Single-breath-hold whole-heart coronary MRA in healthy volunteers at 3.0-T MRI

Iyama, Yuji; Nakaura, Takeshi; Kidoh, Masafumi; Kawahara, Tetsuya; Sakaino, Naritsugu; Harada, Kazunori; Okuaki, Tomoyuki; Yamashita, Yasuyuki

doi:10.1186/2193-1801-3-667

Cited by 8 publications

(8 citation statements)

References 16 publications

(23 reference statements)

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“…Recent 3T MRI system using TFE sequence can offer adequate SNR in spite of having the short acquisition time of whole-heart coronary MRA because the SNR is proportional to the static field strength. 5 However, the spatial resolution of single breath hold unenhanced coronary MRA with TFE was relatively low 5 (Spatial resolution; 2.00 × 2.00 × 2.00). Additionally, the single breath hold unenhanced coronary MRA with TFE required relatively long time (37.7 ± 5.2 sec, 31 sec to 45 sec).…”

Section: Discussionmentioning

confidence: 99%

“… 3 , 4 In addition, previous report suggested the usefulness of single breath hold unenhanced coronary MRA with turbo field echo (TFE) technique. 5 They reported that the single-breath hold technique can shorten the total scan time and reduce the influence of respiratory motion. On the other hand, this sequence suffers from sensitivity to B0 inhomogeneity at 3T MRI.…”

Section: Introductionmentioning

confidence: 99%

“…However, the signal to noise ratio (SNR) of TFE with the T 2 -prep pulse tends to be lower than of SSFP 6 and the acceleration factor of parallel imaging cannot be easily increased at 3T unenhanced coronary MRA, and there were only a few reports about the usefulness of single breath hold unenhanced coronary MRA at 3T MRI. 5 , 7 , 8 …”

Section: Introductionmentioning

confidence: 99%

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Single-Breath-Hold Whole-heart Unenhanced Coronary MRA Using Multi-shot Gradient Echo EPI at 3T: Comparison with Free-breathing Turbo-field-echo Coronary MRA on Healthy Volunteers

Iyama

Nakaura

Nagayama

et al. 2018

MRMS

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Purpose:We investigated the feasibility of single breath hold unenhanced coronary MRA using multi-shot gradient echo planar imaging (MSG-EPI) on a 3T-scanner.Methods:Fourteen volunteers underwent single breath hold coronary MRA with a MSG-EPI and free-breathing turbo field echo (TFE) coronary MRA at 3T. The acquisition time, signal to noise ratio (SNR), and the contrast of the sequences were compared with the paired t-test. Readers evaluated the image contrast, noise, sharpness, artifacts, and the overall image quality.Results:The acquisition time was 88.1% shorter for MSG-EPI than TFE (24.7 ± 2.5 vs 206.4 ± 23.1 sec, P < 0.01). The SNR was significantly higher on MSG-EPI than TFE scans (P < 0.01). There was no significant difference in the contrast on MSG-EPI and TFE scans (1.8 ± 0.3 vs 1.9 ± 0.3, P = 0.24). There was no significant difference in image contrast, image sharpness, and overall image quality between two scan techniques. The score of image noise and artifact were significantly higher on MSG-EPI than TFE scans (P < 0.05).Conclusion:The single breath hold MSG-EPI sequence is a promising technique for shortening the scan time and for preserving the image quality of unenhanced whole heart coronary MRA on a 3T scanner.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Single-Breath-Hold Whole-heart Unenhanced Coronary MRA Using Multi-shot Gradient Echo EPI at 3T: Comparison with Free-breathing Turbo-field-echo Coronary MRA on Healthy Volunteers

Iyama

Nakaura

Nagayama

et al. 2018

MRMS

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“… 8 Ultimately even one-breath-hold scanning has recently been reported combining these advanced technologies. 9 However, these hardware and software are not always available and the one-breath-hold imaging is obtained at the expense of spatial resolution. Explanation and practice of stable respiration are important but not always effective.…”

Section: Discussionmentioning

confidence: 99%

Coronary Whole-heart MR Angiography: Feasibility of Breath-hold Chasing with Diaphragmatic Navigation

Matsutani¹,

Amaki²,

Sekina³

et al. 2016

magn reson med sci

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We propose a simple but novel data acquisition technique for whole-heart coronary magnetic resonance angiography (CMRA). In this technique, the breath-hold chasing MRA, data are collected during breath-hold intervals, with the navigation window manually adjusted to the diaphragmatic level. Compared with the conventional free breathing MRA, this method provided 33% reduction of acquisition time and improved visibility of right coronary artery in 18 normal subjects without any additional software or hardware requirements.

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“…While Compressed Sensing enables higher acceleration than conventional Parallel Imaging, acquiring sufficient data with the required level of image quality in one breath-hold is a challenging task. In [18] a single breath-hold acquisition protocol for imaging of the coronary arteries was presented. The average acquisition time in their approach was 37.7 ± 5.2 s which reveals potential for improvement.…”

Section: Acquisition Protocolmentioning

confidence: 99%

Automated Curved and Multiplanar Reformation for Screening of the Proximal Coronary Arteries in MR Angiography

et al. 2018

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Congenital anomalies of the coronary ostia can lead to sudden death. A screening solution would be useful to prevent adverse outcomes for the affected individuals. To be considered for integration into clinical routine, such a procedure must meet strict constraints in terms of invasiveness, time and user interaction. Imaging must be fast and seamlessly integrable into the clinical process. Non-contrast enhanced coronary magnetic resonance angiography (MRA) is well suited for this. Furthermore, planar reformations proved effective to reduce the acquired volumetric datasets to 2D images. These usually require time consuming user interaction, though. To fulfill the aforementioned challenges, we present a fully automated solution for imaging and reformatting of the proximal coronary arteries which enables rapid screening of these. The proposed pipeline consists of: (I) highly accelerated single breath-hold MRA data acquisition, (II) coronary ostia detection and vessel centerline extraction, and (III) curved planar reformation of the proximal coronary arteries, as well as multiplanar reformation of the coronary ostia. The procedure proved robust and effective in ten volunteer data sets. Imaging of the proximal coronary arteries took 24 ± 5 s and was successful within one breath-hold for all patients. The extracted centerlines achieve an overlap of 0.76 ± 0.18 compared to the reference standard and the average distance of the centerline points from the spherical surface for reformation was 1.1 ± 0.51 mm. The promising results encourage further experiments on patient data, particularly in coronary ostia anomaly screening.

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Single-breath-hold whole-heart coronary MRA in healthy volunteers at 3.0-T MRI

Cited by 8 publications

References 16 publications

Single-Breath-Hold Whole-heart Unenhanced Coronary MRA Using Multi-shot Gradient Echo EPI at 3T: Comparison with Free-breathing Turbo-field-echo Coronary MRA on Healthy Volunteers

Single-Breath-Hold Whole-heart Unenhanced Coronary MRA Using Multi-shot Gradient Echo EPI at 3T: Comparison with Free-breathing Turbo-field-echo Coronary MRA on Healthy Volunteers

Coronary Whole-heart MR Angiography: Feasibility of Breath-hold Chasing with Diaphragmatic Navigation

Automated Curved and Multiplanar Reformation for Screening of the Proximal Coronary Arteries in MR Angiography

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