Polarization of the light from the 3P(1)-2S(1) transition in proton beam excited helium

Measurements of the polarization of the light from the 3 1p-2 1s transition in proton beam excited Helium have shown both a proton beam energy and Helium target gas pressure dependence. Results for the linear polarization fraction range from +2.6% at 100 keV proton energy to -5.5% at 450 keV. The zero crossover occurs at approximately 225 keV. This is in good agreement with other experimental work in the field, but in poor agreement with theoretical predictions. Measurements at He target gas pressures as low as .01 mtorr show that the linear polarization fraction is still pressure dependent at .01 mtorr

American Association of Physicists in Medicine Radiation Therapy Committee Task Group 53: Quality assurance for clinical radiotherapy treatment planning

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/134846/1/mp8373.pd

Anniversary Paper: A sampling of novel technologies and the role of medical physicists in radiation oncology

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/135037/1/mp1006.pd

Extracorporeal Membrane Oxygenation as a Bridge to Cardiac Transplantation in Children

The feasibility and efficacy of extracorporeal membrane oxygenation (ECMO) as a bridge to cardiac transplantation was examined in 6 pediatric patients who suffered irreversible myocardial failure after undergoing surgery for congenital heart defects. The mean time of ECMO support was 260.5 h, range, 101-402 h. Three patients underwent transplantation, 2 of whom are long-term survivors. Progressive hypotension as a result of capillary leak syndrome precluded further ECMO support in the other 3 patients. Overall, 2 of the 6 patients survived. Major complications were encountered in 4 patients including bleeding in 2, a seizure in 1, and renal failure in 3, 2 of whom recovered renal function after transplantation. Infection did not occur in any of the 6 patients. Exchanging ECMO components was performed with no difficulties; these exchanges included a centrifugal pump once for 2 patients and a membrane oxygenator once for 3 patients. Our results indicate that ECMO can safely keep critically ill pediatric transplant candidates alive for more than 1 week with a low incidence of multiple organ failure

Foundation Library Specification and Virtual Machine Platform (VMP) Specification Radiotherapy Treatment Planning Tools Collaborative Working Group

this documen

A neural network based 3D∕3D image registration quality evaluator for the head-and-neck patient setup in the absence of a ground truth

Purpose: To develop a neural network based registration quality evaluator (RQE) that can identify unsuccessful 3D∕3D image registrations for the head-and-neck patient setup in radiotherapy