Results 131 to 140 of about 8,952 (260)

Instrumentation Digital Twins in PET and SPECT Imaging: Current Status, Challenges, and Future Directions. [PDF]

Comput Struct Biotechnol J
Azimi MS, Karakatsanis NA, Sabet H, Rafecas M, Nehmeh S, Alavi A, King M, Zaidi H.   +7 more
europepmc   +1 more source

Mesoscale Whole‐Brain T2*‐Weighted and Associated Quantitative MRI in Humans at 10.5 T

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To demonstrate mesoscale whole‐brain T2*‐weighted (T2*w) MRI at 10.5 T, quantify R2* relaxation rate and magnetic susceptibility (χ), and evaluate T2*w contrast at such high field strength. Methods Multi‐echo GRE (ME‐GRE) data were collected in healthy adults at 0.5 mm isotropic resolution at 10.5 T.
Jiaen Liu, Peter van Gelderen, Jacco A. de Zwart, Jeff H. Duyn, Yujia Huang, Shuxian Qu, Andrea Grant, Edward J. Auerbach, Matt Waks, Russell L. Lagore, Lance Delabarre, Alireza Sadeghi‐Tarakameh, Yigitcan Eryaman, Gregor Adriany, Kamil Uğurbil, Xiaoping Wu   +15 more
wiley   +1 more source

Sensitivity analysis of key CT simulation parameters and their impact on quality of virtual images. [PDF]

Med Phys
Montero I, Samei E, Abadi E.
europepmc   +1 more source

Self‐Supervised Deep Learning Framework for Rician Distribution Based Denoising and Modeling of Multi‐b Prostate Diffusion MRI

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose Convolutional neural networks (CNNs) are evaluated for improved and accelerated denoising and Rician bias correction in multi‐b DW images with simultaneous signal modeling. Methods Prostate diffusion images from 46 individuals acquired at 20 linearly distributed b‐values (bmax=2000s/mm2)$$ {b}_{\mathrm{max}}=2000\kern0.3em \mathrm{s}/{\
Mustafa Abbas, Wenyin Zhou, Stephan E. Maier, Fredrik Langkilde, Stefan Kuczera   +4 more
wiley   +1 more source

¹⁹F MRI radiomic features: in vitro and in vivo repeatability. [PDF]

Eur Radiol Exp
Maxouri O, Daal M, Vegna S, Rodríguez Sánchez DI, Rostami S, Ursprung S, Boeije M, Proost N, van de Ven M, Akkari L, Srinivas M, Bodalal Z, Beets-Tan R.   +12 more
europepmc   +1 more source

Investigating the Sensitivity of the Diffusion MRI Signal to Magnetization Transfer and Permeability via Monte‐Carlo Simulations

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose Magnetization transfer (MT) and water exchange via permeability operate on a similar spatiotemporal scale to water diffusion. In this study, we use a simulation‐based approach to characterize how MT and permeability impact (1) diffusion‐weighted MRI (dMRI) measurements from cylindrical substrates and (2) parameter estimation using a ...
Zhiyu Zheng, Karla L. Miller, Benjamin C. Tendler, Michiel Cottaar   +3 more
wiley   +1 more source

Impact of contrast agents on organ dosimetry in paediatric diagnostic fluoroscopy: the upper gastrointestinal series. [PDF]

Phys Med Biol
Smither WW, Borrego D, Applegate K, Bolch WE, Marshall EL.   +4 more
europepmc   +1 more source

The Impact and Reliability of Tissue Segmentation on In Vivo Magnetic Resonance Spectroscopy Metabolite Quantification

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose Quantification of metabolite concentrations using MRS requires tissue‐dependent signal corrections. Accurate estimation of voxel tissue composition is therefore essential. Commonly used brain tissue segmentation tools differ in their algorithms and implementation, potentially introducing variability in MRS‐derived concentration ...
Jessica Archibald, Kay Chioma Igwe, Antonia Kaiser, Karl Landheer, Jaimie Lee, John L. K. Kramer, Aaron T. Gudmundson, Helge J. Zöllner, Georg Oeltzschner, Candace C. Fleischer, Niklaus Zölch, Jamie Near, Mark Mikkelsen   +12 more
wiley   +1 more source

The Implementation and Application of a Saudi Voxel-Based Anthropomorphic Phantom in OpenMC for Radiological Imaging and Dosimetry. [PDF]

Diagnostics (Basel)
Alghamdi AAA.
europepmc   +1 more source

Simultaneous Assessment of Intracranial Artery and Paravascular CSF Pulsation Using 3D Whole‐Brain Diffusion‐Prepared Cine bSSFP (DECAF) MRI

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To propose a noninvasive and quantitative MRI approach to simultaneously assessing intracranial artery pulsation and paravascular cerebrospinal fluid (CSF) pulsation in the human brain. Methods We developed a 3D whole‐brain Diffusion‐prepared Cine bSSFP (DECAF) MRI technique, with improved motion‐sensitized driven‐equilibrium providing
Chang Ni, Xiangjian Hou, SeyyedKazem HashemizadehKolowri, Seong‐Eun Kim, Qiuting Wen, Nicholas A. Frost, J. Scott McNally, Chun Yuan, Xiaodong Ma   +8 more
wiley   +1 more source