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Dr Mariusz Pietrzyk

PhD, Lancaster University, Lancaster, UK MSc in Physics with Medical Physics, Jagiellonian University, Krakow, Poland
Dr Mariusz Pietrzyk

C43M - M Block Cumberland Campus
The University of Sydney

Telephone +61 2 9351 9505

Website MIOPeG group

Biographical details

I have recently joined the Faculty of Health Sciences at the University of Sydney in the discipline of Medical Radiation Sciences, where, I am Postdoctoral Associate Research, Lecturer in Physics and International Research Project Coordinator. I am also Research Fellow at Brain and Mind Research Institute (BMRI), University of Sydney. My own research interests lie in the fields of Physics with Medical Physics Application, Psychophysics in Radiology, Visual Perception and Learning Machines implementation to Medical Imaging Analysis and Processing. I am currently building a research team at BMRI with following broad themes:
  • Spatial Frequency Analysis of Medical Images
  • Experts systems support a visual inspection of radiological scenes
  • Eye tracking application for radiological studies

Until recently, I was a Doctoral Researcher at the Lancaster University and the University of Cumbria, UK, where I was conducting several projects focusing on Medical Image Analysis and Visual Perception in Radiology. Eye Tracking was applied in the perception studies aiming to localise the distribution of visual attention, in both space and time relative to cognitive load during decision-making events. Assessment of radiological decision performance used the state of the art model based on Jackknife Free Response methodology. Moreover, several different techniques in image processing and analysis were developed. For example, Stationary Wavelet Packet Transforms were used to generate Spatial Frequency features of selected local Regions of Interest, upon which a certain type of overt or cover decision were made by human observers. These image properties were found be correlated with the subjects' responses.

In 2007, I became a Member of SPIE - The International Society for Optical Engineering, and since then, I have a privilege to participate and present my research at the SPIE Medical Imaging conference, which is one of the biggest scientific annual event in the field. In 2008, I was elected for a Full Member of The Institute of Physics (MIsntP).

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Teaching and supervision

  • Physics for 3rd year Radiography course (MRTY3107 Radiographic Physics 3)
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Selected grants

2013

  • Breast Cancer Detection Network; Pietrzyk M; Worldwide Universities Network/Research Support.
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Selected publications

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Journals

  • Alakhras, M., Bourne, R., Rickard, M., Ng, K., Pietrzyk, M., Brennan, P. (2013). Digital tomosynthesis: A new future for breast imaging? Clinical Radiology, Article online.
  • Rawashdeh, M., Bourne, R., Ryan, E., Lee, W., Pietrzyk, M., Reed, W., Borecky, N., Brennan, P. (2013). Quantitative Measures Confirm the Inverse Relationship between Lesion Spiculation and Detection of Breast Masses. Academic Radiology, 20(5), 576-580.
  • McEntee, M., Nikolovski, I., Bourne, R., Pietrzyk, M., Evanoff, M., Brennan, P., Tay, K. (2013). The Effect of JPEG2000 Compression on Detection of Skull Fractures. Academic Radiology, 20, 712-720.
  • Trieu, P., Brennan, P., Lee, W., Ryan, E., Reed, W., Pietrzyk, M. (2012). The value of the cranialcaudal mammographic view in breast cancer detection: A preliminary study. Macquarie Matrix, 2.2, 150-158.

