Rapid and Precise Coronary
CT Angiography

"Thanks to the one-beat axial acquisition, the new iterative reconstruction technology ASiR-V and the high image quality at low kV, Revolution CT delivers cardiac CT with excellent image quality at very low dose routinely.”

Jacques Feignoux
Radiologist at Centre Cardiologique du Nord, Saint-Denis, France

Clinical Case

Patient History

A woman in her 60s with multiple risk factors and complaining about atypical chest pain was referred to CT for coronary assessment.

Acquisition

    One-beat cardiac acquisition:

    • 120 mm axial scanning with ECG gating

    • kV Assist & SmartmA to tailor dose to patient’s morphology: 80 kV, 370 mA, Noise Index 30

    • BMI: 23

    • ASiR*-V1 to lower dose

    • 0.28 sec rotation speed

    • Heart rate: 69 BPM

    • 60 cc of contrast media (350 mg I/ml) – including SmartPrep phase (automated threshold-based triggering)

    • DLP 18 mGy-cm

    • 0.25 mSv2

    • Exposure time: 0.28 sec



Results


Conclusion

On this patient with a relatively high heart rate (77 BPM before apnea, 69 BPM during acquisition), the exam was performed within a single diastolic phase, at 80 kV, enabling diagnostic quality images to be acquired at a quarter of a milliSievert.


Enabling Technologies

  • Revolution CT puts the next generation of iterative reconstruction, ASiR-V, up to 160 mm of multivolume axial scanning and up to 80 mm collimation for helical scanning in your hands, helping you acquire high-definition images at lower doses. 

  • ASiR-V1 was designed to deliver reduced noise levels and improve low-contrast detectability so you can routinely reduce dose up to 82% relative to FBP at the same image quality3 for patients of all ages. 

  • Revolution CT introduces the groundbreaking Gemstone Clarity Detector that gives you 160 mm whole organ coverage with best-in-class spatial resolution. The focally-aligned, miniaturized detector modules and 3D collimator are designed to reduce electronic noise by 25% which may improve image quality and reduce artifacts in low signal conditions, for example in large patients or when scanning at low kV and mA. 

  • Revolution CT features also the latest Smart Dose technologies designed to help you acquire high quality images using lower doses of radiation. Smart Dose technologies may help you make a more accurate diagnosis and lower exposure for patients across routine and advanced exams, including dynamic acquisitions for perfusion and 4D studies. Smart Dose technologies include kV Assist that helps you select the right settings for the patient being scanned. It recommends tube voltage and current to achieve the lowest dose while meeting your image quality goals. 

  • Finally, Revolution CT allows 70 kV scanning so you can develop low-dose protocols, which are especially suitable for pediatric imaging.

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Related

Footnote

Downloads

Revolution CT - Low Dose Clinical Cases

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  • Date Created 11/13/2014
  • DocID JB25620XXa