User Meeting 2014

Session

Beamlines, Instrumentation and Techniques I

Nov 20, 2014, 3:30 PM

National Centre for Synchrotron Science

Conveners

Beamlines, Instrumentation and Techniques I

• Chris Hall (Australian Synchrotron)

110. X-ray Imaging at IMBL: Detailed Considerations of Contrast and Resolution

Dr Andrew Stevenson (Australian Synchrotron/ CSIRO)

11/20/14, 3:30 PM

Beamlines, Instrumentation and Techniques

Oral

The Imaging and Medical Beamline (IMBL) at the Australian Synchrotron has three hutches, centred at 22, 36 and 140m from the source, in which user experiments are performed. Radiotherapy experiments are currently performed in the first of these hutches, and imaging (including tomography) in the second and third hutches. The X-ray source is provided by a superconducting multipole wiggler...

78. Absolute Dosimetry using a Graphite Calorimeter on the Imaging and Medical Beamline at the Australian Synchrotron

Dr Peter Harty (ARPANSA)

11/20/14, 3:50 PM

Beamlines, Instrumentation and Techniques

Oral

In 2012-13, the Australian Synchrotron installed a superconducting multi-pole wiggler (SCMPW) on the imaging and medical beamline (IMBL) with the intention of future preclinical radiotherapy trials. Before moving to such trials, accurate knowledge of the dose delivered is required to calibrate the secondary dosimeters in regular use. When this is resolved, clinical use of the Australian...

48. Characterisation of the PTW microDiamond detector for high spatial resolution dosimetry in microbeam radiation therapy at IMBL

Dr Jayde Livingstone (Australian Synchrotron)

11/20/14, 4:10 PM

Beamlines, Instrumentation and Techniques

Oral

Microbeam radiation therapy (MRT) at IMBL is based on arrays of 50&mu m wide x-ray beams with a pitch of 400&mu m. The peak-to-valley dose ratio (PVDR) is the ratio of the peak dose to the dose between the microbeams and is an important radiobiological quantity. Accurate measurements of the PVDR require a dosimeter with high spatial resolution, dose rate independence and water equivalence for...

58. Spatial dosimetric response of an ionisation chamber to kilovoltage synchrotron radiation by 2D scanning in a sub-millimetre beam

Dr Duncan Butler (ARPANSA)

11/20/14, 4:30 PM

Radiotherapy and Radiobiology

Oral

The IMBL at the Australian Synchrotron is able to provide high-brightness kilovoltage radiation in the energy range 20 – 200 keV. A PTW 30013 Farmer-type ionisation chamber was scanned through a point-like (sub-millimetre) beam and the ionisation signal from the chamber was recorded as a function of position. In this way an image was constructed from the spatial dosimetric response of the...