Portable real-time 3-D ultrasound for brain scans

USA - 3-D ultrasound technology developed at Duke University provides images of the brain vessels in real-time, which could be miniaturised in coming years for use in ambulances. In an initial pilot study, the system has passed the proof-of-principle.

The researchers used a matrix phased-array transducer to scan a 65-90 pyramid, producing up to 30 volumetric scans per second. A way was found to compensate for different skull thicknesses, which, if uncorrected, might result in poor resolution and contrast. The ultrasound transducer must be held motionless for 20 seconds while data on the echoes passing through bone are processed. The team predicts that future systems should reduce the required time to under a second.
Doppler imaging was performed before and after administering a microbubble contrast agent to 17 healthy volunteers. Their heads were scanned with the ultrasound transducer placed on each temple. Nine more volunteers were examined from the neck base up.
A vascular sonographer and a neurologist reviewed the images
for independent evaluations. They detected the vessels on the side in 71% of the cases and the complete vessel circle in 51%. They also identified the entire vertebrobasilar circulation in 22% and the basilar artery in 44% of the nine volunteers.
To determine the diagnostic value for transcranial ultrasound, the team now plans to test the image correction technique in more volunteers. Additional studies are envisaged to asses the sensitivity and specifity
of contrast-enhanced, real-time 3-D transcranial ultrasound compared with either digital subtraction angiography or MR angiography.

19.11.2008

More on the subject:
Read all latest stories

Related articles

Photo

False appendicitis alarm

Study reveals many unnecessary appendix surgeries in children

Surgery for appendicitis is the most common emergency operation in children. A new study has found that the UK has the highest reported national rate of ‘normal appendicectomy,’ where children…

Photo

Finding the frequency

Ultrasound selectively damages cancer cells (with the right settings)

Doctors have used focused ultrasound to destroy tumors in the body without invasive surgery for some time. However, the therapeutic ultrasound used in clinics today indiscriminately damages cancer…

Photo

POCUS in Basque Country

Spreading point-of-care ultrasound across northern Spain

The rapid scanning and dynamic imaging capabilities offered by point-of-care ultrasound make it an invaluable tool for emergency medicine. Dr Enrique Ortiz Villacian (from Emergency Services at…

Related products

Canon – Aplio 300

Ultrasound

Canon – Aplio 300

Canon Medical Systems Europe B.V.
Canon – Aplio 400

Ultrasound

Canon – Aplio 400

Canon Medical Systems Europe B.V.
Canon – Aplio 500

Ultrasound

Canon – Aplio 500

Canon Medical Systems Europe B.V.
Canon – Aplio a450

Ultrasound

Canon – Aplio a450

Canon Medical Systems Europe B.V.
Canon – Aplio a550

Ultrasound

Canon – Aplio a550

Canon Medical Systems Europe B.V.
Canon – Aplio i600

Ultrasound

Canon – Aplio i600

Canon Medical Systems Europe B.V.