Fast non-uniform radiance probe placement and tracing

2019 ◽  
Author(s):  
Yue Wang ◽  
Soufiane Khiat ◽  
Paul G. Kry ◽  
Derek Nowrouzezahrai
Keyword(s):  
Probe Placement

scholarly journals Changes in Muscle Hardness from Resting to Mid-Range Lengthened Positions Detected by Shear Wave Elastography (SWE) with a Novel Protocol of Ultrasound Probe Placement

2021 ◽  
Vol 11 (1) ◽  
pp. 452
Author(s):  
Long-Jun Ren ◽  
Connie Lok-Kan Cheng ◽  
Christina Zong-Hao Ma ◽  
Yong-Ping Zheng
Keyword(s):  
Shear Wave ◽  
Intraclass Correlation ◽  
Shear Wave Elastography ◽  
Rectus Femoris ◽  
Healthy Adults ◽  
Physiological Status ◽  
Ultrasound Probe ◽  
Muscle Hardness ◽  
Age Related ◽  
Probe Placement

Muscle hardness and its relationship with different muscle lengths/positions are important for understanding its underlying physiological status, and yet remained unclear. This study aimed to detect the local muscle hardness at different muscle lengths and identify the influence of muscle position on muscle hardness in healthy adults. A total of 26 healthy adults participated in this study. Shear wave elastography (SWE) was used to measure the muscle hardness of the Rectus Femoris (RF), Tibialis Anterior (TA) and Gastrocnemius Medialis (GM). Each muscle was tested at both resting (RST) and mid-range lengthened (MRL) positions. A novel ultrasound probe placing method was introduced, applied, and evaluated in this study. Moderate to excellent intra-/inter-rater reliability (Intraclass Correlation Coefficient, ICC ≥ 0.70) was found for muscle hardness measurements. The muscle hardness significantly increased from the RST to MRL position for all three muscles (p < 0.001). This study found that the muscle hardness increased at its mid-range lengthened position from the resting position. The mid-range lengthened muscle position of TA and GM could also be sensitive enough to reflect the age-related changes in local muscle hardness. This study also highlights the importance of placing the assessed extremities in an appropriate and consistent position when assessing muscle qualities by ultrasonics in clinical practice.

Optimal Nasopharyngeal Temperature Probe Placement

2015 ◽  
Vol 59 (2) ◽  
pp. 103-104
Author(s):  
Jeongwoo Lee ◽  
Hyungsun Lim ◽  
Kyung-geun Son ◽  
Seonghoon Ko
Keyword(s):  
Temperature Probe ◽  
Probe Placement

scholarly journals The 2017 EULAR standardised procedures for ultrasound imaging in rheumatology

2017 ◽  
Vol 76 (12) ◽  
pp. 1974-1979 ◽  
Author(s):  
Ingrid Möller ◽  
Iustina Janta ◽  
Marina Backhaus ◽  
Sarah Ohrndorf ◽  
David A Bong ◽  
...  
Keyword(s):  
Musculoskeletal Diseases ◽  
Task Force ◽  
Nominal Group Technique ◽  
Nominal Group ◽  
Anatomic Structure ◽  
Scanning Method ◽  
European League Against Rheumatism ◽  
The Us ◽  
Technological Developments ◽  
Probe Placement

BackgroundIn 2001, the European League Against Rheumatism developed and disseminated the first guidelines for musculoskeletal (MS) ultrasound (US) in rheumatology. Fifteen years later, the dramatic expansion of new data on MSUS in the literature coupled with technological developments in US imaging has necessitated an update of these guidelines.ObjectivesTo update the existing MSUS guidelines in rheumatology as well as to extend their scope to other anatomic structures relevant for rheumatology.MethodsThe project consisted of the following steps: (1) a systematic literature review of MSUS evaluable structures; (2) a Delphi survey among rheumatologist and radiologist experts in MSUS to select MS and non-MS anatomic structures evaluable by US that are relevant to rheumatology, to select abnormalities evaluable by US and to prioritise these pathologies for rheumatology and (3) a nominal group technique to achieve consensus on the US scanning procedures and to produce an electronic illustrated manual (ie, App of these procedures).ResultsStructures from nine MS and non-MS areas (ie, shoulder, elbow, wrist and hand, hip, knee, ankle and foot, peripheral nerves, salivary glands and vessels) were selected for MSUS in rheumatic and musculoskeletal diseases (RMD) and their detailed scanning procedures (ie, patient position, probe placement, scanning method and bony/other landmarks) were used to produce the App. In addition, US evaluable abnormalities present in RMD for each anatomic structure and their relevance for rheumatology were agreed on by the MSUS experts.ConclusionsThis task force has produced a consensus-based comprehensive and practical framework on standardised procedures for MSUS imaging in rheumatology.

scholarly journals Measurement of Tissue Oximetry in Standing Unsedated and Sedated Horses

