Dr Trish Ostwald

Conjoint Lecturer

School of Mathematical and Physical Sciences (Physics)

Career Summary

Biography

Research Expertise
* Electron beam treatment planning; Investigation of the accuracy of Electron planning algorithms, including Hogstrom type algorithms and Electron Monte Carlo, and the dosimetric evaluation of these algorithms. * MRI-based prostate therapy planning; The use of MRI images for prostate radiotherapy planning including the mapping of electron density to the MR scans for dose calculation.

Qualifications

  • Doctor of Philosophy, University of Newcastle
  • Bachelor of Science (Honours), University of Newcastle
  • Master of Science, University of Newcastle

Keywords

  • MRI images
  • Mathematical physics
  • Physical Sciences

Fields of Research

Code Description Percentage
110399 Clinical Sciences not elsewhere classified 100
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Publications

For publications that are currently unpublished or in-press, details are shown in italics.


Journal article (17 outputs)

Year Citation Altmetrics Link
2014 Surjan Y, Donaldson D, Ostwald P, Milross C, Warren-Forward H, 'A Review of Current Treatment Options in the Treatment of Ocular and/or Periocular Squamous Cell Carcinoma in Horses: Is There a Definitive "Best" Practice?', Journal of Equine Veterinary Science, (2014) [C1]

This review examines the most commonly reported treatment options for ocular squamous cell carcinoma (OSCC) and periocular squamous cell carcinoma (POSCC) in horses and proposes t... [more]

This review examines the most commonly reported treatment options for ocular squamous cell carcinoma (OSCC) and periocular squamous cell carcinoma (POSCC) in horses and proposes to conclude on the most viable method based on available published studies in terms of treatment outcome, known side effects, advantages, disadvantages, and reliability of available evidence. After a literature search for peer-reviewed published articles, seven most commonly reported on treatments for OSCC and/or POSCC were identified: surgery, photodynamic therapy, carbon dioxide (CO2) laser ablation, radiofrequency hyperthermia, cryotherapy, chemotherapy, and radiation therapy. Combination therapies were supported as a most successful recommendation; however, when considering site-specific outcomes, the following conclusions may be drawn: limbal squamous cell carcinoma (SCC) was most effectively treated with surgery and adjunctive therapy including CO2 laser ablation, mitomycin C, and brachytherapy; third eyelid SCC reported good outcomes when treated with surgery alone (clear margins) and in combination with brachytherapy for unclear margins; eyelid SCC, surgical resection was usually limited and most reports supported the use of adjunctive brachytherapy, although photodynamic therapy appeared to be a promising new treatment. It was deemed unreasonable to conclude on the best treatment for cornea, conjunctivae (palpebral and bulbar), and medial canthi in isolation because of lack of evidence. A consistently favored treatment for OSCC and/or POSCC in horses does not currently exist. The presentation of data in the literature and its lack of consistency make it impossible to statistically analyze and make comparative conclusions on treatment outcomes. This review provides a basis for further research to establish a best-practice protocol. © 2014 Elsevier Inc. All rights reserved.

DOI 10.1016/j.jevs.2014.04.005
Co-authors Helen Warren-Forward
2008 Greer PB, Dahl K, Ebert MA, White M, Wratten C, Ostwald PM, et al., 'Assessment of a daily online implanted fiducial marker-guided prostate radiotherapy process', Journal of Medical Imaging and Radiation Oncology, 52 517-524 (2008) [C1]
DOI 10.1111/j.1440-1673.2008.02006.x
Citations Scopus - 5Web of Science - 4
Co-authors Peter Greer
2001 Foulkes KM, Ostwald PM, Kron T, 'A clinical comparison of different film systems for radiotherapy portal imaging', Medical Dosimetry, 26 281-284 (2001)

Portal films are an important tool for verification of the shaping and positioning of external radiation fields to the target volume in radiotherapy. One limitation of port films ... [more]

Portal films are an important tool for verification of the shaping and positioning of external radiation fields to the target volume in radiotherapy. One limitation of port films is their inherent lack of contrast, which is due to the low attenuation of the exposing megavoltage radiation by the tissues being imaged. Recently, Kodak introduced a new portal film-cassette system, Kodak EC-L, with much improved contrast compared with conventional film. The aim of this study was to determine if the enhanced contrast of the Kodak EC-L system actually provides better clinical results. To simulate clinical use, port films were taken using an anthropomorphic phantom that was artificially shifted and/or rotated by a predetermined distance. Identical images were taken using a conventional port film system (AGFA-Gevaert Curix MR4 in lead-lined cassette) and the Kodak EC-L system. Twelve different operators (6 physicists and 6 radiation therapists) were asked to diagnose the problem from a total of 20 port films (10 per treatment site), allowing for direct comparison of the 2 types of films. While the diagnosis of the field displacement improved using the Kodak film, it did not speed-up the decision-making process. It was also found that experienced operators were more accurate at evaluating the films. The results indicate that, for the situations studied (head and neck, pelvis), the Kodak system exhibits better contrast and leads to improved decision making. Copyright © 2001 Elsevier Science Inc.

