In vivo verification of the acoustic model used to predict temperature elevations for MRI guided ultrasound surgery

2002 ◽  
Author(s):  
T. Fjield ◽  
N. McDannold ◽  
C. Silcox ◽  
K. Hynynen
Keyword(s):  
Acoustic Model ◽  
Ultrasound Surgery ◽  
Mri Guided

PD-0334 DEVELOPMENT, QUALITY ASSURANCE & IN VIVO USE OF AN MRI-GUIDED ROBOT FOR HIGH PRECISION BRACHYTHERAPY

2012 ◽  
Vol 103 ◽  
pp. S133-S134
Author(s):  
M.R. van den Bosch ◽  
M. van Vulpen ◽  
J.J.W. Lagendijk ◽  
M.A. Moerland
Keyword(s):  
Quality Assurance ◽  
High Precision ◽  
Mri Guided

scholarly journals How oscillating aerodynamic forces explain the timbre of the hummingbird’s hum and other animals in flapping flight

eLife ◽  
2021 ◽  
Vol 10 ◽  
Author(s):  
Ben J Hightower ◽  
Patrick W A Wijnings ◽  
Rick Scholte ◽  
Rivers Ingersoll ◽  
Diana D Chin ◽  
...  
Keyword(s):  
Aerodynamic Force ◽  
Microphone Array ◽  
Flapping Wings ◽  
Acoustic Model ◽  
Acoustic Measurements ◽  
Aerodynamic Forces ◽  
Drag Forces ◽  
Radiated Power ◽  
Lift And Drag

How hummingbirds hum is not fully understood, but its biophysical origin is encoded in the acoustic nearfield. Hence, we studied six freely hovering Anna's hummingbirds, performing acoustic nearfield holography using a 2176 microphone array in vivo, while also directly measuring the 3D aerodynamic forces using a new aerodynamic force platform. We corroborate the acoustic measurements by developing an idealized acoustic model that integrates the aerodynamic forces with wing kinematics, which shows how the timbre of the hummingbird's hum arises from the oscillating lift and drag forces on each wing. Comparing birds and insects, we find that the characteristic humming timbre and radiated power of their flapping wings originates from the higher harmonics in the aerodynamic forces that support their bodyweight. Our model analysis across insects and birds shows that allometric deviation makes larger birds quieter and elongated flies louder, while also clarifying complex bioacoustic behavior.

SU-E-J-60: In Vivo Management of Suspectibility-Induced Distortions for Intracranial MRI Guided Therapies at 3 Tesla

2013 ◽  
Vol 40 (6Part7) ◽  
pp. 163-163
Author(s):  
K Hwang ◽  
W Stefan ◽  
R Stafford
Keyword(s):  
3 Tesla ◽  
Mri Guided

MRI-GUIDED OPTICAL SPECTROSCOPY OF CANCER IN VIVO

2010 ◽  
Author(s):  
Brian William Pogue ◽  
Scott C Davis ◽  
Colin M Carpenter ◽  
Subhadra Srinvasan ◽  
Shudong Jiang ◽  
...  
Keyword(s):  
Optical Spectroscopy ◽  
Mri Guided
Sign in / Sign up

Export Citation Format

Share Document