2021 ◽  
Vol 8 (10) ◽  
pp. 202
Author(s):  
Nicholas Cowling ◽  
Solomon Woldeyohannes ◽  
Albert Sole Guitart ◽  
Wendy Goodwin
Keyword(s):  
Near Infrared ◽  
Muscle Group ◽  
Controlled Study ◽  
Tissue Oxygen Saturation ◽  
Sartorius Muscle ◽  
Muscle Belly ◽  
Linear Effects ◽  
Probe Placement ◽  
Prospective Controlled Study ◽  
Tissue Oximetry

Near infrared spectroscopy (NIRS) noninvasively measures peripheral tissue oxygen saturation (StO2) and may be useful to detect early changes in StO2 in anaesthetized and critically ill horses. This study aimed to identify the muscle belly that provided the highest percentage of successful StO2 readings and the highest mean StO2 value. Fifty adult horses were enrolled in a prospective controlled study. StO2 was measured at six different muscles in each horse, for each intervention: hair overlying the muscle was clipped (post clipping: PC), clipped skin was cleaned with chlorhexidine (post-surgical prepping: PP) and medetomidine was administered intravenously (post medetomidine: PM). Mean StO2 values were calculated for each muscle, and a linear effects model was used to assess the effect of muscle group and intervention on StO2. The sartorius muscle gave the highest percentage of successful StO2 values (p < 0.001) and the highest mean (90% CI) StO2 values for the PC, PP and PM interventions. Surgical prepping of the skin increased the success for measurement of StO2 values. For all muscles, administration of medetomidine was associated with lower StO2 values (p < 0.001). In conclusion, of the muscles examined, the sartorius muscle may be the preferred muscle to measure StO2 in horses, and clipping and cleaning of the probe placement site is recommended.

Ideal Site for Skin Temperature Probe Placement on Infants in the NICU

2017 ◽  
Vol 17 (2) ◽  
pp. 114-122 ◽  
Author(s):  
Rachel A. Joseph ◽  
Sarah Derstine ◽  
Michaela Killian
Keyword(s):  
Skin Temperature ◽  
Temperature Probe ◽  
Probe Placement

Application of the First Higher-Order (M21) Mode Rayleigh Wave to the Inspection of Stainless Steel Overlays

1990 ◽  
Vol 112 (3) ◽  
pp. 298-301 ◽  
Author(s):  
D. E. Bray
Keyword(s):  
Stainless Steel ◽  
Point Contact ◽  
Base Material ◽  
Higher Order ◽  
Inspection Method ◽  
High Frequencies ◽  
Steel Material ◽  
Welding Defects ◽  
Stainless Steel Material ◽  
Probe Placement

Efficient inspection of stainless steel overlays appears to present a particularly challenging problem due to the anisotropy that is characteristic of that material. An improved inspection technique may be available, however, when the dissimilar properties of the overlay and the base material are utilized. Higher order mode Rayleigh waves which at high frequencies remain confined to the upper layer of the stainless steel material are demonstrated to be able to detect welding defects in the overlay material in a field some distance away from the probe. With this technique, a larger area may be scanned with each probe placement rather than the point contact probe inspection method that is typically used.

Accurate Blade Tip Timing Limits Through Geometry Mistuning Modeling

2015 ◽  
Author(s):  
Alexander A. Kaszynski ◽  
Jeffrey M. Brown
Keyword(s):  
Stress Measurement ◽  
Mode Shapes ◽  
Time Of Arrival ◽  
High Fidelity ◽  
Element Analysis ◽  
Classic Approach ◽  
Blade Tip ◽  
Geometric Variation ◽  
The Relationship ◽  
Probe Placement

Blade tip timing (BTT) is a commonly used non-intrusive stress measurement system to estimate the operational stresses within an engine’s rotors without the costly installation of strain gauges that can add additional stiffness to the rotor. BTT systems are now standard on many engine tests and ensure safe operations by avoiding running near maximum rotor stress limits. Since these systems measure blade time of arrival (TOA), processes are applied to first convert this data to displacement and then to stress. This effort focuses on the conversion of displacement to stress where the the classic approach utilizes nominal geometry obtained from an “as-designed” nominal model and creates computes the mode shapes using finite element analysis (FEA). The predicted mode shapes of the cyclic analysis reveal the relationship between maximal blade stress and tip displacement for a given nominally designed rotor. However, manufactured rotors deviate from nominal design due to inherent variability in the machining procedures. It is now possible through high fidelity optical geometry collection systems to obtain more accurate BTT limits using measured IBR geometry from as-manufactured rotors. It will be shown that due to the high variability of blade-to-blade geometry obtained from an optically scanned rotor that the BTT limits can vary significantly between blades. A method is also developed that allows comparisons between cyclic sector and full rotor FEA. This research suggests to optimize BTT probe placement not only to measure the maximum expected deflection given blade tip mode shapes, but also to account to for blade to blade geometric variation.

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