Whole‐body magnetic resonance imaging featuring moving table continuous data acquisition with high‐precision position feedback

Zenge, Michael O.; Ladd, Mark E.; Vogt, Florian; Brauck, Katja; Barkhausen, Joerg; Quick, Harald H.

doi:10.1002/mrm.20598

Cited by 29 publications

(22 citation statements)

References 9 publications

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“…One possible way to achieve this goal is through the use of parallel imaging, which is becoming clinically accessible but was not used in our current study because a phased array coil was only available for the torso sections. A complete body phased array coil matrix with WB coverage or integrated phased-array surface coil with specialized rolling table platform, which are available on some scanner systems (26,27), would make the use of parallel imaging a viable choice for reducing the overall scanning time. Since an acceleration factor of 2 is now readily available, we estimate that even some partial implementation of the parallel imaging can help reduce the total patient table time of our WB MRI exam to less than 45 minutes.…”

Section: Discussionmentioning

confidence: 99%

Fast dixon‐based multisequence and multiplanar MRI for whole‐body detection of cancer metastases

Costelloe

Madewell

et al. 2009

Magnetic Resonance Imaging

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Purpose:To develop and demonstrate the feasibility of multisequence and multiplanar MRI for whole-body cancer detection. Materials and Methods:Two fast Dixon-based sequences and a diffusion-weighted sequence were used on a commercially available 1.5 T scanner for whole-body cancer detection. The study enrolled 19 breast cancer patients with known metastases and in multistations acquired wholebody axial diffusion-weighted, coronal T2-weighted, axial/ sagittal pre-and postcontrast T1-weighted, as well as triphasic abdomen images. Three radiologists subjectively scored Dixon images of each series for overall image quality and fat suppression uniformity on a 4-point scale (1 ϭ poor, 2 ϭ fair, 3 ϭ good, and 4 ϭ excellent). Results:Eighteen of the 19 patients completed the wholebody MRI successfully. The mean acquisition time and overall patient table time were 46 Ϯ 3 and 69 Ϯ 5 minutes, respectively. The average radiologists' scores for overall image quality and fat suppression uniformity were both 3.4 Ϯ 0.5. The image quality was consistent between patients and all completed whole-body examinations were diagnostically adequate. Conclusion:Whole-body MRI offering essentially all the most optimal tumor-imaging sequences in a typical 1-hour time slot can potentially become an appealing "one-stopshop" for whole-body cancer imaging. SEVERAL STUDIES have shown that magnetic resonance imaging (MRI) can be used for whole-body (WB) detection of cancer metastases (1-10). In comparison to other imaging modalities, MRI is potentially more desirable for WB imaging because it does not use ionizing radiation, has excellent soft-tissue contrast, and can provide multisequence and multiplanar imaging capabilities for improved diagnostic accuracy. However, the acquisition speed of most MRI sequences is relatively slow. Consequently, the large spatial coverage required in WB imaging often precludes acquiring images of the entire body with a large number of sequences and in different imaging planes. The scan time constraint may be further exacerbated by the fact that obtaining images with and without fat-suppression (which is sometimes needed) requires two separate acquisitions. In addition, fat suppression by the often-used frequency selective saturation techniques is difficult to perform consistently in the setting of WB MRI because of the field inhomogeneity or susceptibility artifacts that occur over the large field-of-view (FOV).Various techniques advocated and used in previous WB MRI studies include the coronal short-tau inversion recovery (STIR) technique (1,2), echo-planar imaging (EPI) technique (3,4), steady-state free-precession (SSFP) technique (5,6), and fat-suppressed three-dimensional (3D) fast spoiled gradient echo technique in conjunction with contrast agent injection (11). Despite their promising results, most of these WB MRI studies suffer from one or more of the above-mentioned technical limitations and have therefore not fully capitalized on the inherent potentials of MRI that are well established for dedicated imag...

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Section: Discussionmentioning

confidence: 99%

Fast dixon‐based multisequence and multiplanar MRI for whole‐body detection of cancer metastases

Costelloe

Madewell

et al. 2009

Magnetic Resonance Imaging

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“…The image reconstruction algorithm of Kruger et al (11) was incorporated into a standard Siemens reconstruction program (Siemens Medical Solutions, Erlangen, Germany) (20). The method depends on coaxial directions of the readout gradient and table translation.…”

Section: Theorymentioning

confidence: 99%

High‐resolution continuously acquired peripheral MR angiography featuring partial parallel imaging GRAPPA

Zenge

Vogt

Brauck

et al. 2006

Magnetic Resonance in Med

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Continuously-moving-table MRI, in contrast to traditional multistation techniques, potentially can improve the scan time efficiency of whole-body applications and provide seamless images of an extended field of view (FOV). Contrast-enhanced MR angiography (CE-MRA) in particular requires high spatial resolution and at the same time has rigid scan time constraints due to the limited arterial contrast window. In this study a reconstruction method for continuously acquired 3D data sets during table movement was combined with a self-calibrated partial parallel imaging algorithm (generalized autocalibrating partially parallel acquisitions (GRAPPA)). The method was applied to peripheral CE-MRA and compared with a standard continuously-moving-table MRA protocol. The gain in scan time was used to increase the data acquisition matrix and decrease the slice thickness. The method was evaluated in five healthy volunteers and applied to one patient with peripheral arterial occlusive disease (PAOD). The protocols were intraindividually compared with respect to the signal-to-noise ratio (SNR) and contrast-tonoise ratio (CNR) in selected vessel segments, as well as overall vessel depiction. The combination of the continuously-moving-

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“…Bei Mehrorganuntersuchungen ergaben sich lange Akquisitionszeiten oder es musste ein Verlust der hohen räumlichen und/ oder zeitlichen Auflösung in Kauf genommen werden. Durch technische Weiterentwicklungen wie parallele Aufnahmetechnik (PAT), kontinuierliche Tischbewegung, Mehrkanalempfangsspulen und neue Sequenzen kann heutzutage ein Ganzköper-MRT (inklusive Herz-MRT) mit guter räumlicher und zeitlicher Auflösung in einer angemessenen Akquisitionszeit erreicht werden [13,14,15,16,17]. Nachfolgend werden die wesentlichen MRT-Sequenz-und Messparameter diskutiert, die aktuell bei der kardiovaskulären Prognoseabschätzung verwendet werden.…”

Section: Mrt-technikunclassified

Prognostischer Wert der kardiovaskulären MRT bei Diabetikern

et al. 2015

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Whole‐body magnetic resonance imaging featuring moving table continuous data acquisition with high‐precision position feedback

Cited by 29 publications

References 9 publications

Fast dixon‐based multisequence and multiplanar MRI for whole‐body detection of cancer metastases

Fast dixon‐based multisequence and multiplanar MRI for whole‐body detection of cancer metastases

High‐resolution continuously acquired peripheral MR angiography featuring partial parallel imaging GRAPPA

Prognostischer Wert der kardiovaskulären MRT bei Diabetikern

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