Medical Physicist at St George Cancer Center, Sydney. Special interest in brachytherapy. Opinions are my own and not the views of my employer

Sydney, New South Wales
Joined September 2019
Hao et al: spiral 4DCT vs breathing-adapted Direct i4D in 33 patients with irregular breathing. ✅ Better image quality ⚠️ Small, selected cohort; fixed scan order; improved delineation accuracy not validated. doi.org/10.1016/j.meddos.202… #MedicalPhysics
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📣 📣📣 We’re hiring! 📣 📣📣 Join us at St George Hospital, Sydney, as a Medical Physics Postdoc, advancing same-day simulation-to-treatment for patients with brain metastases. More info and apply below iworkfor.nsw.gov.au/job/st-g…
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The potential underlying physics here makes sense. High Z material adjacent to OAR = ⬆️ prob of photoelectric effect
Can a simple finding on CT predict tox after prostate SBRT? Excited to share our newly published study! Pts with periurethral calcifications had higher risk of developing acute gr2+ gu tox. A simple, cost-free biomarker that warrants further study. 🔗 doi.org/10.1016/j.ctro.2026.…
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Could we further reduce radiation-induced lymphopenia by using SABR to < irradiated volumes and # fx where appropriate, while optimising plans to reduce circulating blood dose? An important consideration as RT and immunotherapy become increasingly integrated.
Nice work! Study shows more RT fx > more lymphocyte depletion > worse OS. Palliative RT setting, but relevant to definitive/SBRT. Post-RT lymphocyte = underutilized biomarker IMO (though cheap, routinely collected) but increasingly important w more RT/IO integration. @OncoAlert
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Critical trial, ProtecT, shows surgery and radiotherapy have equal cancer control. Favorable sexual preservation and less incontinence with radiation #pcsm #prostatecancer #ASTRO26
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Always intrigued by brachy studies published with such high toxicity, as we’ve seen in other studies it can be much better. doi.org/10.1016/j.ijrobp.202… doi.org/10.1016/j.radonc.202… What drives these differences? Hoping we can answer via ENCOMPASS registry encompassbrachy.org/
I’ve been saying this for years… Now we have randomized data. GETUG P05: brachytherapy boost vs dose-escalated EBRT in intermediate-risk prostate cancer. Oncologic outcomes similar but far more toxicity with brachy. #ASTRO26 #ProstateCancer @ASTRO_org @NehaVapiwala @AmarUKishan @DrAndrewLoblaw @seanmmcbride @HimanshuNagarMD @TylerSbrt @seanmmcbride @alison_tree @Soum_Roy_RadOnc @NicholasZaorsky @angela_jia_
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This will be a game changer for oligometastatic SBRT
Replying to @DrSpratticus
#astro26 Can treat multi target liver to 10 Gy in single breath hold of ~20 sec. Speed like never before. Thanks to our clinical trials, physics, RTTs, dosimetrists, physicians and the whole team for the immense work that went into to being one of the only sites in the world to already have this technology!
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Fascinating! In a world where submissions to journals are tending towards work performed with assistance from AI, the responsibility of reviewers and AEs has never been greater. If ever there was an argument for improved recognition of this service, this is it!
Terence Tao, one of the most well known mathematicians, speaks up on AI in mathematics in his new paper: “What if an AI tool generates a lengthy proof that is verified to be correct, but which nobody — 𝘯𝘰𝘵 𝘦𝘷𝘦𝘯 𝘵𝘩𝘦 𝘩𝘶𝘮𝘢𝘯𝘴 𝘸𝘩𝘰 𝘱𝘳𝘰𝘮𝘱𝘵𝘦𝘥 𝘵𝘩𝘦 𝘵𝘰𝘰𝘭 — understands? This is no longer hypothetical. Sites devoted to collecting mathematical problems already contain dozens of AI-generated proof submissions. Many of these are likely to be correct; but in a substantial number of cases no human expert has yet volunteered to verify and vouch for them, and in several cases the human submitters have themselves declared that they are not qualified to do so. We may soon be faced with the very real possibility of a verified proof of a major result that NO HUMAN understands well enough to explain. For a proof to actually contribute to its field, then, it is NOT enough for it to be correct, and NOT enough for it to be readable. It also needs to be accepted and valued by the community: other mathematicians need to 𝗱𝗶𝗴𝗲𝘀𝘁 𝘁𝗵𝗲 𝗿𝗲𝘀𝘂𝗹𝘁 𝗮𝗻𝗱 𝗶𝗻𝗰𝗼𝗿𝗽𝗼𝗿𝗮𝘁𝗲 𝗶𝘁 𝗶𝗻𝘁𝗼 𝘁𝗵𝗲𝗶𝗿 𝗼𝘄𝗻 