Learning the Imaging Model of Speed-of-Sound Reconstruction via a Convolutional Formulation.

Speed-of-sound (SoS) is an emerging ultrasound contrast modality, where pulse-echo techniques using conventional transducers offer multiple benefits. For estimating tissue SoS distributions, spatial domain reconstruction from relative speckle shifts between different beamforming sequences is a promising approach. This operates based on a forward model that relates the sought local values of SoS to observed speckle shifts, for which the associated image reconstruction inverse problem is solved.

Using Monte Carlo Simulation to Forecast the Scientific Utility of Psychological App Studies: A Tutorial.

Mobile applications offer a wide range of opportunities for psychological data collection, such as increased ecological validity and greater acceptance by participants compared to traditional laboratory studies. However, app-based psychological data also pose data-analytic challenges because of the complexities introduced by missingness and interdependence of observations. Consequently, researchers must weigh the advantages and disadvantages of app-based data collection to decide on the scientific utility of their proposed app study.

I think you might like me: Emergence and change of meta-liking in initial social interactions.

Feeling accepted by others is a fundamental human motive and an important marker of successful social interactions. This interpersonal perception, known as meta-liking, is especially relevant during adolescence, when peer relationships deepen and expand. However, knowledge is limited regarding meta-liking formation in initial social interactions.

Individual differences in dissimilation: Do some people make more distinctions among targets' personalities than others?

Objective: People differ in how positively they tend to see others' traits, but people might also differ in how strongly they apply their perceptual styles. In two studies (Ns = 355, 303), the current research explores individual differences in how variable people's first impressions are across targets (i.e.

Robust Imaging of Speed of Sound Using Virtual Source Transmission.

Speed of sound (SoS) is a novel imaging biomarker for assessing the biomechanical characteristics of soft tissues. SoS imaging in the pulse-echo mode using conventional ultrasound (US) systems with hand-held transducers has the potential to enable new clinical uses. Recent work demonstrated that diverging waves (DWs) from a single element (SE) transmit to outperform plane-wave sequences.

Applying multimodal social relations analyses in personality pathology research.

In this article, we introduce multimodal social relations analysis as a powerful tool for studying personality pathology that tackles several important limitations of existing research. By implementing a design in which groups of participants provide repeated ratings as they interact, researchers can gather data on individuals' mutual perceptions, affective experiences, and interpersonal behaviors in naturalistic social contexts. We demonstrate how the social relations model can be used to analyze and make conceptual sense of these complex, dyadic data and showcase how this may be used to address not only the experiences and behaviors of individuals diagnosed with a personality disorder but also the reactions these individuals evoke in others.

Do Agency and Communion Explain the Relationship Between Perceiver and Target Effects in Interpersonal Perception? A Meta-Analysis on Generalized Reciprocity.

This meta-analysis examines generalized reciprocity, that is, the relationship between how people perceive others and how they are perceived by others. It tests the hypothesis that generalized reciprocity varies as a function of the content domain under investigation. Generalized reciprocity for attributes with primarily communal content (e.

Trait-specificity versus global positivity: A critical test of alternative sources of assumed similarity in personality judgments.

For decades, a recurring question in person perception research has been whether people's perceptions of others' personality traits are related to how they see themselves on these traits. Indeed, evidence for such "assumed similarity" effects has been found repeatedly, at least for certain characteristics. However, recent research suggests that these findings may be an artifact of individual differences in how positively or negatively perceivers see others in general, irrespective of trait-specific content.

Positivity in peer perceptions over time: Personality explains variation at zero-acquaintance, popularity explains differential change.

People have characteristic ways of perceiving others' personalities. When judging others on several traits, some perceivers tend to form globally positive and others tend to form globally negative impressions. These differences, often termed perceiver effects, have mostly been conceptualized as a static construct that taps perceivers' personal stereotypes about the average other.

Measuring Emotional Awareness in Patients With Schizophrenia and Schizoaffective Disorders.

The ability to mentalize (i.e., to form representations of mental states and processes of oneself and others) is often impaired in people with schizophrenia spectrum disorders.

Nonlinear Characterization of Tissue Viscoelasticity With Acoustoelastic Attenuation of Shear Waves.

