administration.

Before the CT examination, the guardians of the patients provided informed consent for the potential adverse reactions to contrast medium and exposure to radiation. The images were acquired with Lightspeed VCT 64-slice spiral CT (GE Healthcare, USA) and Brilliance ICT 256-slice spiral CT (Philips, Netherlands) by using the following parameters: tube voltage, 90–120 kV; automatic tube current, 60–100 mAs; pitch, 0.984; slice thickness, 5.0 mm; and slice interval, 5.0 mm. The patients were scanned in the supine position from the neck to the diaphragm. A contrast agent (Omnipaque, GE Healthcare, USA) was injected during the scan into the scalp vein or elbow vein of the patient at 300–350 mg/ml at 2–5 ml/s, dosage of 2.0 ml/kg. The children under 5 years old were sedated with contrast agent (0.5 ml/kg). The post-processing methods in the CT scanner included multiplanar reconstruction and three-dimensional volume rendering. All images were reconstructed with 1.25 mm slice thickness with a 0.625 mm slice interval. Multi-directional and multi-angle reconstruction images were used to evaluate the heart structure and origin of the blood vessels.