19 papers · ranked by Valyu relevance
Gisella Gennaro, Moreno Zanardo, Federico Ambrogi, Francesco Sardanelli
Phantom studies are essential in medical imaging, offering a controlled and reproducible framework for evaluating imaging technologies across all modalities. Phantoms, whether physical (synthetic, biological, or mixed) or computational, simulate human tissues or anatomical structures and serve roles in technology…
Padriac Hooper, Jin Jin, Kieran O’Brien, Monique Tourell + 2 more
Quantitative susceptibility mapping (QSM) is an MR technique that depicts and precisely quantifies spatial biodistributions from MR phase images. Recently, QSM has gained much uptake as method for mapping iron and identifying calcium. However, QSM as a quantitative method needs an objective reference to assess its…
Dongyang Yi, Kevin Lat, Lei Chen
Development of novel neural interfaces faces buckling challenges and heavily relies on trial-and-error tests via in vivo animal brain insertions for design optimizations towards the minimal-damaging version for enhanced recording and stimulation outcome. To enable low-cost and fast-turnaround neural interface…
Amar Kavuri, Mini Das
Purpose: Digital phantoms are one of the key components of virtual imaging trials (VITs) that aims to assess and optimize new medical imaging systems and algorithms. However, these phantoms vary in their voxel resolution, appearance and structural details. This study aims to examine whether and how variations between…
Shuai Chang, Joel Pearson
The constructive nature of vision is perhaps most evident during hallucinations, mental imagery, synesthesia, perceptual filling-in, and many illusions in which conscious visual experience does not overtly correspond to retinal stimulation: phantom vision. However, the relationship between voluntary and involuntary…
Amani Yousef Owda, Alexander J. Casson
Gelatine based phantoms for electrophysiology are becoming widely used as they allow the controlled validation of new electrode and new instrumentation designs. The phantoms mimic the electrical properties of the human body and allow a pre-recorded electrophysiology signal to be played-out, giving a known signal for…
Nikolay Dukov, Vanessa-Mery Valkova, Mariana Yordanova, Virginia Tsapaki + 2 more
This study investigates the feasibility of employing an in-house-developed physical phantom dedicated to the weekly quality control testing of radiographic systems, performed by radiographers. For this purpose, a 3D phantom was fabricated, featuring test objects, including a model representing a lesion. Alongside this…
Roberto Fedrigo, W. Paul Segars, Patrick Martineau, Claire Gowdy + 3 more
'Ingrid Bloise' 'Carlos Uribe' 'Arman Rahmim'] Purpose: The XCAT phantom allows for highly sophisticated multimodality imaging research. It includes a complete set of organs, muscle, bone, soft tissue, while also accounting for age, sex, and body mass index (BMI), which allows phantom studies to be performed at a…
Yuanyuan Lyu, Xiaoli Guo, Robin Bekrater-Bodmann, Herta Flor + 1 more
'Shanbao Tong'] A potential contributor to impaired motor imagery in amputees is an alteration of the body schema as a result of the presence of a phantom limb. However, the nature of the relationship between motor imagery and phantom experiences remains unknown. In this study, the influence of phantom limb perception…
Loïc Daumail, Randolph Blake, Frank Tong
The constructive nature of motion perception has been highlighted in studies of the visual phantom illusion. Visual phantoms can occur when two low-contrast collinear drifting gratings are separated by a blank gap, leading to the ghostly impression of drifting stripes that extend through the gap. Although previous work…
Amanda S. Therrien, Cortney Howard, Laurel J. Buxbaum
Many individuals who undergo limb amputation experience persistent phantom limb pain (PLP). The underlying mechanism of PLP is unknown, but the phenomenon has been associated with reorganization in sensorimotor cortex following amputation. The traditional view is that cortical reorganization degrades the missing limb’s…
Xaver Fuchs, Martin Diers, Jörg Trojan, Pinar Kirsch + 7 more
After limb amputation, most amputees suffer from phantom limb pain (PLP). The mechanisms underlying this condition are complex and insufficiently understood. Altered somatosensory sensitivity (either heightened or lowered) might contribute to PLP. Recent studies have tested this assumption but mainly focused on the…
Galin Gyulchev, Ivan Zh. Stefanov
In some models dark energy is described by phantom scalar fields (scalar fields with "wrong" sign of the kinetic term in the lagrangian). In the current paper we study the effect of phantom scalar field and/or phantom electromagnetic field on gravitational lensing by black holes in the strong deflection regime. The…
Authors not listed
Heptamethine cyanine dyes are widely used as near-infrared (NIR) fluorophores in biomedical imaging. However, conventional heptamethine cyanine fluorophores are symmetric in nature which favors fluorophore self-assembly from π–π stacking in aqueous media. This aggregation significantly reduces fluorescence intensity…
Kacey Roehrich, Mary Goldberg, Goeran Fiedler, Tao Liu
Phantom limb pain, a common challenge for amputees, lacks effective treatment options. Vibration therapy is a promising non-pharmacologic intervention for reducing pain intensity, but its efficacy in alleviating phantom limb pain requires further investigation. This study focused on developing prosthesis liners with…
Hongyang Dong, Simon D.M. Jacques, Keith T. Butler, Olof Gutowski + 4 more
In this study, we introduce a method designed to eliminate parallax artefacts present in Xray powder diffraction computed tomography data acquired from large samples. These parallax artefacts manifest as artificial peak shifting, broadening and splitting, leading to inaccurate physicochemical information, such as…
Agda M. Andreotti, Marcelo C. Goiato, Eduardo P. Pellizzer, Aldiéris A. Pesqueira + 3 more
'Aldiéris A. Pesqueira' 'Aimée M. Guiotti' 'Humberto Gennari-Filho' 'Daniela M. dos Santos'] The purpose of this literature review was to describe the main features of phantom eye syndrome in relation to their possible causes, symptoms, treatments, and influence of eye amputation on quality of life of anophthalmic…
A. Fannjiang, Zhuosheng Zhang
Three boundary conditions are considered in the simulations: periodic, dark-field and bright-field boundary conditions. The dark-field boundary condition is suited for isolated objects while the bright-field boundary condition is for non-isolated objects. The periodic boundary condition is a mathematically convenient…
Brandon Horn, Judith Balk, Jeffrey I. Gold
The misuse of sham controls in examining the efficacy or effectiveness of Complementary and Alternative Medicine has created numerous problems. The theoretical justification for incorporating a sham is questionable. The sham does not improve our control of bias and leads to relativistic data that, in most instances…