Quiet Submillimeter MR Imaging of the Lung Is Feasible with a PETRA Sequence at 1.5 T

Dournes, Gaël; Grodzki, David; Macey, Julie; Girodet, Pierre‐Olivier; Fayon, Michaël; Chateil, Jean‐François; Montaudon, Michel; Berger, Patrick; Laurent, François

doi:10.1148/radiol.2016164006

Cited by 58 publications

(90 citation statements)

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“…The challenges in obtaining standardized chest imaging for children (i. e., low radiation exposure, negligible artifacts and consistent lung volumes) have recently been overcome with improvements in MRI techniques [13,[16][17][18]. MRI is a radiation-free technique and can provide functional quantification of air trapping and lung perfusion with non-static imaging techniques.…”

Section: Discussionmentioning

confidence: 99%

Differing Pulmonary Structural Abnormalities Detected on Pulmonary MR Imaging in Cystic Fibrosis Patients with Varying Pancreatic Function

Kraus

Teufel²,

Esser

et al. 2020

Rofo

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Purpose In cystic fibrosis (CF) the phenotypic expression of complaints varies widely. Genotypes with sufficient pancreatic function (PS) exhibit milder lung disease compared to CF patients with insufficient pancreatic function (PI). The purpose of this study was to evaluate structural lung disease (SLD) in CF patients with differing pancreatic status but similar results on pulmonary function testing using a pulmonary magnetic resonance imaging score (MR-CF score). Materials and Methods In this retrospective study, 20 patients in our single-center CF database were included: 10 with PS (mean age 12.5 years; six male; BMI 17.4 kg/m2; FeV1 102 %) were matched by gender, age and lung function with 10 PI patients. Experienced observers semi-quantitatively assessed SLD for each lung lobe. The established MR-CF score measures the extent and the severity of bronchiectasis and bronchial wall thickening, mucus plugging, centrilobular opacity, consolidation, sacculation, and air trapping. The total score and sub-score values were compared to the pancreatic status. Results Patients with CF-PS had overall statistically significant lower MR-CF scores (p = 0.024), and therefore milder SLD, compared to CF-PI. The differences were most significant for bronchiectasis (p = 0.0042) and air trapping (p = 0.0304). SLD was more severe in the upper lobes in all patients. However, differences between CF-PS and CF-PI patients were present in both the upper and lower lung areas (p = 0.0247 and p = 0.0196, respectively). Conclusion Our results demonstrated that CF patients with impaired pancreatic function show more severe lung pathology detected by MRI, especially bronchiectasis and air trapping. Key points: Citation Format

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Section: Discussionmentioning

confidence: 99%

Differing Pulmonary Structural Abnormalities Detected on Pulmonary MR Imaging in Cystic Fibrosis Patients with Varying Pancreatic Function

Kraus

Teufel²,

Esser

et al. 2020

Rofo

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“…In general, radial sampling eliminates motion artifacts by dispersion, with an effect of a different direction in the phase encoding . In addition, PETRA uses a gradient system so that the gradient is already switched on during k ‐space encoding, which results in no shading or streaking artifacts . Another reason for good visibility with PETRA is the use of UTE.…”

Section: Discussionmentioning

confidence: 99%

“…Recent studies have shown good visualization of the lung parenchyma and mediastinum in adult patients using UTE‐MRI . Pointwise encoding time reduction with radial acquisition (PETRA) is a UTE technique that has demonstrated submillimeter imaging of the bronchi . PETRA uses very limited gradient activity with 3D radial sampling and can achieve images in short T 2 substances as well as silent MRI scans .…”

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confidence: 99%

Visualization of the airway in infants with MRI using pointwise encoding time reduction with radial acquisition (PETRA)

Niwa

Nozawa

Aida

2016

Magnetic Resonance Imaging

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“…Only in the last 2-3 years has it been possible to technically optimize the MRI devices in such a way that echo times in the microsecond range are possible (Table 2). This means that the old idea of the UTE sequence can now be put into practice [19]. This technology could revolutionize lung imaging in MRI [20].…”

Section: General Recommendations For Good Lung Magnetic Resonance Imamentioning

confidence: 99%

The current status and further prospects for lung magnetic resonance imaging in pediatric radiology

Hirsch¹,

Sorge²,

Vogel‐Claussen

et al. 2020

Pediatr Radiol

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Lung MRI makes it possible to replace up to 90% of CT examinations with radiation-free magnetic resonance diagnostics of the lungs without suffering any diagnostic loss. The individual radiation exposure can thus be relevantly reduced. This applies in particular to children who repeatedly require sectional imaging of the lung, e.g., in tumor surveillance or in chronic lung diseases such as cystic fibrosis. In this paper we discuss various factors that favor the establishment of lung MRI in the clinical setting. Among the many sequences proposed for lung imaging, respiration-triggered T2-W turbo spin-echo (TSE) sequences have been established as a good standard for children. Additional sequences are mostly dispensable. The most important pulmonary findings are demonstrated here in the form of a detailed pictorial essay. T1-weighted gradient echo sequences with ultrashort echo time are a new option. These sequences anticipate signal loss in the lung and deliver CT-like images with high spatial resolution. When using self-gated T1-W ultrashort echo time 3-D sequences that acquire iso-voxel geometry in the submillimeter range, secondary reconstructions are possible.

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Quiet Submillimeter MR Imaging of the Lung Is Feasible with a PETRA Sequence at 1.5 T

Cited by 58 publications

References 1 publication

Differing Pulmonary Structural Abnormalities Detected on Pulmonary MR Imaging in Cystic Fibrosis Patients with Varying Pancreatic Function

Differing Pulmonary Structural Abnormalities Detected on Pulmonary MR Imaging in Cystic Fibrosis Patients with Varying Pancreatic Function

Visualization of the airway in infants with MRI using pointwise encoding time reduction with radial acquisition (PETRA)

The current status and further prospects for lung magnetic resonance imaging in pediatric radiology

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