DOI 10.1016/S0958-3947(01)00076-0
Citations Scopus - 5
1999 Jeraj R, Keall PJ, Ostwald PM, 'Comparisons between MCNP, EGS4 and experiment for clinical electron beams', PHYSICS IN MEDICINE AND BIOLOGY, 44 705-717 (1999)
DOI 10.1088/0031-9155/44/3/013
Citations Web of Science - 72
1999 Ostwald PM, 'Determination of the dose distribution of therapeutic electrons at interfaces', MEDICAL PHYSICS, 26 1404-1404 (1999)
DOI 10.1118/1.598640
1996 Ostwald PM, Kron T, 'Variation in calculated effective source-surface distances with depth', PHYSICS IN MEDICINE AND BIOLOGY, 41 2067-2078 (1996)
DOI 10.1088/0031-9155/41/10/015
Citations Scopus - 3Web of Science - 1
1996 Ostwald PM, Kron T, 'Surface dose measurements for highly oblique electron beams', MEDICAL PHYSICS, 23 1413-1420 (1996)
DOI 10.1118/1.597873
Citations Scopus - 12Web of Science - 9
1996 Ostwald PM, Kron T, Hamilton CS, 'Assessment of mucosal underdosing in larynx irradiation', INTERNATIONAL JOURNAL OF RADIATION ONCOLOGY BIOLOGY PHYSICS, 36 181-187 (1996)
DOI 10.1016/S0360-3016(96)00281-7
Citations Scopus - 23Web of Science - 17
1995 OSTWALD PM, KRON T, HAMILTON CS, DENHAM JW, 'CLINICAL USE OF CARBON-LOADED THERMOLUMINESCENT DOSIMETERS FOR SKIN DOSE DETERMINATION', INTERNATIONAL JOURNAL OF RADIATION ONCOLOGY BIOLOGY PHYSICS, 33 943-950 (1995)
DOI 10.1016/0360-3016(95)00274-4
Citations Scopus - 17Web of Science - 12
1995 DENHAM JW, HAMILTON CS, SIMPSON SA, OBRIEN MY, OSTWALD PM, KRON T, DEAR KBG, 'ACUTE REACTION PARAMETERS FOR HUMAN OROPHARYNGEAL MUCOSA', RADIOTHERAPY AND ONCOLOGY, 35 129-137 (1995)
DOI 10.1016/0167-8140(95)01545-R
Citations Scopus - 28Web of Science - 27
1995 DENHAM JW, HAMILTON CS, SIMPSON SA, OSTWALD PM, OBRIEN M, KRON T, et al., 'FACTORS INFLUENCING THE DEGREE OF ERYTHEMATOUS SKIN REACTIONS IN HUMANS', RADIOTHERAPY AND ONCOLOGY, 36 107-120 (1995)
DOI 10.1016/0167-8140(95)01599-C
Citations Scopus - 27Web of Science - 28
1994 OSTWALD PM, COOPER SG, DENHAM JW, HAMILTON CS, 'DOSIMETRY OF HIGH-ENERGY ELECTRON THERAPY TO THE PAROTID REGION', RADIOTHERAPY AND ONCOLOGY, 33 148-156 (1994)
DOI 10.1016/0167-8140(94)90069-8
Citations Scopus - 6Web of Science - 3
1994 OSTWALD PM, METCALFE PE, DENHAM JW, HAMILTON CS, 'A COMPARISON OF 3 ELECTRON PLANNING-ALGORITHMS FOR A 16 MEV ELECTRON-BEAM', INTERNATIONAL JOURNAL OF RADIATION ONCOLOGY BIOLOGY PHYSICS, 28 731-740 (1994)
Citations Scopus - 6Web of Science - 6
1993 OSTWALD PM, MENK FW, FRASER BJ, WATERS CL, MCNABB PW, 'SPATIAL AND TEMPORAL CHARACTERISTICS OF 15-100 MHZ ULF WAVES RECORDED ACROSS A LOW-LATITUDE AZIMUTHAL ARRAY', ANNALES GEOPHYSICAE-ATMOSPHERES HYDROSPHERES AND SPACE SCIENCES, 11 742-752 (1993)
Citations Web of Science - 12
Co-authors Fred Menk, Brian Fraser, Colin Waters
1991 KEAY CSL, OSTWALD PM, 'A LABORATORY TEST OF THE PRODUCTION OF ELECTROPHONIC SOUNDS', JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 89 1823-1824 (1991)
Citations Web of Science - 10
1991 Keay CSL, Ostwald PM, 'A laboratory test of the production of electrophonic sounds', Journal of the Acoustical Society of America, 89 1823-1824 (1991)
Citations Scopus - 4
1991 WATERS CL, MENK FW, FRASER BJ, OSTWALD PM, 'PHASE-STRUCTURE OF LOW-LATITUDE PC3-4 PULSATIONS', PLANETARY AND SPACE SCIENCE, 39 569-& (1991)
DOI 10.1016/0032-0633(91)90052-C
Citations Scopus - 15Web of Science - 23
Co-authors Colin Waters, Fred Menk, Brian Fraser
Show 14 more journal articles

