The Aquilion One

Neurology

Arizona locations only

The Aquilion ONE CT scanner shows not only whole organ anatomy, but also the changes in the entire organ over time resulting in a better, faster, more complete diagnosis.

In addition, the Aquilion ONE can perform a comprehensive neurological
examination providing arterial, venous and whole brain perfusion in a single
study with both less contrast and radiation dose…

Currently, conventional diagnostic stroke imaging is not optimal. The MRI process requires a minimum of 30 to 40 minutes, which may impact a patient’s treatment options. Although 64-slice CT offers improvements over MR imaging, it is not an ideal solution. That’s because it does not provide a complete picture of brain vasculature, so physicians can not ascertain if brain tissue is viable prior to clot removal or treatment. Dynamic volume CT now fills the gaps to provide a superior platform for state-of-the-art stroke diagnosis and treatment. In addition to delivering superior image quality, the dynamic volume system creates a perfusion map of the entire brain to better inform clinical decision-making. Specifically, physicians can determine whether or not brain tissue is viable. Aquilion ONE provides detailed diagnostic data within minutes, which enables physicians to determine optimal treatment for patients. The system images the entire brain vasculature within one minute to provide physicians the essential data needed to accurately identify which patients will benefit from treatment regardless of how much time has elapsed since the stroke.

The primary limitation of the 64-slice system is coverage; physicians select a 3.2 to 4 cm section of brain rather than the entire brain to create the perfusion map. To cover an entire brain, physicians need the ability to acquire a 12-to-16 cm volume. Consequently, clinical understanding of a patient’s brain perfusion is incomplete with 64-slice CT imaging. 
Dynamic volume CT extends the perfusion range up to 16 cm coverage from skull base to vertex, allowing radiologists to assess the patient for acute stroke and ischemia in areas that remain masked during 64-slice scans. Perfusion imaging is a key component of the protocol. Dynamic volume CT makes it possible for radiologists to pinpoint the exact location of a lesion to direct surgeons to the abnormality.

With the Aquilion ONE, Toshiba SURESubtraction technology provides valuable assistance to clinicians. The feature is predicated on basic subtraction similar to bone subtraction techniques used in digital subtraction angiography. The application automatically subtracts bone from the pre- and post- contrast neuro CT images to save time and provide a clearer view of anatomical structure. These subtracted volumes can be automatically transferred and archived as their own DICOM dataset and allows for rapid assessment of cerebral circulation. Other features automate contrast injection timing, auto-transfer, post-processing to boost technologist efficiency. Prior to automated post-processing tools, technologists could spend 20 to 30 minutes on each case. With automation, the time technologists spend post-processing drops to a few minutes per study.

Aquilion ONE provides additional benefits as well. Image quality can surpass MRI and 64-slice CT in acute stroke patients, many of whom are confused, agitated and moving continuously. In addition, the volume acquisition mode allows sub-second routine brain imaging, which can minimize motion artifact on some sequences. Aquilion ONE whole-brain volume perfusion imaging allows evaluation of blood supply to the entire brain that is not possible on conventional helical scanners, in much less time and with fewer artifacts than MR perfusion.

Imaging Whole Brain Perfusion

Conventional CT and MR Acute Stroke Workup

Exam time: minimum  of 30 to 40 min for MR alone

SPECS:

  • 8-10 mSv radiation dose
  • 100-120 cc CT contrast
  • 40 cc gadolinium MR contrast

NON CONTRAST CT (check for bleed)

CONTRAST CT (limited perfusion)

REVIEW DATA

Patient moves on to MR (if not contraindicated for metal or gadolinium MR contrast)

VS

320 Detector Row CT Acute Stroke Workup

Exam time: less than 4 minutes, 30 seconds

SPECS:

  • 5 mSv radiation dose
  • 50 cc CT contrast
  • No gadolinium MR contrast

AQUILION ONE STROKE PROTOCOL

REVIEW DATA