Subtractionless first-pass single contrast medium dose peripheral MR angiography using two-point Dixon fat suppression

Leiner, Tim; Habets, Jesse; Versluis, Bas; Geerts, Liesbeth; Alberts, Eveline; Blanken, Niels; Hendrikse, Jeroen; Vonken, Evert-Jan P.A.; Eggers, Holger

doi:10.1007/s00330-013-2833-y

Cited by 26 publications

(34 citation statements)

References 17 publications

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“…Previous studies have shown promising results of two-point Dixon fat suppression MRA to increase image quality by suppressing the signal of fat adjacent to vessels [16][17][18].…”

Section: Introductionmentioning

confidence: 98%

Dixon-based fat-free MR-angiography compared to first pass and steady-state high-resolution MR-angiography using a blood pool contrast agent

Homsi

Gieseke

Kukuk

et al. 2015

Magnetic Resonance Imaging

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“…Previous studies have shown promising results of two-point Dixon fat suppression MRA to increase image quality by suppressing the signal of fat adjacent to vessels [16][17][18].…”

Section: Introductionmentioning

confidence: 98%

Dixon-based fat-free MR-angiography compared to first pass and steady-state high-resolution MR-angiography using a blood pool contrast agent

Homsi

Gieseke

Kukuk

et al. 2015

Magnetic Resonance Imaging

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“…Aside from the array itself, imaging the pelvis without using breath holding typically introduces motion, another dimension of potential degradation of image quality. Such motion-related artifacts may be mitigated by other methods, such as subtractionless Dixon imaging [37–40]. …”

Section: Discussionmentioning

confidence: 99%

Improved receiver arrays and optimized parallel imaging accelerations applied to time-resolved 3D fluoroscopically tracked peripheral runoff CE-MRA

Weavers

Borisch

Hulshizer

et al. 2016

Magnetic Resonance Imaging

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Objectives Three-station stepping-table time-resolved 3D contrast-enhanced magnetic resonance angiography has conflicting demands in the need to limit acquisition time in proximal stations to match the speed of the advancing contrast bolus and in the distal-most station to avoid venous contamination while still providing clinically useful spatial resolution. This work describes improved receiver coil arrays which address this issue by allowing increased acceleration factors, providing increased spatial resolution per unit time. Materials and Methods Receiver coil arrays were constructed for each station (pelvis, thigh, calf) and then integrated into a 48-element array for three-station peripheral CE-MRA. Coil element sizes and array configurations for these three stations were designed to improve SENSE-type parallel imaging taking advantage of an increase in coil count for all stations versus the previous 32 channel capability. At each station either Acceleration Apportionment or optimal CAIPIRINHA selection was used to choose the optimum acceleration parameters for each subject. Results were evaluated in both single- and multistation studies. Results Single-station studies showed that SENSE acceleration in the thigh station could be readily increased from R = 8 to R = 10, allowing reduction of the frame time from 2.5 to 2.1 sec to better image the typically rapidly advancing bolus at this station. Similarly, the improved coil array for the calf station permitted acceleration increase from R = 8 to R = 12, providing a 4.0 vs. 5.2 sec frame time. Results in three-station studies suggest an improved ability to track the contrast bolus in peripheral CE-MRA. Conclusions Modified receiver coil arrays and individualized parameter optimization have been used to provide improved acceleration at all stations in multi-station peripheral CE-MRA and provide high spatial resolution with frame times as short as 2.1 sec.

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“…Alternatively, in cases that are expected to have rapid arterial-to-venous transit, a targeted time-resolved acquisition at the calf-foot station prior to or after the bolus chase runoff could be performed, as is done with hybrid MRA acquisitions. Third, motion-related artifacts can potentially be addressed using a two-point Dixon technique for subtractionless MRA (33). Another option is to use a blood pool contrast agent, which would enable a quick steady-state acquisition at the abdomen-pelvis station following the first-pass run if needed (34).…”

Section: Discussionmentioning

confidence: 99%

Three-Station Three-dimensional Bolus-Chase MR Angiography with Real-time Fluoroscopic Tracking

Johnson¹,

Weavers

Borisch

et al. 2014

Radiology

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Purpose To perform a preliminary clinical feasibility study of the real-time fluoroscopic tracking technique for bolus chase MR angiography (MRA) of peripheral vasculature to image three stations extending from the aortoiliac bifurcation to the pedal arteries. Materials and Methods 21 subjects comprised of eight healthy volunteers (3 male; mean age: 48 yr; age range: 30–81 yr) and 13 patients with suspected peripheral arterial disease (5 male; mean age: 67 yr; age range: 47–81 yr) were enrolled in an IRB-approved and HIPAA-compliant prospective study and provided informed consent. All subjects were imaged with the fluoroscopic tracking MRA protocol. Ten patients were additionally imaged with a clinical CT angiography (CTA) runoff exam. Two readers scored the MRA studies for vessel signal and sharpness and presence of confounding artifact and venous contamination at 35 arterial segments. Mean aggregate scores were assessed. The paired MRA and CTA studies were additionally scored for visualization of disease, reading confidence, and overall diagnostic quality and compared using a Wilcoxon signed rank test. Results Real-time fluoroscopic tracking performed well technically in all studies. Vessel segments were scored good to excellent in all evaluation categories with the following exceptions: for vessel signal and sharpness, the abdominal aorta, iliac arteries, distal plantar arteries, and plantar arch were scored fair to good; and for presence of confounding artifact, the abdominal aorta and iliac arteries were scored fair. The MRA and CTA studies did not differ significantly in any scoring category (Reader 1: p=0.50, 0.39, and 0.39; Reader 2: p=0.41, 0.61, 0.33). CTA tended to be favored overall as it was scored “substantially better” in 20% (4/20) and 25% (5/20) of the pooled evaluations for the visualization of disease and overall image quality categories, respectively, versus 5% (1/20) for MRA in both categories. Conclusion Three-station bolus chase MRA using real-time fluoroscopic tracking provided high-spatial-resolution arteriograms of the peripheral vasculature, enabled precise triggering of table motion, and compared well to CTA.

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Subtractionless first-pass single contrast medium dose peripheral MR angiography using two-point Dixon fat suppression

Cited by 26 publications

References 17 publications

Dixon-based fat-free MR-angiography compared to first pass and steady-state high-resolution MR-angiography using a blood pool contrast agent

Dixon-based fat-free MR-angiography compared to first pass and steady-state high-resolution MR-angiography using a blood pool contrast agent

Improved receiver arrays and optimized parallel imaging accelerations applied to time-resolved 3D fluoroscopically tracked peripheral runoff CE-MRA

Three-Station Three-dimensional Bolus-Chase MR Angiography with Real-time Fluoroscopic Tracking

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