Conferences

  • Pietrzyk, M., McDonald, S., Brennan, P., Bourne, R. (2013). Can k-space weighting affect the ease of detection of simple objects in MR images?. 9th Annual Scientific Meeting of Medical Imaging and Radiation Therapy, Sydney: Australian Institute of Radiography.
  • McEntee, M., Nikolovski, I., Bourne, R., Pietrzyk, M., Evanoff, M., Brennan, P., Tay, K. (2012). Does JPEG lossy compression disguise cranial fractures?. European Congress of Radiology ECR 2012, Vienna, Austria: European Society of Radiology.
  • Littlefair, S., Brennan, P., Williams, (., Pietrzyk, M. (2012). Does the thinking aloud condition affect the search for pulmonary nodules?. Medical Imaging 2012: Image Perception, Observer Performance, and Technology Assessment, Bellingham, WA: SPIE Society of Photo-Optical Instrumentation Engineers.
  • Pietrzyk, M., Zohrer, F., Harz, M., McEntee, M., Hahn, H., Haygood, T., Evanoff, M., Brennan, P. (2012). Effect of morphing between unenhanced and multi-scale enhanced chest radiographs on pulmonary nodule detection. Medical Imaging 2012: Image Perception, Observer Performance, and Technology Assessment, Bellingham, WA: SPIE Society of Photo-Optical Instrumentation Engineers.
  • Pietrzyk, M., McDonald, J., Brennan, P., Bourne, R. (2012). Effect of selective suppression of spatial frequency domain noise on visual detection of a simple object in an inhomogeneous background. Medical Imaging 2012: Image Perception, Observer Performance, and Technology Assessment, Bellingham, WA: SPIE Society of Photo-Optical Instrumentation Engineers.
  • Pietrzyk, M., Rannou, D., Brennan, P. (2012). Implementation of combined SVM-algorithm and computer-aided perception feedback for pulmonary nodule detection. Medical Imaging 2012: Image Perception, Observer Performance, and Technology Assessment, Bellingham, WA: SPIE Society of Photo-Optical Instrumentation Engineers.
  • Pietrzyk, M., McEntee, M., Evanoff, M., Brennan, P. (2012). Indirect detection of pulmonary nodules on low-pass filtered and original x-ray images during limited and unlimited display times. Medical Imaging 2012: Image Perception, Observer Performance, and Technology Assessment, Bellingham, WA: SPIE Society of Photo-Optical Instrumentation Engineers.
  • McEntee, M., Lowe, J., Butler, M., Pietrzyk, M., Evanoff, M., Ryan, J., Brennan, P., Rainford, L. (2012). iPads and LCDs show similar performance in the detection of pulmonary nodules. Medical Imaging 2012: Image Perception, Observer Performance, and Technology Assessment, Bellingham, WA: SPIE Society of Photo-Optical Instrumentation Engineers.
  • Li, Y., Brennan, P., Lee, W., Ryan, J., Cawson, J., Nickson, C., Reed, W., Pietrzyk, M., Al Mousa, D., Ryan, E. (2012). Outlining and categorising mammographic breast density: expert radiologist perception. Medical Imaging 2012: Image Perception, Observer Performance, and Technology Assessment, Bellingham, WA: SPIE Society of Photo-Optical Instrumentation Engineers.
  • Nikolovski, I., McEntee, M., Bourne, R., Pietrzyk, M., Evanoff, M., Brennan, P., Tay, K. (2012). The effect of compression on confidence during the detection of skull fractures in CT. Medical Imaging 2012: Image Perception, Observer Performance, and Technology Assessment, Bellingham, WA: SPIE Society of Photo-Optical Instrumentation Engineers.
  • Pietrzyk, M., Donovan, T., Brennan, P., Dix, A., David, M. (2011). Classification of radiological errors in Chest Radiographs, using Support Vector Machine on the Spatial Frequency features of False-Negative and False-Positive regions. Medical Imaging 2011: Image Perception, Observer Performance, and Technology Assessment, Bellingham, Washington USA: SPIE - International Society for Optical Engineering.
  • Morrison, A., Brennan, P., Reed, W., Pietrzyk, M., Schembri, G., Bailey, E., Roach, P., Evanoff, M., Kench, P. (2011). Impact of hybrid SPECT/CT imaging on the detection of single parathyroid adenoma. Medical Imaging 2011: Image Perception, Observer Performance, and Technology Assessment, Bellingham, Washington USA: SPIE - International Society for Optical Engineering.
  • Pietrzyk, M., Manning, D., Donovan, T., Dix, A. (2010). Implication of the first decision on visual information-sampling in the spatial frequency domain in pulmonary nodule recognition. Medical Imaging 2010: Image Perception, Observer Performance, and Technology Assessment, United States: SPIE - International Society for Optical Engineering.
  • Pietrzyk, M., Manning, D., Donovan, T., Dix, A. (2009). Local spatial frequency image properties and radiological decisions. Medical Image Understanding and Analysis (MIUA) 2009, United Kingdom: British Machine Vision Association.
  • Pietrzyk, M., Manning, D., Donovan, T., Dix, A. (2009). Perceptual indicators of the holistic view in pulmonary nodule detection. Medical Image Perception Society (MIPS) XIII Conference 2009. Not applicable.
  • Pietrzyk, M., Manning, D., Dix, A., Donovan, T. (2009). Spatial frequency characteristics at image decision-point locations for observers with different radiological backgrounds in lung nodule detection. Medical Imaging 2009: Image Perception, Observer Performance, and Technology Assessment, Bellingham, Washington, USA: SPIE - International Society for Optical Engineering.
  • Pietrzyk, M., Manning, D., Dix, A., Donovan, T. (2008). Relations between physical properties of local and global image-based elements and the performance of human observers in lung nodule detection. Medical Imaging 2008: Image Perception, Observer Performance, and Technology Assessment, USA: SPIE - International Society for Optical Engineering.

