Acquisition Phase | Phase Included | Scan Delay | Respiration Phase | Anatomical Coverage |
Non Contrast | N/A | N/A | N/A | N/A |
Arterial Phase | Yes | Bolus triggered | Inspiration | Lung apices through the diaphragm to include the adrenal glands |
Venous Phase | N/A | N/A | N/A | N/A |
Delayed Phase | N/A | N/A | N/A | N/A |
Scan Comments: A flash spiral mode can be used to improve scan speed and limit breathing artifact if the patient is short of breath. All scans are performed using ALARA principle. |
Technical Parameters | Parameters |
kVp | Care kV (ref. kV 120) |
Effective mAs | Use dose reduction software |
Care Dose Reference mAs | 170 |
Time (Rotation) | 0.28 sec |
Average Acquisition Time | 1-2 sec |
Collimation | 128 x 0.6mm |
Pitch Value | 2.2 |
Scan Direction | Craniocaudal |
Comments: Dose reduction software is used to reduce patient dose. 100 kVp can be used for most average size patients which will significantly reduce patient dose. |
Reconstruction Parameters | Soft Tissue | Thin Data | Lung | Coronal |
Slice Thickness | 3 mm | 0.75 mm | 3 mm | 2 mm |
Reconstruction Spacing | 3 mm | 0.5 mm | 3 mm | 2 mm |
Reconstruction Algorithm | B30f | B20f | B80f | B30f |
Window Width and Level | 550/50 | 550/50 | 1600/-500 | 550/50 |
Reconstruction Comments: When using flash spiral mode, the DFOV is limited by the smaller of the two detector arrays to 33.2cm. This limitation can be overcome by reducing the pitch value to allow for a greater DFOV. |
Reconstruction Parameters | Sagittal | Sliding MIP Axial | |
Slice Thickness | 2 mm | 16 mm | |
Reconstruction Spacing | 2 mm | 3 mm | |
Reconstruction Algorithm | B30f | B50f | |
Window Width and Level | 550/50 | 700/80 | |
Reconstruction Comments: When using flash spiral mode, the DFOV is limited by the smaller of the two detector arrays to 33.2cm. This limitation can be overcome by reducing the pitch value to allow for a greater DFOV. |
Contrast Parameters | Parameters |
Contrast Type | Non-ionic |
Contrast Volume | 80-120 mL |
Saline Flush | N/A |
Injection Rate | 5-6 mL/sec |
Oral Contrast | N/A |
Contrast Volume | N/A |
Comments: Bolus tracking is performed off the pulmonary trunk using a 200 HU trigger setting. |