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    Australians are exposed to 2 millisieverts of 'background' radiation per year
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    A CT of the chest can be roughly equivalent to having 100 single chest X-rays
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    15x Melbourne → Singapore → London flights exposes you to 1 millisievert
  • Diagnostic X-rays

    A diagnostic X-ray is the oldest and most common medical radiology procedure. Radiologists use X-rays to help diagnose disease or injury inside your body. A machine directs a small, carefully calculated amount of radiation toward a specific part of the body to produce an image on a film on the other side of the body. Radiologists study the X-ray images to detect and diagnose disease or injury.

  • CT dosage

    Computed Tomography (CT) is currently one of the major contributors to the collective population radiation dose due to the increasing popularity of CT examinations as a non-invasive diagnostic tool. The evolution of CT scanner technology has turned their use from specialized into routine examination. More due diligence is required due to the high radiation dose of CT.

  • Where to from here?

    It is of the utmost importance that both clinical justification as well as technical optimization are implemented to maintain a high benefit to risk ratio. Solid interdisciplinary partnerships and research endeavours between clinical specialists and technology engineers will help to fast track developments in this area.

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LDI Alumni Profile

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R. Aidan Jamison

PhD graduate


Dept. Mechanical & Aerospace Engineering, Monash University Clayton Campus

Supervisors: Associate Professor Andreas Fouras and Professor Kerry Hourigan

Qualifications:

BEng(Mech, Hons) Monash 2008, PhD Monash 2016

Former OHS Roles:

Student Health & Safety Representative, Department of Mechanical & Aerospace Engineering, Clayton

PhD topic:

Imaging of flow and shear in vasculature disease models

Details:

Modeling of biological systems, both computationally and experimentally, is becoming more common as technological advances enable more accurate results to be obtained. However the ability to accurately measure blood flow velocities, and thus the shear stresses on vessel walls, in an in vivo environment, introduces several hurdles. This research initially investigates flow within microchannels using particle image velocimetry (PIV), with red blood cells (RBCs) as the tracer particles. It will then progress to investigate exteriorised blood vessels, with these experiments being conducted at the SPring-8 synchrotron in Japan, to enable the flow within the opaque vessels to be determined.

LDI Publications:

  1. Jamison, R.A., Samarage, C.R., Bryson-Richardson, R.J. & Fouras, A. (2013) In vivo wall shear measurements within the developing zebrafish heart. PLoS One, 8(10), e75722.
    doi: 10.1371/journal.pone.0075722
  2. Thurgood, J.B., Hooper, S.B., Siew, M.L., Wallace, M.J., Dubsky, S., Kitchen, M.J., Jamison, R.A., Carnibella, R.P. & Fouras, A. (2012) Functional Lung Imaging During HFV in Preterm Rabbits. PLoS One, 7(10), e48122.
    doi: 10.1371/journal.pone.0048122
  3. Jamison, R.A., Siu, K.K.W., Dubsky, S., Armitage, J.A. & Fouras, A. (2012) X-ray Velocimetry within the ex vivo carotid artery. Journal of Synchrotron Radiation, 19, 1050-1055.
    doi: 10.1107/S0909049512033912
  4. Jamison, R.A., Fouras, A. & Bryson-Richardson, R.B. (2012) Cardiac-Phase Filtering in Intracardiac Particle Image Velocimetry. Journal of Biomedical Optics, 17, 036007.
    doi: 10.1117/1.JBO.17.3.036007
  5. Invited Review:
    Jamison, R.A., Armitage, J.A., Carberry, J., Kitchen, M.J., Hooper, S.B. & Fouras, A. (2012) Functional imaging to understand biomechanics: a critical tool for the study of biology, pathology and the development of pharmacological solutions. Current Pharmaceutical Biotechnology, 13(11), 2128–2140.
    doi: 10.2174/138920112802502060
  6. Dubsky, S., Jamison, R.A., Higgins, S., Siu, K.K.W., Hourigan, K & Fouras, A. (2012) Computed Tomographic X-ray Velocimetry for simultaneous 3D measurement of velocity and geometry in opaque vessels. Experiments in Fluids. 52(3), 543–554.
    doi: 10.1007/s00348-010-1006-x
  7. Donnelley, M., Siu, K.K.W., Jamison, R.A. & Parsons, D.W. (2012) Synchrotron phase-contrast X-ray imaging reveals fluid dosing dynamics for gene transfer into mouse airways. Gene Therapy. 19, 8–14.
    doi: 10.1038/gt.2011.80
  8. Jamison, R.A., Dubsky, S., Siu, K.K.W., Hourigan, K. & Fouras, A. (2011) X-ray Velocimetry and haemodynamic forces within a stenosed femoral model at physiological flow rates. Annals of Biomedical Engineering, 39(6), 1643–1653.
    doi: 10.1007/s10439-011-0260-2
  9. Dubsky, S., Jamison, R.A., Irvine, S.C., Siu, K.K.W., Hourigan, K. & Fouras, A. (2010) Computed tomographic X-ray velocimetry, 6th International Conference on Medical Applications of Synchrotron Radiation, American Institute of Physics (AIP) Conference Proceedings, 1266, 35–38.
    doi: 10.1063/1.3478193
  10. Irvine, S.C., Paganin, D.M., Jamison, R.A., Dubsky, S. & Fouras, A. (2010) Vector tomographic X-ray phase contrast velocimetry utilizing dynamic blood speckle. Optics Express, 18(3), 2368–2379.
    doi: 10.1364/OE.18.002368
  11. Dubsky, S., Jamison, R.A., Irvine, S.C., Siu, K.K.W., Hourigan, K. & Fouras, A. (2010) Computed tomographic X-ray velocimetry. Applied Physics Letters. 96(2), 023702.
    doi: 10.1063/1.3285173
  12. PDF Download Jamison, R.A., Sheard, G.J., Ryan, K. & Fouras, A. (2009) The validity of axisymmetric assumptions when investigating pulsatile biological flows, ANZIAM Journal, 50, C713–C728.
    Also in Proc. 14th Biennial Computational Techniques and Applications Conference (CTAC'08), Australian National University, Canberra, ACT, Australia, 13-16 July 2008.