Conference (4 outputs)

Year Citation Altmetrics Link
2006 Greer PB, Dahl K, Ostwald PM, Denham J, Lau P, Hughes C, White M, 'An investigation of MRI dose planning for high precision prostate radiotherapy', Australasian Physical & Engineering Sciences in Medicine, Noosa, Australia (2006) [E3]
Co-authors Peter Greer
2006 Greer PB, Dahl K, Ostwald PM, Pichler P, Denham J, Wratten C, White M, 'Initial clinical experience with implanted fiducial guided prostate radiotherapy', Australasian Physical & Engineering Sciences in Medicine, Noosa, Australia (2006) [E3]
Co-authors Peter Greer
2004 Tummers R, Harrison K, Ostwald PM, 'Commissioning and Dosimetric verification of a commercial electron Monte Carlo Planning algorithm', Conference Handbook, Geelong, Victoria (2004) [E3]
2004 Harrison KM, Tummers R, Ostwald PM, Ebert MA, Kron T, 'Evaluation of an electron conformal bolus technique for treatment of the internal mammary chain using Monte Carlo modelling', Program Handbook & Book of Abstracts, Perth (2004) [E3]
Show 1 more conference
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Grants and Funding

Summary

Number of grants 4
Total funding $359,750

Click on a grant title below to expand the full details for that specific grant.


20071 grants / $301,750

High precision MRI based prostate radiotherapy$301,750

Funding body: Cancer Council NSW

Funding body Cancer Council NSW
Project Team Conjoint Professor Peter Greer, Conjoint Professor Jim Denham, Dr Sebastien Ourselin, Dr Martin Ebert, Doctor Trish Ostwald, Dr Peter Lau
Scheme Research Grant
Role Investigator
Funding Start 2007
Funding Finish 2007
GNo G0186637
Type Of Funding Donation - Aust Non Government
Category 3AFD
UON Y

20003 grants / $58,000

Assessment of radiation dose to lung and other normal structures in children undergoing radiotherapy.$34,000

Funding body: John Hunter Children`s Hospital Research Foundation

Funding body John Hunter Children`s Hospital Research Foundation
Project Team Dr Tomas Kron, Dr Michael Back, Doctor Trish Ostwald
Scheme Research Grant (Defunct)
Role Investigator
Funding Start 2000
Funding Finish 2000
GNo G0180153
Type Of Funding Other Public Sector - State
Category 2OPS
UON Y

Optimising breast cancer therapy.$20,000

Funding body: Hunter Medical Research Institute

Funding body Hunter Medical Research Institute
Project Team Doctor Trish Ostwald, Conjoint Associate Professor Chris Hamilton, Dr Tomas Kron, Conjoint Professor Jim Denham
Scheme Research Grant
Role Lead
Funding Start 2000
Funding Finish 2000
GNo G0180201
Type Of Funding Contract - Aust Non Government
Category 3AFC
UON Y

Modelling radiotherapy machines for more accurate dose calculation.$4,000

Funding body: University of Newcastle

Funding body University of Newcastle
Project Team Doctor Trish Ostwald
Scheme New Staff Grant
Role Lead
Funding Start 2000
Funding Finish 2000
GNo G0180145
Type Of Funding Internal
Category INTE
UON Y
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Research Supervision

Number of supervisions

Completed1
Current1

Total current UON EFTSL

PhD0.05

Current Supervision

Commenced Level of Study Research Title / Program / Supervisor Type
2011 PhD Brachytherapy in Periocular Equine SCC
Radiography, Faculty of Health and Medicine, The University of Newcastle
Co-Supervisor

Past Supervision

Year Level of Study Research Title / Program / Supervisor Type
2014 PhD Technology Assessment and Quality Improvement in a Clinical HDR Brachytherapy Setting
Radiography, Faculty of Health and Medicine, The University of Newcastle
Co-Supervisor
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Dr Trish Ostwald

Position

Conjoint Lecturer
Medical Physics Group
School of Mathematical and Physical Sciences
Faculty of Science and Information Technology

Focus area

Physics

Contact Details

Email patricia.ostwald@newcastle.edu.au
Phone (02) 401 43606
Fax (02) 401 43610

Office

Room Radiation Oncology Department
Building Mater Hospital
Location Callaghan
University Drive
Callaghan, NSW 2308
Australia
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