A 90Sr Beta-ray Therapy Unit

A Beta-Ray Microscope.

Angular dependence of the output of a kilovoltage X‐ray therapy unit

During the recommissioning of a Philips RT-250 kilovoltage X-ray unit, unexpected output variations with tube head rotation (cross-plane) and tube head tilt (in-plane) were observed. The measured output showed an increase of up to 7.3% relative to the neutral position (0? in-plane and 0? cross-plane) over the possible range of angles of in-plane rotation for 75 kVp (half-value layer, HVL = 1.84...

A beta-ray spectrometer for coincidence measurements

An intermediate image beta-ray spectrometer has been constructed utilizing the focusing properties of a Ushaped magnetic field distribution. The construction and performance of the instrument are discussed. A transmission of ten percent has been attained with a resolution of about six percent. A scintillation spectrometer is used in conjunction with the intermediate image spectrometer for the p...

Beta thalassemia gene therapy using lentiviral vectors

Recent years, allogeneic bone marrow transplantation (BMT) has proved to be the successful cure for patients with thalassemia major, however this is restricted due to limited matched-related donor. Its complications include chronic graft-versus-host disease in 5-8% of patients. So, a molecular approach, such as gene therapy for direct normal beta globin gene transmission, seems quite promising ...

Evaluation of a Silicon 90Sr Betavoltaic Power Source

Betavoltaic energy converters (i.e., β-batteries) are attractive power sources because of their potential for high energy densities (>200 MWh/kg) and long duration continuous discharge (>1 year). However, conversion efficiencies have been historically low (<3%). High efficiency devices can be achieved by matching β-radiation transport length scales with the device physics length scales. In this...