Apex of the lungs through the diaphragm
Scan Comments: This protocol was created using the Siemens DSXXL_Chest_PainECG scan parameters, which allows for the temporal resolution to be adjusted even after the scan has been completed. Increasing the resolution times will allow for a reduction in image noise at the expense of increased cardiac motion. All scans are performed using the ALARA principle. A 3D Post Processing is performed with this protocol.
Care Dose Reference mAs
Average Acquisition Time
128 x 0.6mm
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. CareDose is used to reduce patient dose.
Window Width and Level
Reconstruction Comments: A 1.0mm x 0.6mm 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/aorta will increase spatial resolution of the coronary vessels. Iterative reconstructions are performed to improve image noise. Coronal and sagittal image reconstructions are also performed.
Comments: Bolus tracking is used ideal with a 230HU trigger value on the ascending aorta. A saline flush can be used to soften the SVC and limit beam hardening artifact.