2013

  • Pietrzyk, M., McDonald, S., Brennan, P., Bourne, R. (2013). Can k-space weighting affect the ease of detection of simple objects in MR images?. 9th Annual Scientific Meeting of Medical Imaging and Radiation Therapy, Sydney: Australian Institute of Radiography.
  • Alakhras, M., Bourne, R., Rickard, M., Ng, K., Pietrzyk, M., Brennan, P. (2013). Digital tomosynthesis: A new future for breast imaging? Clinical Radiology, Article online.
  • Rawashdeh, M., Bourne, R., Ryan, E., Lee, W., Pietrzyk, M., Reed, W., Borecky, N., Brennan, P. (2013). Quantitative Measures Confirm the Inverse Relationship between Lesion Spiculation and Detection of Breast Masses. Academic Radiology, 20(5), 576-580.
  • McEntee, M., Nikolovski, I., Bourne, R., Pietrzyk, M., Evanoff, M., Brennan, P., Tay, K. (2013). The Effect of JPEG2000 Compression on Detection of Skull Fractures. Academic Radiology, 20, 712-720.

2012

  • McEntee, M., Nikolovski, I., Bourne, R., Pietrzyk, M., Evanoff, M., Brennan, P., Tay, K. (2012). Does JPEG lossy compression disguise cranial fractures?. European Congress of Radiology ECR 2012, Vienna, Austria: European Society of Radiology.
  • Littlefair, S., Brennan, P., Williams, (., Pietrzyk, M. (2012). Does the thinking aloud condition affect the search for pulmonary nodules?. Medical Imaging 2012: Image Perception, Observer Performance, and Technology Assessment, Bellingham, WA: SPIE Society of Photo-Optical Instrumentation Engineers.
  • Pietrzyk, M., Zohrer, F., Harz, M., McEntee, M., Hahn, H., Haygood, T., Evanoff, M., Brennan, P. (2012). Effect of morphing between unenhanced and multi-scale enhanced chest radiographs on pulmonary nodule detection. Medical Imaging 2012: Image Perception, Observer Performance, and Technology Assessment, Bellingham, WA: SPIE Society of Photo-Optical Instrumentation Engineers.
  • Pietrzyk, M., McDonald, J., Brennan, P., Bourne, R. (2012). Effect of selective suppression of spatial frequency domain noise on visual detection of a simple object in an inhomogeneous background. Medical Imaging 2012: Image Perception, Observer Performance, and Technology Assessment, Bellingham, WA: SPIE Society of Photo-Optical Instrumentation Engineers.
  • Pietrzyk, M., Rannou, D., Brennan, P. (2012). Implementation of combined SVM-algorithm and computer-aided perception feedback for pulmonary nodule detection. Medical Imaging 2012: Image Perception, Observer Performance, and Technology Assessment, Bellingham, WA: SPIE Society of Photo-Optical Instrumentation Engineers.
  • Pietrzyk, M., McEntee, M., Evanoff, M., Brennan, P. (2012). Indirect detection of pulmonary nodules on low-pass filtered and original x-ray images during limited and unlimited display times. Medical Imaging 2012: Image Perception, Observer Performance, and Technology Assessment, Bellingham, WA: SPIE Society of Photo-Optical Instrumentation Engineers.
  • McEntee, M., Lowe, J., Butler, M., Pietrzyk, M., Evanoff, M., Ryan, J., Brennan, P., Rainford, L. (2012). iPads and LCDs show similar performance in the detection of pulmonary nodules. Medical Imaging 2012: Image Perception, Observer Performance, and Technology Assessment, Bellingham, WA: SPIE Society of Photo-Optical Instrumentation Engineers.
  • Li, Y., Brennan, P., Lee, W., Ryan, J., Cawson, J., Nickson, C., Reed, W., Pietrzyk, M., Al Mousa, D., Ryan, E. (2012). Outlining and categorising mammographic breast density: expert radiologist perception. Medical Imaging 2012: Image Perception, Observer Performance, and Technology Assessment, Bellingham, WA: SPIE Society of Photo-Optical Instrumentation Engineers.
  • Nikolovski, I., McEntee, M., Bourne, R., Pietrzyk, M., Evanoff, M., Brennan, P., Tay, K. (2012). The effect of compression on confidence during the detection of skull fractures in CT. Medical Imaging 2012: Image Perception, Observer Performance, and Technology Assessment, Bellingham, WA: SPIE Society of Photo-Optical Instrumentation Engineers.
  • Trieu, P., Brennan, P., Lee, W., Ryan, E., Reed, W., Pietrzyk, M. (2012). The value of the cranialcaudal mammographic view in breast cancer detection: A preliminary study. Macquarie Matrix, 2.2, 150-158.

