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Research
Staff: Dr Katie McMahon
RESEARCH FELLOW
Address:
MRI Cardiac and Research Centre
B2 Western Annexe
Wesley Hospital
Brisbane Qld 4069
E-mail address: Katie
McMahon
Telephone: +61-7-3232 7315
Fax: +61-7-3232 7121
Home Page: Katie
McMahon
Career Profile:
Research Fellow
Katie McMahon serves a pivotal role in implementing and maintaining
sequences on all four whole-body scanners, situated at the University
of Queensland, Wesley and Royal Brisbane Hospitals. She completed
her PhD in MR Physics in 1999, and has significant experience in sequence
programming on both Bruker and Siemens platforms. She has been an
invited speaker at Siemens Users Meeting and local SMRT Regional Education
Seminar.
Research Interests:
The major focus of the functional MRI research
group is cognitive neuroimaging and neuroscience, primarily in the
areas of memory and language processing. Additional collaborative
work is being done to examine the cognitive acquisition of likes and
dislikes, structural and functional imaging in schizophrenia (encompassing
high resolution, DTI, fMRI and spectroscopy), genetic differences
in twin development (structural, DTI and spatial N-back task), effects
of acupuncture in carpel tunnel syndrome, stimulation of the human
visual cortex, and aspects of neuroendocrinology. As an MR Physicist,
Katie McMahon is involved in implementation and application of EPI
methods in fMRI as well as sequence and system optimisations to facilitate
the neuroimaging program. Examples of this include the development
of a novel image acquisition sequence that permits overt vocalisation
during functional imaging, which has vastly improved language production
paradigms, and the optimisation of image quality and sound levels
in EPI at high field. Katie is proficient with the installation, design,
implementation and maintenance of numerous imaging methods; and has
substantial experience with the idiosyncrasies of the MR scanner hardware.
This researcher has additional interests in optimised diffusion tensor
imaging, sodium imaging, and the study of muscle extension during
flexing.
Research Support:
ARC Discovery, $271000, 2004-2006; ARC Discovery, $176000, 2004-2006;
UQ-NSR, $10.5K, 2003; Pfizer, $141K, 2003-2004; 3 x NHMRC Neuroimaging
consortium grants $3K each, 2001.
Current Research Support:
NIH, $499K per year (USD), 2006-2011; NSR $55K 2006; IPF $2K 2006;
WRI, $24.5K, 2006-2007.
Patents:
Eddy-Current Compensated and Optimised Diffusion Imaging Sequence,
McMahon K., Griffin M., Rose S., US Patent No 6,815,952, 2004.
Selected Publications:
| » |
Mullen, K.T., Dumoulin, S.O., McMahon, K.L., de
Zubicaray, G.I. and Hess, R.F. (2007). Selectivity of human retinoptic
visual cortex of S cone opponent, L/M cone opponent and achromatic
stimulation. European Journal of Neuroscience. Accepted
November 16, 2006. |
| » |
de Zubicaray, G., MAHON, K., Eastburn, M., Pringle,
A., Lorenz, L., Humphreys and M.S. (2007). Support for an auto-associative
model of spoken cued recall: Evidence from fMRI. Neuropyschologia
45(4): 824-835. |
| » |
deZubicaray, G., McMAHON, K., Eastburn, M., Pringle,
A. and Lorenz, L.(2006) Classic identity negative priming involves
accessing semantic representations in the left anterior temporal
cortex. NeuroImage 33: 383-390. |
| » |
de Zubicaray, G., McMAHON, K., Eastburn, M. and
Pringle, A. (2006). Top-down influences on lexical selection during
spoken word production: An fMRI investigation of refractory effects
in picture naming, Human Brain Mapping 27:
864-873. |
| » |
Rose, S.E., McMahon, K.L., Janke, A.L., O'Dowd,
B., de Zubicaray, G., Strudwick, M.W. and Chalk, J.B. (2006).
