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 |
Venous Phase | N/A | N/A | N/A | N/A |
Delayed Phase | N/A | N/A | N/A | N/A |
Scan Comments: For larger patients, it is helpful to utilize a DSXXL based scan protocol that allows for the temporal resolution to be adjusted even after the scan has been completed. Increasing the temporal resolution times will allow for a reduction in image noise at the expense of the increased cardiac motion. All scans are performed using the ALARA principle. 3D post-processing is performed with this protocol. |
Technical Parameters | Parameters |
kVp | 120 |
Effective mAs | Use dose reduction software |
Care Dose Reference mAs | 320 |
Time (Rotation) | 0.28 sec |
Average Acquisition Time | HR Dependent |
Collimation | 128 x 0.6mm |
Pitch Value | HR Dependent |
Scan Direction | Craniocaudal |
Comments: Both the pitch and the scan time will vary based upon the patient's heart rate. ECG dose modulation is always performed to limit patient exposure. Dose reduction software is used to reduce patient dose. |
Reconstruction Parameters | Best Phase Heart Mag | Soft Tissue Open Field | Thin Data Open Field | Lung Open Field |
Slice Thickness | 0.75 mm | 3mm | 0.75mm | 3mm |
Reconstruction Spacing | 0.5 mm | 3mm | 0.5mm | 3mm |
Reconstruction Algorithm | B26f ASA | B30f | B20f | B80f |
Window Width and Level | 500/100 | 410/10 | 410/10 | 1600/-500 |
Reconstruction Comments: A 1.0 mm x 0.6 mm multiphase reconstruction is generated across the ECG pulsing range every 5-10% of the R-R interval. An additional smaller DFOV reconstruction that only includes the heart and aorta will increase spatial resolution of the coronary vessels. |
Reconstruction Parameters | Multiphase Heart Mag | Coronal Open Field | Sagittal Open Field |
Slice Thickness | 1 mm | 3mm | 3mm |
Reconstruction Spacing | 0.6 mm | 3mm | 3 mm |
Reconstruction Algorithm | I41f (3) | B30f | B30f |
Window Width and Level | 500/100 | 410/10 | 410/10 |
Reconstruction Comments: A 1.0 mm x 0.6 mm multiphase reconstruction is generated across the ECG pulsing range every 5-10% of the R-R interval. An additional smaller DFOV reconstruction that only includes the heart and aorta will increase spatial resolution of the coronary vessels. |
Contrast Parameters | Parameters |
Contrast Type | Non ionic |
Contrast Volume | 120mL |
Saline Flush | 30mL |
Injection Rate | 5-7 mL/sec |
Oral Contrast | N/A |
Contrast Volume | N/A |
Comments: Bolus tracking is used ideal with a 230 HU trigger value on the ascending aorta. A saline flush can be used to soften the SVC and limit beam hardening artifact. |