Acquisition Phase | Phase Included | Scan Delay | Respiration Phase | Anatomical Coverage |
Non Contrast | N/A | N/A | N/A | N/A |
Arterial Phase | N/A | N/A | N/A | N/A |
Venous Phase | Yes | 60 sec | Inspiration | Diaphragm through pubic symphysis |
Delayed Phase | N/A | N/A | N/A | N/A |
Scan Comments: The specific acquisition phase, scan range, and delay time will be dependent on the region of interest and pathology in question. This protocol is specifically used when fast scan times are needed to limit patient motion (involuntary, cardiac, or breathing). All scans are performed using the ALARA principle. | ||||
Technical Parameters | Parameters |
kVp | 120 |
Effective mAs | Use dose reduction software |
Care Dose Reference mAs | 200 |
Time (Rotation) | 0.28 sec |
Average Acquisition Time | 2-3 sec |
Collimation | 128 x 0.6mm |
Pitch Value | 2.0 |
Scan Direction | Craniocaudal |
Comments: Dose reduction software is used to reduce patient dose. We prefer to keep the pitch lower (less than 2.5) when scanning through the abdomen. This will avoid increased image noise or spiral artifact while still minimizing both cardiac and breathing motion. | |
Reconstruction Parameters | Soft Tissue | Thin Data | Lung | Coronal |
Slice Thickness | 3 mm | 0.75 mm | 3 mm | 3 mm |
Reconstruction Spacing | 3 mm | 0.5 mm | 3 mm | 3 mm |
Reconstruction Algorithm | I40f (2) | I26f (2) | I70f (2) | I40f (2) |
Window Width and Level | 410/10 | 410/10 | 1600/-500 | 410/10 |
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 | ||
Slice Thickness | 3 mm | ||
Reconstruction Spacing | 3 mm | ||
Reconstruction Algorithm | I40f (2) | ||
Window Width and Level | 410/10 | ||
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 | Depends on region of interest and pathology |
Oral Contrast | Depends on region of interest and pathology |
Contrast Volume | Depends on region of interest and pathology |
Comments: N/A | |