Naasiha Cassim | Searcharxiv

arXiv2026

Medical Physics and Biomedical Engineering Education, Training and Professional Development

Supporting and nurturing early career members is a vital component of succession planning for any profession or associations. Ensuring the thoughts and needs of newly-joined and early-career members of the Australasian College of Physical Sciences and Engineering in Medicine (ACPSEM) were represented and optimally met were key drivers in the creation of the New and Early career Special Interest Group (NESIG) in 2021. NESIG was incepted through the networking and collaboration of early career ACPSEM members who felt there was a need for such a group. The formation of this group was also motivated by data acquired from recent surveys highlighting motivation for initiatives that supported early career ACPSEM members. For example, the 2021 ACPSEM Radiation Oncology Medical Physics workforce survey showed overwhelming desire of early career members to be involved in student supervision, academic work and research. Similar themes have been identified in a Better Healthcare Technology survey on actions that would reduce barriers to ACPSEM members research and development work, and within other ACPSEM groups. Through consultation and guided by the findings of these surveys and discussions, NESIG will identify opportunities and initiatives for early career ACPSEM members that complement the existing ACPSEM training and mentoring programs. The development of this special interest group has been supported not only by the college but also other established groups, senior members of the field in both Australia and New Zealand and existing international early career groups. NESIG aims to provide stronger networking and collaboration amongst newly joined and early career members and on-going support and encouragement of activities tailored to NESIG members, to further support and nurture early career members for the benefit of individuals and the wider profession.

physics.ed-ph↗

arXiv2021

A Publicly Available Dataset of Out-of-Field Dose Profiles of a 6 MV Linear Accelerator

An increase in radiotherapy-induced secondary malignancies has led to recent developments in analytical modelling of out-of-field dose. These models must be validated against measurements, but currently available datasets are outdated or limited in scope. This study aimed to address these shortcomings by producing a large dataset of out-of-field dose profiles measured with modern equipment. A novel method was developed with the intention of allowing physicists in all clinics to perform these measurements themselves using commonly available dosimetry equipment. A standard 3D scanning water tank was used to collect 36 extended profiles. Each profile was measured in two sections, with the inner section measured with the beam directly incident on the tank, and the outer section with the beam incident on a water-equivalent phantom abutted next to the tank. The two sections were then stitched using a novel feature-matching approach. The profiles were compared against linac commissioning data and manually inspected for discontinuities in the overlap region. The dataset is presented as a publicly accessible comma separated variable file containing off-axis ratios at a range of off-axis distances. This dataset may be applied to the development and validation of analytical models of out-of-field dose. Additionally, it may be used to inform dose estimates to radiosensitive implants and anatomy. Physicists are encouraged to perform these out-of-field measurements in their own clinics and share their results with the community.

physics.med-ph↗