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dS-SENSE propels Ingenia's imaging speed

White Paper
MRI NetForum Team Philips Healthcare • Netherlands

Scanning on Ingenia with dS-SENSE is much faster than previous parallel imaging

Ingenia is a champion in parallel imaging, which is enabled by dS-SENSE. The smart design of Ingenia with dS-SENSE provides consistent high quality imaging with faster scanning than before. In addition, digital broadband Ingenia with dStream provides up to 40% higher SNR and accelerates patient management.

Philips pioneered parallel imaging in commercially available MR scanners in 2001. Philips’ SENSE parallel imaging on Achieva and Panorama systems features efficient implementation of the calibration so that the acceleration factor equals the SENSE factor instead of being less.
Ingenia’s dS-SENSE again reduces the calibration time significantly and the reference scan is integrated in the calibration phase. More importantly, Ingenia empowers the use of higher SENSE acceleration factors than previously used in routine clinical practice. This is possible because of Ingenia’s high quality system and coil design.

Why is dS-SENSE so fast?

Several factors contribute to the sensational performance of dS-SENSE on Ingenia. dStream provides higher SNR than analog imaging, which can be traded for speed. The geometry of Ingenia coils is optimized for high SENSE performance: size, location and number of coil elements are made as effective as possible. Data reconstruction has been optimized and the dS-SENSE algorithm is sensitized for the high signal close to the coil elements. All of this has resulted in a geometry factor of up to 2 times better for dS-SENSE compared to previous SENSE.
Furthermore, SmartSelect provides automatic selection of the coil element combination that yields the best result for each selected FOV. This improves workflow by enabling a “connect and go” method of working, and it always provides the best possible SNR for the exam.

 <center> dS-SENSE factor 8 in MRA </center>
dS-SENSE factor 8 in MRA
 <center> dS-SENSE factor 5 in 3D BrainView Dual IR </center> <center> dS-SENSE factor 4, fast imaging reduces motion blurring </center>
dS-SENSE factor 5 in 3D BrainView Dual IR
dS-SENSE factor 4, fast imaging reduces motion blurring

Expoilting the higher acceleration in clinical strategies

In SE or FFE sequences, dS-SENSE can be used to speed up scans, or the speed can be traded for higher resolution. In EPI scanning, where echo train length determines distortion, the feasibility of higher dS-SENSE factors therefore provide Ingenia with improved distortion control. This provides opportunities for new protocol strategies.
For instance, diffusion weighted imaging is usually done in axial orientation to reduce distortion due to B0 inhomogeneity. On Ingenia with dStream and dS-SENSE this can now be a coronal acquisition. In the example below, coronal scanning reduced scan time by a factor of 3 with clearly better image quality than the reformatted coronal view from the axial acquisition.

 <center> Coronal acquisition 2:32 min. <br>
b-value 1000, SENSE factor 5 </center> <center> Arial acquisition (reformat) 7:53 min. <br>
b-value 1000, SENSE factor 5 </center>
Coronal acquisition 2:32 min.
b-value 1000, SENSE factor 5
Arial acquisition (reformat) 7:53 min.
b-value 1000, SENSE factor 5

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Sep 18, 2012

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White Paper
Ingenia 1.5T, Ingenia 3.0T
Body, BrainView, dS-SENSE, dStream, mra, SmartSelect

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