What question did this study set out to answer?

To evaluate the effectiveness of FLORET trajectory in reducing the scan time for neonatal pulmonary MRI compared to radial UTE.

May 16, 2026Open Access

Reducing scan time burden for neonatal MRI of pulmonary structure using FLORET UTE

Puntos clave

To evaluate the effectiveness of FLORET trajectory in reducing the scan time for neonatal pulmonary MRI compared to radial UTE.
Eighteen NICU patients with severe bronchopulmonary dysplasia underwent MRI using Radial and FLORET UTE at 1.5 T.
Comparison of pulmonary signal-to-noise ratio, lung density, and radiologist scoring of motion artifacts and image quality across sequence types.
Statistical analysis included comparisons of SNR and lung density measurements between the two methods.
FLORET UTE reduced scan time by ~75% (4:40 vs. 16:41 min) with a 10-30% reduction in SNR (P < 0.05).
Normalized lung density was elevated in FLORET images compared to radial, indicating improved imaging quality (P < 0.05).
No significant differences in radiologist scores were found, indicating comparable image quality.

Resumen

Abstract Objective Pulmonary MRI in neonates can be performed with quality comparable to radial 3D ultrashort echo time (UTE) MRI in significantly less time using a FLORET trajectory. Materials and methods Eighteen NICU patients with severe bronchopulmonary dysplasia (BPD), age 40.9 ± 3.0 weeks at time of imaging, underwent MRI using Radial and FLORET UTE at 1.5 T. Pulmonary signal-to-noise ratio (SNR), lung density, and radiologist scoring of motion artifacts and image quality were compared across sequence types. Results FLORET UTE reduced scan time by ~ 75% (4:40 vs. 16:41 min.) while incurring only ~ 10–30% SNR reduction vs. radial (radial vs. 1-hub FLORET: 9.8 ± 2.8 vs. 9.0 ± 2.6, radial vs. 3-hub FLORET: 9.2 ± 3.0 vs. 7.7 ± 2.3), P < 0.05. Normalized lung density measurements were elevated in FLORET (radial vs. 1-hub FLORET: 0.42 ± 0.13 vs. 0.49 ± 0.14, radial vs. 3-hub FLORET: 0.49 ± 0.13 vs. 0.51 ± 0.13), P < 0.05. Accounting for scan time differences, normalized radial SNR was 19% and 16% lower than 1-hub and 3-hub FLORET, respectively ( P < 0.05). No significant differences in radiologist scores were found. Conclusion FLORET UTE images are of quality comparable to radial UTE at 75% of the total scan time, the current state of the art, and have a much greater time-SNR efficiency with enormous benefit in the neonatal population.

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