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Optical Calorimetry


Juergen Meyer, Ph.D.


The aim of this research is to develop a novel radiation dosimeter based on Digital Holographic Interferometry (DHI) for novel applications, such as e.g. microbeam radiotherapy or our small animal proton IGRT facility. DHI is an optical technique, which is capable of detecting miniscule radiation-induced temperature changes in a water phantom by means of a laser interferometer. The approach is based on digitally capturing laser interference patters, which are governed by the change in temperature of the irradiated medium. From these patterns the phase changes can be extracted and mathematically directly related to the radiation absorbed dose. The dosimeter is independent of radiation type and can resolve spatial variations in absorbed dose. A schematic overview of the approach is shown below. The current experimental set-up is based on a Lensless Fourier digital holography (LFTDH) approach and uses a CMOS camera for recording as shown in the second picture below.


Alicia Cavan,
Kaidi Liang,
Frederique Vanholsbeeck,
Adrien Carlu


A E Cavan and J Meyer, “Digital Holographic Interferometry: Development of an optical calorimetry technique for radiation dosimetry”, presented at Engineering and Physical Sciences in Medicine (EPSM 2012), Brisbane, Australia, 02-06 December 2012

A E Cavan and J Meyer, “A novel optical calorimetry dosimetry approach applied to an HDR Brachytherapy source” presented at IC3DDOSE “, presented at the 7th international conference on 3D radiation dosimetry, Sydney, Australia, 04-08 November, 2012

K Liang, “A fibre optics approach to radiation dosimetry”, MSc thesis, University of Canterbury, Christchurch, New Zealand, 2012

A Cavan, R Watts and J Meyer, ‘Initial investigation of digital holographic interferometry as a pseudo-calorimetric dosimetry method for microbeam radiotherapy (MRT)’, at New Zealand Institute of Physics (NZIP) Conference 2011, 17th – 19th October 2011, Wellington, New Zealand

A Cavan, P Wilson and J Meyer, A viscoelastic model of respiratory lung tumour motion, The New Zealand Medical Journal, Proceedings of the Health Research Society of Canterbury Seminar Series 123 (1313), 85 (2010).

A Cavan, A Carlu, J Meyer, ‘Pseudo-calorimetric dosimetry for Microbeam Radiotherapy (MRT) based on optical interference’, at Engineering and Physical Sciences in Medicine and the Australian Biomedical Engineering Conference (EPSM ABEC 2010), Melbourne, Australia, 05-09 December 2010

A Carlu, “The use of holographic interferometry to determine the ratio of refractive indices for a striated medium”, MDPH409 project report, University of Canterbury, Christchurch, New Zealand, 2010