Results 231 to 240 of about 82,070 (285)
Transceiver 16‐Channel Coaxial‐End Dipole Array for Combined Head and C‐Spine MRI at 9.4 T
A double‐row transceiver array consisting of 16 folded‐end coaxial‐end dipoles was designed. Curved dipole elements were aligned on a tight‐fitting, ergonomically shaped holder optimized for subject comfort. Transmit efficiency, B1+ field homogeneity, and SAR were numerically evaluated using EM‐simulations and optimized with respect to several ...
G. A. Solomakha +11 more
wiley +1 more source
Impact of 1.5 T Magnetic Field on Treatment Plan Quality in MR-Guided Radiotherapy: Typical Phantom Test Cases. [PDF]
Yan L, Xu Y, Dai J.
europepmc +1 more source
SP-0395: Challenges associated with MR guided radiotherapy
openaire +1 more source
We use synthetic (Aim 1), human brain (Aim 2) and phantom (Aim 3) data to assess how basis set choice affects Glu, tCr, tNAA and tCho quantification, focusing on the bias–variance trade‐off under varying SNR conditions. Including GABA, GSH, NAAG and glucose improved Glu estimates, reducing bias and variance below 10%.
Polina Emeliyanova +3 more
wiley +1 more source
Non‐Invasive, High‐Resolution (1H2O) Metabolic Activity Diffusion Imaging [MADI] of Rat Glioma
We employed Metabolic Activity Diffusion Imaging [MADI] and 18FDG‐PET in rats with syngeneic RG2 glioblastoma brain tumors. MADI quantifies kio (the cellular H2O efflux rate constant), cell volume (V), and cell density (ρ), without the use of contrast agents. The kioV product quantifies the rate of water efflux per cell.
Joshua W. Schlegel +9 more
wiley +1 more source
Porcine livers underwent mechanical perfusion inside an MRI scanner, enabling dynamic quantitative measurements of whole organ perfusion. Vascular segmentation down to 0.45 mm resolution allowed quantification of morphological features such as vessel tortuosity, while Dynamic Contrast Enhanced MRI and diffusion weighted imaging was used to produce ...
Zainab L. Rai +9 more
wiley +1 more source
Interobserver variability of histopathological assessment in pT1 colorectal carcinoma
Interobserver variability among 20 gastrointestinal pathologists was evaluated on 80 pT1 colorectal carcinoma cases. A pilot phase was followed by a consensus meeting, then a larger concordance study was performed. High interobserver agreement was achieved after consensus for histological grade, lymphovascular invasion, tumour budding, poorly ...
Karmele Saez de Gordoa +24 more
wiley +1 more source
Non-medicinal oral contrast in upper abdominal MRI for MR-guided radiotherapy: A scoping review.
Beasley MR +5 more
europepmc +1 more source
Abstract Background The expansion of treatment options for prostate cancer (PC) has improved disease‐specific and overall survival outcomes but has also raised questions about the optimal level of treatment needed for patients based on their individual prognosis and accounting for potential toxicity, incorporating quality of life considerations ...
Rana R. McKay +18 more
wiley +1 more source

