Heart-Rate Adaptive CT Image Reconstruction

The advent of multislice computed tomography has made coronary artery imaging with computed tomography (CT) a clinical reality. When a CT scanner with 16 detector rows is used, scan times are within the breathholding capabilities of most patients. The latest generation of CT scanners with 64 detector rows has reduced the scan time to 6-10 seconds, which is suitable for examining all but the most severely ill patients. The objective of this newly developed enhanced algorithm for multisegment image reconstruction in diagnostic cardiac computed tomography is to maintain constant image quality over the entire range of clinically relevant heart rates, i.e. from 50 to 140 beats per minute (bpm). Image reconstruction drawing on the raw data of up to five segments from consecutive cardiac intervals improves the theoretical temporal resolution to 35 ms. Numerous studies in cardiac diagnostics employing the basic version of multisegment image reconstruction with and without administration of a beta blocker have been published to date . For motion-free cardiac imaging, the basic requirement in CT image reconstruction is high temporal resolution. The technical implementation of this requirement may follow several different approaches. The adaptive multisegment reconstruction technique is combined with a process by which the optimal systolic and diastolic phases are selected automatically (PhaseXact software).

Fig. 4: Coronary artery reconstruction with a change in heart frequency from 43...
Fig. 4: Coronary artery reconstruction with a change in heart frequency from 43 to 100 bpm (Scan protocol: 120 kV, 400mA, 0.4 s/rot., 64 x 0.5 mm, pitch 0.175, scan time 10 s). (Data courtesy of Juntendo University Hospital, Tokyo, Japan)

This article was first published in the VISIONS, issue 11/2007, a publication of Toshiba Medical Systems

29.08.2007

More on the subject:More on companies:
Read all latest stories

Related articles

Photo

sponsored solution

Vitrea Advanced Visualization

Vitrea software is a multi-modality advanced visualization system providing comprehensive applications in a variety of IT environments – from single site to multi-site standardization. Vitrea…

Photo

Medics on the move

Healthcare goes out and about

New technology being deployed across the NHS in central England is helping to deliver more secure mobile systems for healthcare professionals. The partnership between Toshiba and the Birmingham…

Photo

Experts' get-together

Toshiba Medical invites you to their MRI User Meeting 2017

Toshiba Medical proudly announces its 2nd MRI User Meeting in collaboration with Clinica Creu Blanca in Barcelona on 22 & 23 September 2017 (at Camp Nou FC Barcelona, Spain). At this MRI User…

Related products

Canon – Aceso

DR

Canon – Aceso

Canon Medical Systems Europe B.V.
Canon – Adora DRFi

Flatpanel Fluoro

Canon – Adora DRFi

Canon Medical Systems Europe B.V.
Canon – Adora DRi

DR

Canon – Adora DRi

Canon Medical Systems Europe B.V.
Canon – Advanced intelligent Clear-IQ Engine for MR

Artificial Intelligence

Canon – Advanced intelligent Clear-IQ Engine for MR

Canon Medical Systems Europe B.V.
Canon – Alphenix 4D CT

Multi Modality Suites

Canon – Alphenix 4D CT

Canon Medical Systems Europe B.V.
Canon – Alphenix Biplane

Bi-Plane

Canon – Alphenix Biplane

Canon Medical Systems Europe B.V.