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Full-Text Articles in Radiology

Magnetically Focused Proton Irradiation Of Small Volume Radiosurgery Targets Using A Triplet Of Quadrupole Magnets, Patrick Mcgee, Grant Mcauley, Andrew Wroe, James M. Slater, Jerry D. Slater Dec 2017

Magnetically Focused Proton Irradiation Of Small Volume Radiosurgery Targets Using A Triplet Of Quadrupole Magnets, Patrick Mcgee, Grant Mcauley, Andrew Wroe, James M. Slater, Jerry D. Slater

Loma Linda University Student Journal

Proton therapy is an advantageous choice for the irradiation of tumors in proximity of critical structures due to rapid dose fall off and high dose deposition at target compared to dose at the surface of the patient (ie, peak-to-entrance dose ratio (P/E)). However, with target fields below 1.0 cm, as often encountered in proton radiosurgery, multiple Coulomb scattering (MCS) broadens proton beams leading to diminished P/E advantages and reduced dose delivery efficiency (DDE). Magnetic focusing tends to counteract MCS and is a promising method to reduce these undesirable effects. The purpose of this research is to investigate the advantages of …


Diffusion Tensor Imaging Findings In Pediatric Patients With Mild Traumatic Brain Injury, Tshea Dowers, B L. Bartnik, Barbara Holshouser, Stephen Ashwal, Samuel Barnes Dec 2017

Diffusion Tensor Imaging Findings In Pediatric Patients With Mild Traumatic Brain Injury, Tshea Dowers, B L. Bartnik, Barbara Holshouser, Stephen Ashwal, Samuel Barnes

Loma Linda University Student Journal

Approximately 14% of school age children with sports-related concussions (SRC) remain symptomatic 3 months after injury. Previous studies have used diffusion tensor imaging (DTI) to detect white matter tract changes in regions of interest in symptomatic patients; however data in the pediatric population remains limited. This study was undertaken to determine whether DTI metrics can provide valuable information in pediatric mTBI patients with persistent symptoms.