Results 31 to 40 of about 1,345,844 (292)
Dose-response of deformable radiochromic dosimeters for spot scanning proton therapy
Physics and Imaging in Radiation Oncology, 2020 Intrafractional motion and deformation influence proton therapy delivery for tumours in the thorax, abdomen and pelvis. This study aimed to test the dose–response of a compressively strained three-dimensional silicone-based radiochromic dosimeter during ...
Simon V. Jensen +5 more
doaj +1 more source
Flat-Top Line-Shaped Beam Shaping and System Design
Sensors, 2022 In this study, the circular Gaussian spot emitted by a laser light source is shaped into a rectangular flat-top beam to improve the scanning efficiency of a selective laser sintering scanning system.
Che Liu, Yanling Guo
doaj +1 more source
Rare Tumors, 2019 Retroperitoneal chordomas are exceedingly rare and account for less than 5% of all primary bone malignancies. Their etiology remains unknown. We report a rare case of an extravertebral chordoma of the retroperitoneum in a 71-year-old man treated with ...
Nathan Y Yu, Sujay A Vora
doaj +1 more source
Sensors, 2021 The high-precision characterization of the intra-pixel sensitivity (IPS) for infrared focal plane array (FPA) photodetector is of great significance to high-precision photometry and astrometry in astronomy, as well as target tracking in under-sampled ...
Li Zhong +4 more
doaj +1 more source
Low-dose radiography by flying x-ray spot scanning (Lisar).
, 1969 Low-dose radiography can be achieved with flying x-ray spot scanning. An apparatus named 'LISAR', for Low-Intensity Scanning Apparatus for Radiography, was designed and built for the purpose of producing low-dose radiographs.
Baleshta, Theodore M.
core +1 more source
Preliminary analysis for integration of spot-scanning proton beam therapy and real-time imaging and gating [PDF]
, 2014 PURPOSE: Spot-scanning proton beam therapy (PBT) can create good dose distribution for static targets. However, there exists larger uncertainty for tumors that move due to respiration, bowel gas or other internal circumstances within the patients.
Umegaki, K. +6 more
core +1 more source
Pediatric Blood &Cancer, EarlyView.ABSTRACT Central nervous system (CNS) relapse of neuroblastoma carries a poor prognosis, and craniospinal irradiation (CSI) poses substantial long‐term toxicity in young children. We report a toddler with MYCN‐amplified neuroblastoma harboring somatic ALK R1275Q who developed extensive leptomeningeal relapse with paraplegia.
Jinwoo Kim +11 more
wiley +1 more source
FEBS Letters, EarlyView.CT10 regulator of kinase (CRK) and CRK‐Like (CRKL) are signaling adaptors driving cell adhesion, motility, differentiation, and proliferation. SH2‐domain containing (SH) proteins are enriched in YXXP motifs which when phosphorylated create preferred binding sites for CRK family SH2 domains.
Phoebe M. Cousens +8 more
wiley +1 more source
A proton beam therapy system dedicated to spot-scanning increases accuracy with moving tumors by real-time imaging and gating and reduces equipment size. [PDF]
PLoS ONE, 2014 PURPOSE: A proton beam therapy (PBT) system has been designed which dedicates to spot-scanning and has a gating function employing the fluoroscopy-based real-time-imaging of internal fiducial markers near tumors.
Shinichi Shimizu +7 more
doaj +1 more source
Reconstructing enzyme evolution by protein engineering
FEBS Letters, EarlyView.Natural enzyme evolution can be retraced by protein engineering methods such as directed evolution, rational design, and ancestral sequence reconstruction. These approaches reveal how enzymes emerged from ligand‐binding scaffolds, developed varying substrate preferences, formed oligomeric complexes, adapted to environmental changes, and evolved novel ...
Lukas Drexler +2 more
wiley +1 more source