Department of Radiology, Cincinnati Children's Hospital Medical Center, 3333 Burnet Ave., Cincinnati, OH, 45229, USA.
Minot State University, Minot, ND, USA.
Pediatr Radiol. 2024 Nov;54(12):2068-2076. doi: 10.1007/s00247-024-06070-9. Epub 2024 Oct 15.
Today, magnetic resonance imaging (MRI) is rarely used in managing the care of premature neonates. This is in large part due to the medical and logistical challenges associated with moving neonates from the neonatal intensive care unit (NICU) to the radiology department. Furthermore, acoustic noise associated with MR scanning poses safety concerns for both practitioners and neonatal patients. A small-format 3.0-T neonatal scanner was recently developed and placed within the NICU to address these logistical and acoustic challenges.
To compare acoustic noise measurements of a small-format 3.0-T neonatal MRI scanner with conventional adult-sized 1.5-T and 3.0-T MRI scanners using identical neonatal head imaging protocols.
Sound pressure level (SPL) measurements of a standard imaging protocol were made in a small-format neonatal 3.0-T MRI scanner as well as in adult-sized 1.5-T and 3.0-T scanners. SPL measurements were made with a Brüel & Kjær sound level meter model 2250. The statistical significance of the differences in SPL between scanners was determined using one-way ANOVA.
Average sound pressure level values were measured in unweighted decibels (dB) and A-weighted decibels (dBA) for all imaging sequences in the protocol. The average A-weighted SPLs for the NICU from 1.5-T and 3.0-T MRI scanners were 81.02 ± 0.28 dBA, 87.00 ± 0.85 dBA, and 94.91 ± 0.65 dBA, respectively. SPLs at the isocenter of the NICU MRI scanner were 5.98 dBA quieter than in the 1.5-T scanner (P=0.007), and 13.89 dBA quieter than in the 3.0-T scanner (P<0.001). For staff standing next to the scanner, the NICU scanner was 20.24 dBA quieter than the 1.5-T scanner (P<0.001) and 19.28 dBA quieter than the 3.0-T scanner (P<0.001).
The NICU 3.0-T MRI system is significantly quieter than conventional adult-sized MRI systems, improving safety for neonatal patients. Significant reductions in SPL were also noted inside the screen room where clinicians may be present during scanning.
目前，磁共振成像（MRI）在早产儿护理管理中很少使用。这在很大程度上是由于将新生儿从新生儿重症监护病房（NICU）转移到放射科所涉及的医疗和后勤挑战。此外，与磁共振扫描相关的声噪声对从业人员和新生儿患者的安全构成了担忧。最近开发了一种小型 3.0-T 新生儿扫描仪，并将其放置在 NICU 内，以解决这些后勤和声学挑战。
使用相同的新生儿头部成像方案，比较小型 3.0-T 新生儿 MRI 扫描仪与常规成人大小 1.5-T 和 3.0-T MRI 扫描仪的声噪声测量值。
使用标准成像方案在小型新生儿 3.0-T MRI 扫描仪以及成人大小 1.5-T 和 3.0-T 扫描仪中进行声压级（SPL）测量。使用 Brüel & Kjær 声级计型号 2250 进行 SPL 测量。使用单因素方差分析确定扫描仪之间 SPL 差异的统计学意义。
在协议中的所有成像序列中，以未加权分贝（dB）和 A 加权分贝（dBA）测量平均声压级值。来自 1.5-T 和 3.0-T MRI 扫描仪的 NICU 的平均 A 加权 SPL 分别为 81.02 ± 0.28 dBA、87.00 ± 0.85 dBA 和 94.91 ± 0.65 dBA。NICU MRI 扫描仪等中心点的 SPL 比 1.5-T 扫描仪安静 5.98 dB（P=0.007），比 3.0-T 扫描仪安静 13.89 dB（P<0.001）。对于站在扫描仪旁边的工作人员，NICU 扫描仪比 1.5-T 扫描仪安静 20.24 dB（P<0.001），比 3.0-T 扫描仪安静 19.28 dB（P<0.001）。
NICU 3.0-T MRI 系统明显比常规成人大小的 MRI 系统安静，提高了新生儿患者的安全性。在扫描过程中临床医生可能在场的屏蔽室内，也注意到 SPL 显著降低。
