A 3 phase variable helical pitch (vHP) CT scan was performed in this male patient (HP 65-19-65). vHP combines gated and non-gated scan modes allowing contrast and radiation dose reduction. In this case the scan was non-gated/ gated/ non-gated. The patient's HR registered was 51 bpm. 3D Volume Rendered and Multiplanar Reconstruction (MPR) demonstrates no large vessel calcifications. No plaques or stenosis were found in the Right Coronary Artery (RCA) and in the Circumflex Coronary Artery (Cx). A myocardial bridge is seen in the Left Anterior Descending (LAD).
*AAPM Report 96; k-factor 0.0145
Scan Mode | vHP |
Collimation | 0.5 mm x 80 |
kVp | 100 |
mAs | SURE Exposure |
Rotation Time | 0.35 s |
Scan Range | 614.0 mm |
Dose Reduction | AIDR 3D |
CTDlvol | 8.4 mGy |
DLP | 566.2 mGy·cm |
Effective Dose* | 8.2 mSv |
An iodinated contrast enhanced Abdominal and Pelvic CT was performed with SUREPosition. It provides the ability to move the patient to the iso-center, without physically re-centering and re-scanning the patient. The scanner generates a new virtual scanogram with the corrected patient position. A hybrid FC was used in the protocol allowing optimized lung, bone and body visualization. Multiplanar Reconstruction (MPR) demonstrate calcifications in the aortic and iliac arteries. Spine osteophytes formation are also seen in the axial bone images.
*AAPM Report 96; k-factor 0.015
Scan Mode | vHP |
Collimation | 0.5 mm x 80 |
kVp | 100 |
mAs | SURE Exposure |
Rotation Time | 0.5 s |
Scan Range | 454.4 mm |
Dose Reduction | AIDR 3D |
CTDlvol | 6.7 mGy |
DLP | 337.6 mGy·cm |
Effective Dose* | 5.06 mSv |
A SURESubtraction Abdominal Aortic CT scan was performed with AIDR 3D, Adaptive Iterative Dose Reduction. SURESubtraction scan improves the angiography workflow; the non-contrast and contrast scan are linked for faster set-up. During the reconstruction process, it automatically subtracts the bone, reconstruct types of images as requested and transfer the final images to the destination. 3D Volume Rendered, Maximum Intensity Projection (MIP), Curved Multiplanar Reconstruction (cMPR) and axial images demonstrate infrarenal aortic aneurysm with thrombus in lumen.
*AAPM Report 96; k-factor 0.015
Non-Contrast | |
Scan Mode | Ultra-Helical |
Collimation | 0.5 mm x 80 |
kVp | 120 |
mAs | SURE Exposure |
Rotation Time | 0.5 s |
Scan Range | 422.0 mm |
Dose Reduction | AIDR 3D |
CTDlvol | 3.6 mGy |
DLP | 169.1 mGy·cm |
Effective Dose* | 2.5 mSv |
Arterial Phase | |
Scan Mode | Ultra-Helical |
Collimation | 0.5 mm x 80 |
kVp | 120 |
mAs | SURE Exposure |
Rotation Time | 0.5 s |
Scan Range | 422.0 mm |
Dose Reduction | AIDR 3D |
CTDlvol | 3.6 mGy |
DLP | 169.1 mGy·cm |
Effective Dose* | 2.5 mSv |
64-year-old male, a low dose scan of the chest was performed for lung nodule investigation. AIDR 3D, Adaptive Iterative Dose Reduction was automatically applied to the scan to improve image quality while lowering the radiation dose. Lung nodules are seen in the Multiplanar Reconstruction (MPR).
*AAPM Report 96; k-factor 0.014
Scan Mode | Ultra-Helical |
Collimation | 0.5 mm x 80 |
kVp | 120 |
mAs | SURE Exposure |
Rotation Time | 0.5 s |
Scan Range | 324 mm |
Dose Reduction | AIDR 3D |
CTDlvol | 1.3 mGy |
DLP | 48.4 mGy·cm |
Effective Dose* | 0.67 mSv |
A female patient presented with chest pain and shortness of breath. An iodinated contrast enhanced Chest CT was performed with SUREkV and SUREExposure, automated kV and mA selection. Multiplanar Reconstruction (MPR) and curved MPR demonstrate bilateral pulmonary thrombo-embolism. Pulmonary consolidations are also seen bilaterally in the base of the lungs.
*AAPM Report 96; k-factor 0.014
Scan Mode | Ultra-Helical |
Collimation | 0.5 mm x 80 |
kVp | SURE kV 100 |
mAs | SURE Exposure |
Rotation Time | 0.35 s |
Scan Range | 280 mm |
Dose Reduction | AIDR 3D |
CTDlvol | 5.2 mGy |
DLP | 171.2 mGy·cm |
Effective Dose* | 2.3 mSv |
80-year-old female with bilateral joint arthroplasty presented with sudden fever and signs of hip inflammation. A CT scan of the abdomen was performed and automatically reconstructed with SEMAR, Single Energy Metal Artifact Reduction. The SEMAR images reveal an abscess, signal of prosthetic joint infection originally obscured due to the metal artifacts.
*AAPM Report 96; k-factor 0.015
Scan Mode | Ultra-Helical |
Collimation | 0.5 mm x 80 |
kVp | 100 |
mAs | SURE Exposure |
Rotation Time | 0.5 s |
Scan Range | 356 mm |
Dose Reduction | AIDR 3D |
Metal Artifact Reduction | SEMAR |
CTDlvol | 6.5 mGy |
DLP | 292.4 mGy·cm |
Effective Dose* | 4.3 mSv |
73-year-old female presented with shortness of breath. A SURESubtraction Lung CT scan was performed to rule out pulmonary emboli. The color iodine maps were automatically generated and show no perfusion defect. No pulmonary embolus was seen.
*AAPM Report 96; k-factor 0.014
Non-Contrast | |
Scan Mode | Ultra-Helical |
Collimation | 0.5 mm x 80 |
kVp | 100 |
mAs | SURE Exposure |
Rotation Time | 0.35 s |
Scan Range | 280 mm |
Dose Reduction | AIDR 3D |
CTDlvol | 5.5 mGy |
DLP | 179.8 mGy·cm |
Effective Dose* | 2.5 mSv |
Arterial Phase | |
Scan Mode | Ultra-Helical |
Collimation | 0.5 mm x 80 |
kVp | 100 |
mAs | SURE Exposure |
Rotation Time | 0.35 s |
Scan Range | 280 mm |
Dose Reduction | AIDR 3D |
CTDlvol | 6.2 mGy |
DLP | 203.8 mGy·cm |
Effective Dose* | 2.85 mSv |
A large patient presented with abdominal pain. An Abdominal and Pelvic CT scan was performed with iodinated intravenous contrast. Multiplanar Reconstruction (MPR) demonstrate the patient's anatomy.
*AAPM Report 96; k-factor 0.015
Scan Mode | Ultra-Helical |
Collimation | 0.5 mm x 80 |
kVp | 100 |
mAs | SURE Exposure |
Rotation Time | 0.5 s |
Scan Range | 1399.2 mm |
Dose Reduction | AIDR 3D |
CTDlvol | 7.6 mGy |
DLP | 387.1 mGy·cm |
Effective Dose* | 5.8 mSv |
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