Free‐breathing dynamic contrast‐enhanced MRI for assessment of pulmonary lesions using golden‐angle radial sparse parallel imaging

Abstract

2 Technical Efficacy: Stage 1 J. MAGN. RESON. IMAGING 2018;48:459-468.

A Study of the Correlation of Perfusion Parameters in High‐Resolution GRASP MRI With Microvascular Density in Lung Cancer

“…The radial sampling scheme enables continuous data acquisitions during free breathing; the combination of compressed sensing and parallel imaging enables high temporal resolution and spatial resolution for different dynamic imaging applications; and, more importantly, the golden‐angle radial sampling scheme allows a dual‐mode reconstruction strategy that can be used for both morphological qualitative assessment and quantitative perfusion analysis simultaneously. The performance of GRASP has been demonstrated in a range of clinical applications, and it has recently been extended to free‐breathing DCE‐MRI of the lung for assessment of pulmonary lesions . These preliminary studies have all shown the great potential and capabilities of GRASP for improving the usefulness and effectiveness of DCE‐MRI towards routine clinical use.…”

Motion and solution in hepatobiliary agent-enhanced dynamic MRI: solid evidence and unanswered question

“…Radial sampling scheme so-called stack-of-stars technique is also promising [8,9]. By monitoring the respiratory movement from the k-space data, stack-of-stars technique may be able to avoid artifact due to abdominal wall motion [10].…”

3D ultrashort echo time MRI of the lung using stack‐of‐spirals and spherical k‐Space coverages: Evaluation in healthy volunteers and parenchymal diseases

“…Indeed, lung MRI suffers from the very fast decay of the lung signal related to susceptibility artifacts, the low proton content, and the need of synchronization due to cardiac and respiratory motions . Recent advances in the use of ultrashort echo time (UTE) has been able to improve pulmonary MR image quality in 3D . An increase in signal and contrast was shown in both healthy volunteers and patients with pulmonary diseases, from neonate to adulthood .…”

“…Although all 3D sequences seek to decrease the echo time down to the microsecond, variable schemes are used to sample the k ‐space. The two main k ‐space variants consist in acquiring the k ‐space either radially into a sphere or into a cylinder using stack‐of‐discs such as stack‐of‐stars or stack‐of‐spirals . In our institution, a novel prototype dedicated to 3D‐UTE imaging using VIBE (volume interpolated breath‐hold examination) and stack‐of‐spirals (3D‐USV) has been released for testing.…”

“…3 Recent advances in the use of ultrashort echo time (UTE) has been able to improve pulmonary MR image quality in 3D. [4][5][6][7][8][9] An increase in signal and contrast was shown in both healthy volunteers and patients with pulmonary diseases, from neonate 10 to adulthood. 11 However, several drawbacks remain.…”