Detailed Head & Neck
CT angiography
at low dose

“With Revolution CT, faster head and neck angiography allows for uniform contrast in pure arterial phase, with no venous contamination. Therefore, it gives us the imaging accuracy that we need to provide a confident diagnosis to referring clinicians.”

Laurent Macron
Radiologist at Centre Cardiologique du Nord, Saint-Denis, France

Clinical Case

Patient History 

A man in his 70s is referred to CT for follow-up of a stenosis of the right internal carotid.


  • Helical mode

  • Pitch 0.992:1

  • kV Assist & SmartmA to tailor dose to patient’s morphology: 120 kV, 35-320 mA, Noise Index 25

  • BMI: 26

  • ASiR*-V1 to lower dose

  • 0.5 sec rotation speed

  • 50 cc of contrast media (350 mg I/mL) – including SmartpPep phase (automated threshold-based triggering)

  • DLP 175 mGy-cm

  • 0.29 mSv2

  • Coverage : 300 mm

  • Acquisition time : 1.9 seconds



This head and neck angiography was performed in less than two seconds with high-resolution images at less than one 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, allowing you to 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% 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.