LDI Conferences/Seminars:

  1. Dubsky, S., Jamison, R.A., Higgins, S., Siu, K.K.W., Hourigan, K. & Fouras, A. (2010) Computed tomographic X-ray velocimetry for simultaneous measurement of 3D velocity and object geometry in opaque vessels, 15th International Symposium on Applications of Laser Techniques to Fluid Mechanics, Lisbon, Portugal, 5-8 July 2010.
  2. Jamison, R.A., Dubsky, S., Higgins, S., Siu, K.K.W., Hourigan, K. & Fouras, A. (2010) Synchrotron X-ray PIV of haemodynamic forces within a stenosed in vitro model at physiological flow rates, 15th International Symposium on Applications of Laser Techniques to Fluid Mechanics, Lisbon, Portugal, 5-8 July 2010.
  3. Dubsky, S., Jamison, R.A., Irvine, S.C., Siu, K.K.W., Hourigan, K. & Fouras, A. (2010) Computed tomographic X-ray velocimetry, in Proc. Medical Applications of Synchrotron Radiation — MASR 2010, Melbourne, Australia, 16–18 February 2010.
  4. PDF Download Chua, C.S., Sheard, G.J., Dubsky, S., Higgins, S., Jamison, R.A., Fouras, A. & Hourigan, K. (2009) Particle image velocimetry of non-axisymmetric stenosis models, in Proc. 8th International Symposium on Particle Image Velocimetry — PIV09, Melbourne, Australia, 25–28 August 2009.
  5. PDF Download Jamison, R.A., Fouras, A., Dubsky, S., Irvine, S.C., Siu, K.K.W., & Hourigan, K. (2009) Synchrotron X-ray PIV of blood flow in an optically opaque bifurcation model, in Proc. 8th International Symposium on Particle Image Velocimetry — PIV09, Melbourne, Australia, 25–28 August 2009.
  6. PDF Download Jamison, R.A., Sheard, G.J. & Ryan, K., (2007) Non-axisymmetric flow development in pulsatile blood flow through an aneurysm, In Proceedings of the 16th Australasian Fluid Mechanics Conference (Eds: P. Jacobs, T. McIntyre, M. Cleary, D. Buttsworth, D. Mee, R. Clements, R. Morgan & C. Lemckert; School of Engineering, The University of Queensland, ISBN: 978-1-864998-94-8), Crown Plaza, Gold Coast, Queensland, Australia, 3-7 December 2007, 353-360.

Monash Teaching experience:

  • Tutor & Specialist Lecturer: ENG1061 Engineering Profession, Monash University Clayton (2010–2011)
  • Tutor: MEC2404 Fluid Mechanics I, Monash University Clayton (2008 & 2010)
  • Tutor: MEC4427 Systems Integrity & Maintenance, Monash University Clayton (2008–2009)
  • Tutor: MEC4404 Professional Practice, Monash University Clayton (2009)