2011

  • Pietrzyk, M., Donovan, T., Brennan, P., Dix, A., David, M. (2011). Classification of radiological errors in Chest Radiographs, using Support Vector Machine on the Spatial Frequency features of False-Negative and False-Positive regions. Medical Imaging 2011: Image Perception, Observer Performance, and Technology Assessment, Bellingham, Washington USA: SPIE - International Society for Optical Engineering.
  • Morrison, A., Brennan, P., Reed, W., Pietrzyk, M., Schembri, G., Bailey, E., Roach, P., Evanoff, M., Kench, P. (2011). Impact of hybrid SPECT/CT imaging on the detection of single parathyroid adenoma. Medical Imaging 2011: Image Perception, Observer Performance, and Technology Assessment, Bellingham, Washington USA: SPIE - International Society for Optical Engineering.

2010

  • Pietrzyk, M., Manning, D., Donovan, T., Dix, A. (2010). Implication of the first decision on visual information-sampling in the spatial frequency domain in pulmonary nodule recognition. Medical Imaging 2010: Image Perception, Observer Performance, and Technology Assessment, United States: SPIE - International Society for Optical Engineering.

2009

  • Pietrzyk, M., Manning, D., Donovan, T., Dix, A. (2009). Local spatial frequency image properties and radiological decisions. Medical Image Understanding and Analysis (MIUA) 2009, United Kingdom: British Machine Vision Association.
  • Pietrzyk, M., Manning, D., Donovan, T., Dix, A. (2009). Perceptual indicators of the holistic view in pulmonary nodule detection. Medical Image Perception Society (MIPS) XIII Conference 2009. Not applicable.
  • Pietrzyk, M., Manning, D., Dix, A., Donovan, T. (2009). Spatial frequency characteristics at image decision-point locations for observers with different radiological backgrounds in lung nodule detection. Medical Imaging 2009: Image Perception, Observer Performance, and Technology Assessment, Bellingham, Washington, USA: SPIE - International Society for Optical Engineering.

2008

  • Pietrzyk, M., Manning, D., Dix, A., Donovan, T. (2008). Relations between physical properties of local and global image-based elements and the performance of human observers in lung nodule detection. Medical Imaging 2008: Image Perception, Observer Performance, and Technology Assessment, USA: SPIE - International Society for Optical Engineering.
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