We measured the sound level and frequencies of the acoustic noise generated by a 3 Tesla (T) MR scanner, and investigated the subjective sound level for 30 healthy volunteers with either earplugs, headphones or both. The sound level of 3T was found to be higher than that of 1.5T in all sequences. The peak sound pressure level of 3T ranged from 125.7 dB for MR angiography to 130.7 dB for single shot EPI on the linear scale. The equivalent noise level was from 110.0 dB for FLAIR to 115.8 dB for T1-IR on the A-weighted scale, which exceeded 99 dB, the level regulated by the International Electrotechnical Commission (IEC). The study of the subjective sound level showed that the effect of noise reduction was not significantly different between earplugs and headphones. However, the use of both devices could reduce the subjective sound level significantly better than either one alone (P < 0.01). Thus we propose wearing both devices for ear-protection during 3T examinations.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Validation of the Hanvon FY730 upper-arm blood pressure monitor according to the AAMI/ESH/ISO universal standard (ISO 81060-2:2018).
Blood Press Monit
January 2025
Shijiazhuang People's Hospital, Shijiazhuang, Hebei Province, China.
This study evaluates the measurement accuracy of the Hanvon FY730 upper-arm blood pressure (BP) monitor, which uses the Korotkoff sound method, in compliance with the AAMI/ESH/ISO universal standard (ISO 81060-2:2018). A clinical trial involving 86 eligible adults was conducted, and data were analyzed based on standardized protocols. The mean differences between the device and reference measurements for systolic blood pressure (SBP) and diastolic blood pressure (DBP) were -0.
View Article and Find Full Text PDFEffect of relaxing sounds on anxiety levels in patients undergoing dental extraction: A randomized clinical trial.
Natl J Maxillofac Surg
November 2024
Department of Oral and Maxillofacial Surgery and Diagnostic Science, College of Dentistry, Prince Sattam Bin Abdullaziz University, Riyadh, Saudi Arabia.
Introduction: The study was conducted to observe the effect of using relaxing sounds as a nonpharmacological intervention on anxiety levels and vital signs among patients who underwent extraction.
Materials And Methods: A randomized clinical trial was conducted, and patients with an indication of dental extraction, who were physically and mentally healthy, were invited to voluntarily participate in the study. Dental anxiety was assessed by measuring blood pressure, heart rates, and respiratory rates as well as with the help of the Modified Dental Anxiety Scale (MDAS) questionnaire before and after the procedure.
Advances in mechanotransduction and sonobiology: effects of audible acoustic waves and low-vibration stimulations on mammalian cells.
Biophys Rev
December 2024
Department of Optics, Pharmacology and Anatomy, University of Alicante, San Vicente del Raspeig, Spain.
In recent decades, research on mechanotransduction has advanced considerably, focusing on the effects of audible acoustic waves (AAWs) and low-vibration stimulation (LVS), which has propelled the field of sonobiology forward. Taken together, the current evidence demonstrates the influence of these biosignals on key cellular processes, such as growth, differentiation and migration in mammalian cells, emphasizing the determining role of specific physical parameters during stimulation, such as frequency, sound pressure level/amplitude and exposure time. These mechanical waves interact with various cellular elements, including ion channels, primary cilia, cell-cell adhesion receptors, cell-matrix and extracellular matrix proteins, and focal adhesion complexes.
View Article and Find Full Text PDFNeuroimaging Findings for the Overnight Consolidation of Learned Non-native Speech Sounds.
Neurobiol Lang (Camb)
January 2025
Department of Speech, Language, and Hearing Sciences, University of Connecticut, Storrs, CT, USA.
Research over the past two decades has documented the importance of sleep to language learning. Sleep has been suggested to play a role in establishing new speech representations as well; however, the neural mechanisms corresponding to sleep-mediated effects on speech perception behavior are unknown. In this study, we trained monolingual English-speaking adults to perceive differences between the Hindi dental vs.
View Article and Find Full Text PDFPopulation-level shape variation and otolith asymmetry in Diplodus annularis.
Sci Rep
January 2025
Department of Sciences, University of Roma Tre, Viale Guglielmo Marconi, Roma, 446 - 00146, Italy.
Sound detection in fishes relies on the inner ear and peripheral structures, such as calcareous otoliths, which play a crucial role in perceiving movement, orientation, and balance. Otoliths, in particular, respond to various environmental factors including temperature, salinity, and food availability, making them valuable indicators of ecological conditions. This study applies geometric morphometrics (GMM) to analyze the otolith shape of Diplodus annularis (Linnaeus, 1758) from two distinct populations located in the Gulf of Asinara (Porto Torres, Sardinia) and the northern Adriatic Sea (Le Tegnue).
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!