Coronary Arteries: Magnetization-prepared Contrast-enhanced Three-dimensional Volume-targeted Breath-hold MR Angiography

Li, D; Carr, James C.; Shea, Steven M.; Zheng, Jie; Deshpande, Vibhas; Wielopolski, Piotr A.; Finn, J. Paul

doi:10.1148/radiology.219.1.r01ap37270

Cited by 111 publications

(96 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For the evaluation of the vessel sharpness, we used a measure introduced in (Li et al 2001) and extended it to a semi-automatic evaluation of whole vessel branches ( Figure 4 illustrates the process):…”

Section: Vessel Sharpnessmentioning

confidence: 99%

See 1 more Smart Citation

Residual motion compensation in ECG-gated interventional cardiac vasculature reconstruction

Schwemmer¹,

Rohkohl²,

Lauritsch³

et al. 2013

Phys. Med. Biol.

View full text Add to dashboard Cite

Abstract. 3-D reconstruction of cardiac vasculature from angiographic C-arm CT (rotational angiography) data is a major challenge. Motion artefacts corrupt image quality, reducing usability for diagnosis and guidance. Many state-of-theart approaches depend on retrospective ECG-gating of projection data for image reconstruction. A trade-off has to be made regarding the size of the ECG-gating window. A large temporal window is desirable to avoid undersampling. However, residual motion will occur in a large window, causing motion artefacts.We present an algorithm to correct for residual motion. Our approach is based on a deformable 2-D-2-D registration between the forward projection of an initial, ECG-gated reconstruction, and the original projection data. The approach is fully automatic and does not require any complex segmentation of vasculature, or landmarks. The estimated motion is compensated for during the backprojection step of a subsequent reconstruction. We evaluated the method using the publicly available cavarev platform and on six human clinical datasets. We found a better visibility of structure, reduced motion artefacts, and increased sharpness of the vessels in the compensated reconstructions compared to the initial reconstructions. At the time of writing, our algorithm outperforms the leading result of the cavarev ranking list. For the clinical datasets, we found an average reduction of motion artefacts by 13±6%. Vessel sharpness was improved by 25±12% on average.

show abstract

Section: Vessel Sharpnessmentioning

confidence: 99%

“…The following algorithm is applied to each profile line l at each evaluation point (cf. Figure 4c) (Li et al 2001). It is important to note that all intensity measurements are taken from the original, non-windowed volumes.…”

Section: Vessel Sharpnessmentioning

confidence: 99%

Residual motion compensation in ECG-gated interventional cardiac vasculature reconstruction

Schwemmer¹,

Rohkohl²,

Lauritsch³

et al. 2013

Phys. Med. Biol.

View full text Add to dashboard Cite

show abstract

“…van Geuns et al [7] assessed the diagnostic accuracy of this approach and reported that 69% of segments were assessable, with sensitivity and specificity of 92% and 68%, respectively, for the detection of >50% luminal stenosis. One advantage of the breath-hold technique is that it allows for imaging of coronary arteries during the first pass of extracellular MR contrast media (e.g., Gd-DTPA), which rapidly diffuses from the intravascular space to the interstitial space after intravenous administration [8][9][10][11]. Regenfus et al [11] obtained breath-hold 3D coronary MRA immediately after injecting extracellular MR contrast agent at a flow rate of 1 ml/s and reported 94% sensitivity and 57% specificity for detecting significant CAD.…”

Section: Introduction Coronary Mra; Achilles Heel Of Cardiac Mri?mentioning

confidence: 99%

Cardiac MR Assessment of Coronary Arteries

Hamdy

Ishida

Sakuma

2017

Cardiovasc Imaging Asia

View full text Add to dashboard Cite

Imaging of coronary arteries with magnetic resonance has undergone undeniable progress during the past two decades. Although coronary computed tomography angiography detects coronary artery disease (CAD) with excellent diagnostic accuracy, the inevitable exposure to ionizing radiation and iodinated contrast administration make it less appealing in certain patient populations. Coronary magnetic resonance angiography (MRA) is now performed mostly as a whole heart, free breathing, three-dimensional study. Several factors influence quality and speed of the scan, including use of the appropriate pulse sequence according to the strength of the magnetic field, cardiac and respiratory gating, preparation pulses, multi-channel cardiac coils, parallel imaging, and contrast material injection. The use of coronary MRA is well established in coronary artery anomalies and aneurysms. While diagnostic performance has also improved markedly for the detection of CAD, coronary MRA is not yet a routine clinical study. However, coronary MRA is expected to be play a major role in the near future due to continuous research and technical achievements.

show abstract

“…Current 3D breath-hold acquisition schemes with breath-hold durations of 10 -40 s for a very limited number of slab partitions have been reported in several studies (15)(16)(17). In those studies, segmentation of in-plane data acquisition with up to four cardiac cycles for each slice partition was chosen to restrict the acquisition window to mid-diastole while counterbalancing breath-hold time constraints.…”

mentioning

confidence: 99%

Toward single breath‐hold whole‐heart coverage coronary MRA using highly accelerated parallel imaging with a 32‐channel MR system

Niendorf

Hardy

Giaquinto

et al. 2006

Magnetic Resonance in Med

118

View full text Add to dashboard Cite

Coronary MR angiography (CMRA) is generally confined to the acquisition of multiple targeted slabs with coverage dictated by the competing constraints of signal-to-noise ratio (SNR), physiological motion, and scan time. This work addresses these obstacles by demonstrating the technical feasibility of using a 32-channel coil array and receiver system for highly accelerated volumetric breath-hold CMRA. The use of the 32-element array in unaccelerated CMRA studies provided a baseline SNR increase of as much as 40% over conventional cardiac-optimized phased array coils, which resulted in substantially enhanced image quality and improved delineation of the coronary arteries. Modest accelerations were used to reduce breath-hold durations for tailored coverage of the coronary arteries using targeted multi-oblique slabs to as little as 10 s. Finally, high net accelerations were combined with the SNR advantages of a 3D steady-state free precession (SSFP) technique to achieve previously unattainable comprehensive volumetric coverage of the coronary arteries in a single breath-hold. The merits and limitations of this simplified volumetric imaging approach are discussed and its implications for coronary MRA are considered. Magn Reson Med 56:167-176, 2006.

show abstract

Coronary Arteries: Magnetization-prepared Contrast-enhanced Three-dimensional Volume-targeted Breath-hold MR Angiography

Cited by 111 publications

References 38 publications

Residual motion compensation in ECG-gated interventional cardiac vasculature reconstruction

Residual motion compensation in ECG-gated interventional cardiac vasculature reconstruction

Cardiac MR Assessment of Coronary Arteries

Toward single breath‐hold whole‐heart coverage coronary MRA using highly accelerated parallel imaging with a 32‐channel MR system

Contact Info

Product

Resources

About