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For more information, click on the image above for the DREAMIES T-M Product Datasheet.

Instructions For Use

See full-color detailed Instructions for Use for device placement, and warnings and precautions.

MRI Noise Exposure

Noise Exposure during MRI Examinations

Magnetic resonance imaging (MRI) has become an important tool to augment brain ultrasound in the evaluation of neonates, especially in preterm and very low birth weight infants, due to its better sensitivity detection of for white matter lesions and brain abnormalities than cranial ultrasound [M1]

The sound levels during high-field-strength MR scanning are high. MR brain imaging pulse sequences average approximately 98 dBA for a conventional MRI scanner and approximately 88 dBA for a specially designed NICU scanner [M2].

Loud noise generated by the MR scanner is an important clinical issue in neonatal MRI examinations because such noise can elicit autonomic instability, as reflected in cardiac rhythm changes, in neonates [M3, M4].

Also, due to the occurrence of motion artifacts associated with noise-related patient agitation, sedation — while undesirable — sometimes is necessary used during MRI studies [M5]. Reduced exposure to noise increases the probability that the MR examination can be completed without sedation and with fewer motion artifacts [M5].

For these reasons, passive hearing protectors (e.g., foam earplugs and/or ear muffs) capable of abating noise by 10 to 30 dB [M6] are used on patients, including infants and neonates [M2] to reduce noise exposure during MRI examinations