Dr Trish Ostwald

Conjoint Lecturer

School of Mathematical and Physical Sciences (Physics)

Career Summary

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

CodeDescriptionPercentage
110399Clinical Sciences not elsewhere classified100

Professional Experience

UON Appointment

DatesTitleOrganisation / Department
20/07/2012 - 30/11/2012Casual AcademicUniversity of Newcastle
School of Health Sciences
Australia
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Publications

For publications that are currently unpublished or in-press, details are shown in italics.


Journal article (17 outputs)

YearCitationAltmetricsLink
2014Surjan 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 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.

DOI10.1016/j.jevs.2014.04.005
Co-authorsHelen Warren-Forward
2008Greer 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]
DOI10.1111/j.1440-1673.2008.02006.x
CitationsScopus - 5Web of Science - 4
Co-authorsPeter Greer
2001Foulkes 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 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.

DOI10.1016/S0958-3947(01)00076-0
CitationsScopus - 5
1999Jeraj R, Keall PJ, Ostwald PM, 'Comparisons between MCNP, EGS4 and experiment for clinical electron beams', PHYSICS IN MEDICINE AND BIOLOGY, 44 705-717 (1999)
DOI10.1088/0031-9155/44/3/013Author URL
CitationsWeb of Science - 71
1999Ostwald PM, 'Determination of the dose distribution of therapeutic electrons at interfaces', MEDICAL PHYSICS, 26 1404-1404 (1999)
DOI10.1118/1.598640Author URL
1996Ostwald PM, Kron T, 'Variation in calculated effective source-surface distances with depth', PHYSICS IN MEDICINE AND BIOLOGY, 41 2067-2078 (1996)
DOI10.1088/0031-9155/41/10/015Author URL
CitationsScopus - 3Web of Science - 1
1996Ostwald PM, Kron T, 'Surface dose measurements for highly oblique electron beams', MEDICAL PHYSICS, 23 1413-1420 (1996)
DOI10.1118/1.597873Author URL
CitationsScopus - 12Web of Science - 9
1996Ostwald PM, Kron T, Hamilton CS, 'Assessment of mucosal underdosing in larynx irradiation', INTERNATIONAL JOURNAL OF RADIATION ONCOLOGY BIOLOGY PHYSICS, 36 181-187 (1996)
DOI10.1016/S0360-3016(96)00281-7Author URL
CitationsScopus - 23Web of Science - 17
1995OSTWALD 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)
DOI10.1016/0360-3016(95)00274-4Author URL
CitationsScopus - 17Web of Science - 12
1995DENHAM 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)
DOI10.1016/0167-8140(95)01545-RAuthor URL
CitationsScopus - 28Web of Science - 27
1995DENHAM 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)
DOI10.1016/0167-8140(95)01599-CAuthor URL
CitationsScopus - 27Web of Science - 28
1994OSTWALD PM, COOPER SG, DENHAM JW, HAMILTON CS, 'DOSIMETRY OF HIGH-ENERGY ELECTRON THERAPY TO THE PAROTID REGION', RADIOTHERAPY AND ONCOLOGY, 33 148-156 (1994)
DOI10.1016/0167-8140(94)90069-8Author URL
CitationsScopus - 6Web of Science - 3
1994OSTWALD 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)
Author URL
CitationsScopus - 6Web of Science - 6
1993OSTWALD 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)
Author URL
CitationsWeb of Science - 12
Co-authorsFred Menk, Brian Fraser, Colin Waters
1991KEAY CSL, OSTWALD PM, 'A LABORATORY TEST OF THE PRODUCTION OF ELECTROPHONIC SOUNDS', JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 89 1823-1824 (1991)
Author URL
CitationsWeb of Science - 10
1991Keay CSL, Ostwald PM, 'A laboratory test of the production of electrophonic sounds', Journal of the Acoustical Society of America, 89 1823-1824 (1991)
CitationsScopus - 3
1991WATERS CL, MENK FW, FRASER BJ, OSTWALD PM, 'PHASE-STRUCTURE OF LOW-LATITUDE PC3-4 PULSATIONS', PLANETARY AND SPACE SCIENCE, 39 569-& (1991)
DOI10.1016/0032-0633(91)90052-CAuthor URL
CitationsScopus - 15Web of Science - 23
Co-authorsColin Waters, Fred Menk, Brian Fraser
Show 14 more journal articles

Conference (4 outputs)

YearCitationAltmetricsLink
2006Greer 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-authorsPeter Greer
2006Greer 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-authorsPeter Greer
2004Tummers R, Harrison K, Ostwald PM, 'Commissioning and Dosimetric verification of a commercial electron Monte Carlo Planning algorithm', Conference Handbook, Geelong, Victoria (2004) [E3]
2004Harrison 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]
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Grants and Funding

Summary

Number of grants4
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 bodyCancer Council NSW
Project TeamConjoint Professor Peter Greer, Conjoint Professor Jim Denham, Dr Sebastien Ourselin, Dr Martin Ebert, Doctor Trish Ostwald, Dr Peter Lau
SchemeResearch Grant
RoleInvestigator
Funding Start2007
Funding Finish2007
GNoG0186637
Type Of FundingDonation - Aust Non Government
Category3AFD
UONY

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 bodyJohn Hunter Children`s Hospital Research Foundation
Project TeamDr Tomas Kron, Dr Michael Back, Doctor Trish Ostwald
SchemeResearch Grant (Defunct)
RoleInvestigator
Funding Start2000
Funding Finish2000
GNoG0180153
Type Of FundingOther Public Sector - State
Category2OPS
UONY

Optimising breast cancer therapy.$20,000

Funding body: Hunter Medical Research Institute

Funding bodyHunter Medical Research Institute
Project TeamDoctor Trish Ostwald, Conjoint Associate Professor Chris Hamilton, Dr Tomas Kron, Conjoint Professor Jim Denham
SchemeResearch Grant
RoleLead
Funding Start2000
Funding Finish2000
GNoG0180201
Type Of FundingContract - Aust Non Government
Category3AFC
UONY

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

Funding body: University of Newcastle

Funding bodyUniversity of Newcastle
Project TeamDoctor Trish Ostwald
SchemeNew Staff Grant
RoleLead
Funding Start2000
Funding Finish2000
GNoG0180145
Type Of FundingInternal
CategoryINTE
UONY
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Research Supervision

Current Supervision

CommencedResearch Title / Program / Supervisor Type
2011Brachytherapy in Periocular Equine SCC
Radiography, Faculty of Health and Medicine
Co-Supervisor

Past Supervision

YearResearch Title / Program / Supervisor Type
2014Technology Assessment and Quality Improvement in a Clinical HDR Brachytherapy Setting
Radiography, Faculty of Health and Medicine
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

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

Office

RoomRadiation Oncology Department
BuildingMater Hospital
LocationCallaghan
University Drive
Callaghan, NSW 2308
Australia
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