MRI diffusion indices and neuropsychological performance in mild
cognitive impairment. Journal of Neurology, Neurosurgery and
Pscyhiatry 77: 1122-1128. |
| » |
Hides, J., Wilson, S., Stanton, W., McMAHON, S.,
Keto, H., McMahon, K., Bryant, M. and Richardson,C. (2006). An
MRI Investigation into the function of the transversus abdominus
muscle during “drawing-in” of the abdominal wall.
Spine 31(6): E175-8. |
| » |
Rose, S.E., Janke, A.L., Strudwick, M.W., McMAHON,
K.L., Chalk, J.B., Snyder, P. and de Zubicaray, G.I. (2006). Assessment
of dynamic susceptibility contrast cerebral blood flow response
to amphetamine challenge: A human pharmacological MRI (phMRI)
study at 1.5 and 4T. Magnetic Resonance in Medicine 55:
9-15, 2006. |
| » |
Weekes, B., de Zubicaray, G., McMAHON, K., Eastburn
M., Bryant, M. and Wang D. (2005). Orthographic effects on picture
naming in Chinese: a 4T erfMRI study. Brain and Language
95:14-15. |
| » |
deZubicaray, G., McMahon, K., Eastburn, M.M.,
Finnigan, S. and Humphries, M.S. (2005). fMRI evidence of word
frequency and strength effects in recognition memory. Cognitive
Brain Research, 24(3): 587-598. |
| » |
deZubicaray G., McMahon K., Eastburn M.M., Finnigan
S. and Humphries M.S. (2005). fMRI evidence of word frequency
and strength effects during episodic memory encoding. Cognitive
Brain Research, 22(3):439-450. |
| » |
Finnigan, S., Rose, S.E., Walsh, M., Griffin,
M., Janke, A.L., McMahon, K.L., Gillies, R., Strudwick, M.W.,
Pettigrew, C.M., Semple, J. and Chalk, J.B. (2004). Correlation
of quantitative EEG with 30 day NIHSS score in acute ischemic
stroke: A comparison with diffusion and perfusion MRI. Stroke
35(4): 899-903. |
| » |
Copland, D., de Zubicaray, G., McMahon, K., Wilson,
S.J., Eastburn, M.M., Chenery, H.J. (2003). Brain activity during
automatic semantic priming revealed by event-related fMRI. NeuroImage
20: 302-310. |
»
|
de Zubicaray, G.I., McMahon, K.L.,
Eastburn, M.M. and Wilson, S.J. (2002). Orthographic/phonological
facilitation of naming responses in the picture-word task: An
event-related fMRI study using overt vocal responding. Neuroimage
16: 1084-1093. |
»
|
Lepage, M., McMahon, K., Galloway,
G.J., De Deene, Y., Bäck, S.Å.J. and Baldock, C. (2002).
Magnetization transfer imaging for polymer gel dosimetry. Phys.
Med. Biol. 47: 1881-1890. |
| » |
Toftegaard, C.L., McMahon, K.L.,
Galloway, G.J. and Bradley, A.J. (2002). Processing of urinary
pheromones in Antechinus stuartii (Marsupialia: Daszyurdiae):
Functional magnetic resonance imaging of the brain. Mammology
83: 71-80. |
| »
|
de Zubicaray, G.I., McMahon, K.L.,
Wilson, S.J. and Muthiah, S. (2001). The semantic interference
effect in the picture-word paradism: An event-related fMRI study
employing overt responses. Human Brain Mapping 14:
218-227. |
| »
|
de Zubicaray, G.I., Wilson, S.J.,
McMahon, K.L. and Muthiah, S. (2001). Brain activity during the
encoding, retention and retrieval of stimulus representations.
Learning and Memory 8: 243-251. |
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(23 Papers, 6 Submitted Papers, 38 Conference Presentations, 100
ISI Citations)
Presentation at SMRT November
2006
Poster presented at ISMRM Conference,
2004.
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