Lung MRI assessment with high-frequency noninvasive ventilation at 3â¯T.
Magn Reson Imaging
; 74: 64-73, 2020 12.
Article
en En
| MEDLINE
| ID: mdl-32898653
ABSTRACT
PURPOSE:
To investigate three MR pulse sequences under high-frequency noninvasive ventilation (HF-NIV) at 3â¯T and determine which one is better-suited to visualize the lung parenchyma.METHODS:
A 3D ultra-short echo time stack-of spirals Volumetric Interpolated Breath-hold Examination (UTE Spiral VIBE), without and with prospective gating, and a 3D double-echo UTE sequence with spiral phyllotaxis trajectory (3D radial UTE) were performed at 3â¯T in ten healthy volunteers under HF-NIV. Three experienced radiologists evaluated visibility and sharpness of normal anatomical structures, artifacts assessment, and signal and contrast ratio computation. The median of the three readers'scores was used for comparison, pâ¯<â¯.05 was considered statistically significant. Incidental findings were recorded and reported.RESULTS:
The 3D radial UTE resulted in less artifacts than the non-gated and gated UTE Spiral VIBE in inferior (score 3D radial UTEâ¯=â¯3, slight artifact without blurring vs. score UTE Spiral VIBE non-gated and gatedâ¯=â¯2, moderate artifact with blurring of anatomical structure, pâ¯=â¯.018 and pâ¯=â¯.047, respectively) and superior lung regions (score 3D radial UTEâ¯=â¯3, vs. score UTE Spiral VIBE non-gatedâ¯=â¯2.5, pâ¯=â¯.48 and score UTE Spiral VIBE gatedâ¯=â¯1, severe artifact with no normal structure recognizable, pâ¯=â¯.014), and higher signal and contrast ratios (pâ¯=â¯.002, pâ¯=â¯.093). UTE Spiral VIBE sequences provided higher peripheral vasculature visibility than the 3D radial UTE (94.4% vs 80.6%, respectively, pâ¯<â¯.001). The HF-NIV was well tolerated by healthy volunteers who reported on average minor discomfort. In three volunteers, 12 of 18 nodules confirmed with low-dose CT were identified with MRI (average size 2.6⯱â¯1.2â¯mm).CONCLUSION:
The 3D radial UTE provided higher image quality than the UTE Spiral VIBE. Nevertheless, a better nodule assessment was noticed with the UTE Spiral VIBE that might be due to better peripheral vasculature visibility, and requires confirmation in a larger cohort.Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Imagen por Resonancia Magnética
/
Ventilación no Invasiva
/
Pulmón
Tipo de estudio:
Prognostic_studies
Límite:
Adult
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
Magn Reson Imaging
Año:
2020
Tipo del documento:
Article
País de afiliación:
Suiza