Shear-wave elastography (SWE) measures shear-wave speed (SWS), which is related to the underlying shear modulus of soft tissue. SWS in soft tissue changes depending on the amount of external strain that soft tissue is subjected to due to the acoustoelastic (AE) phenomenon. In the literature, variations of SWS as a function of applied uniaxial strain were used for nonlinear characterization, assuming soft tissues to be elastic, although soft tissues are indeed viscoelastic in nature.

Speed-of-sound imaging using diverging waves.

Purpose: Due to its safe, low-cost, portable, and real-time nature, ultrasound is a prominent imaging method in computer-assisted interventions. However, typical B-mode ultrasound images have limited contrast and tissue differentiation capability for several clinical applications.

Methods: Recent introduction of imaging speed-of-sound (SoS) in soft tissues using conventional ultrasound systems and transducers has great potential in clinical translation providing additional imaging contrast, e.

Hemodynamic response to sensory stimulation in mice: Comparison between functional ultrasound and optoacoustic imaging.

Intense efforts are underway to develop functional imaging modalities for capturing brain activity at the whole organ scale with high spatial and temporal resolution. Functional optoacoustic (fOA) imaging is emerging as a new tool to monitor multiple hemodynamic parameters across the mouse brain, but its sound validation against other neuroimaging modalities is often lacking. Here we investigate mouse brain responses to peripheral sensory stimulation using both fOA and functional ultrasound (fUS) imaging.

Frequency-dependent attenuation reconstruction with an acoustic reflector.

Attenuation of ultrasound waves varies with tissue composition, hence its estimation offers great potential for tissue characterization and diagnosis and staging of pathology. We recently proposed a method that allows to spatially reconstruct the distribution of the overall ultrasound attenuation in tissue based on computed tomography, using reflections from a passive acoustic reflector. This requires a standard ultrasound transducer operating in pulse-echo mode and a calibration protocol using water measurements, thus it can be implemented on conventional ultrasound systems with minor adaptations.

Training Variational Networks With Multidomain Simulations: Speed-of-Sound Image Reconstruction.

Speed-of-sound (SoS) has been shown as a potential biomarker for breast cancer imaging, successfully differentiating malignant tumors from benign ones. SoS images can be reconstructed from time-of-flight measurements from ultrasound images acquired using conventional handheld ultrasound transducers. Variational networks (VNs) have recently been shown to be a potential learning-based approach for optimizing inverse problems in image reconstruction.

Influence of perceived threat of Covid-19 and HEXACO personality traits on toilet paper stockpiling.

Following the fast spread of Covid-19 across Europe and North America in March 2020, many people started stockpiling commodities like toilet paper. Despite the high relevance for public authorities to adequately address stockpiling behavior, empirical studies on the psychological underpinnings of toilet paper stockpiling are still scarce. In this study, we investigated the relation between personality traits, perceived threat of Covid-19, and stockpiling of toilet paper in an online survey (N = 996) across 22 countries.

Seeing the Best or Worst in Others: A Measure of Generalized Other-Perceptions.

How positively or negatively people generally view others is key for understanding personality, social behavior, and psychopathology. Previous research has measured generalized other-perceptions by relying on either explicit self-reports or judgments made in group settings. With the current research, we overcome the limitations of these past approaches by introducing a novel measurement instrument for generalized other-perceptions: the Online-Tool for Assessing Perceiver Effects (O-TAPE).

What is the structure of perceiver effects? On the importance of global positivity and trait-specificity across personality domains and judgment contexts.

When judging others' personalities, perceivers differ in their general judgment tendencies. These perceiver effects partly reflect a response bias but are also stable and psychologically important individual differences. However, current insights into the basic structure of perceiver effects are ambiguous with previous research pointing to either a unidimensional structure (i.

Can other-derogation be beneficial? Seeing others as low in agency can lead to an agentic reputation in newly formed face-to-face groups.

Whenever groups form, members readily and intuitively judge each other's agentic characteristics (e.g., self-confidence or assertiveness).

3D functional ultrasound imaging of pigeons.

Recent advances in ultrasound Doppler imaging have facilitated the technique of functional ultrasound (fUS) which enables visualization of brain-activity due to neurovascular coupling. As of yet, this technique has been applied to rodents as well as to human subjects during awake craniotomy surgery and human newborns. Here we demonstrate the first successful fUS studies on awake pigeons subjected to auditory and visual stimulation.