𝘄𝗼𝗿𝗸. Our current publication infrastructure relies on human editors and referees to provide this acceptance, voluntarily and largely without credit. This work is routinely regarded as less prestigious than the work of generating proofs in the first place; but it is an essential component of the profession, and it is precisely the mechanism by which the individual achievements of mathematicians are converted into collective progress and understanding. Finally, even publication is not the last stage. Key results should ultimately become part of the definitive textbooks and reference material of their subject, in the form in which 𝘁𝗵𝗲𝘆 𝗮𝗿𝗲 𝘁𝗮𝘂𝗴𝗵𝘁 𝘁𝗼 𝘁𝗵𝗲 𝗻𝗲𝘅𝘁 𝗴𝗲𝗻𝗲𝗿𝗮𝘁𝗶𝗼𝗻 𝗼𝗳 𝘀𝘁𝘂𝗱𝗲𝗻𝘁𝘀. This process of canonicalization is the slowest stage of all. It requires broad, deliberative consensus, and it is the stage least amenable to optimization by AI tools.” 📍 Terence Tao concludes: “We will transition from an era of proof scarcity to an era of proof abundance. Most of our institutions — journals, priority conventions, hiring and promotion criteria, prizes, the very notion of a research program — were designed under the assumption of scarcity, and it should not surprise us if they behave poorly under abundance. In some areas, particularly in education and in the training of young mathematicians, it will be crucial to emphasize 𝘁𝗵𝗲 𝗶𝗿𝗿𝗲𝗱𝘂𝗰𝗶𝗯𝗹𝘆 𝗵𝘂𝗺𝗮𝗻 𝗮𝘀𝗽𝗲𝗰𝘁 of our work, and to restrict the use of AI tools quite tightly; the goal of training a mathematician is NOT achieved by producing correct homework. In other areas, we will need to take the initiative on AI usage, and define best practices for incorporating these tools into our workflows on our own terms rather than on terms set for us by vendors.” __ [I highlighted & capitalized words in the text for clarity]
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🌏 Today is World Brachytherapy Awareness Day. Proud to work alongside an incredible multidisciplinary team delivering brachytherapy and helping advance patient care through research, innovation and collaboration. #ThisIsBrachytherapy
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Joel Poder retweeted
Local salvage therapies alone for #ProstateCancer recurrence after radiotherapy maintained >75% androgen deprivation therapy–free survival at 2 years with manageable rates of severe adverse events, supporting their use in selected patients. ja.ma/4aQLVz6
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🎗️ 20 Days Until #BrachytherapyAwarenessDay 🌸 Interventional Radiotherapy for Breast Cancer Accelerated Partial Breast Irradiation (APBI) with HDR #Brachytherapy 📊 10-Year GEC-ESTRO Results: 🎯 Local recurrence: 2.5% ❤️ Overall survival: 95% 😊 Excellent cosmetic outcome: >85% 🛡️ Acute Grade ≥2 toxicity: 5% 💡 Precise treatment. 🛡️ Less healthy tissue irradiated. ⏳ Shorter treatment. ❤️ Better quality of life. #Interventional_Radiotherapy #BreastCancer #APBI #HDRBrachytherapy #RadiationOncology #PrecisionMedicine #ThisIsBrachytherapy @oncodaily @UroGec @OncoDailyRT
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Loved to see this: 🔥Bringing Biology to Brachy🔥 At the Annual Meeting of the @AmericanBrachy Society, co-sponsored by @RRS_RadRes, organized by @SMarkovina2 in #LosAngeles🙏 "Lost in Translation"😉 americanbrachytherapy.org/me… We should do more of these #radbio collaborations‼️
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Fantastic long term data for HDR boost. Very interesting to see lower side effect profile for TRUS based over CT based planning. More confidence in contouring or greater certainty in needle positioning at time of treatment? @agomeziturriaga @KamravaMD
¡Otro gran trabajo en #ESTRO2026! Compartimos los resultados a largo plazo de la braquiterapia HDR boost en cáncer de próstata (TC based vs TRUS). Datos robustos con más de 10 años de seguimiento medio que avalan un excelente control y supervivencia de los pacientes.
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Happy to share that the first manuscript from the ENCOMPASS prostate brachytherapy consortium has now been published in @BrachyJournal sciencedirect.com/science/ar… @PBlanchardMD @MarioTerlizziFR @agomeziturriaga @DrAmanTaggar @ArjitB_medphys
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This type of work is helping inform the development of larger international collaborative initiatives under ENCOMPASS, focused on outcomes, workflows, imaging, dosimetry, and quality assurance in prostate brachytherapy.
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Huge thank you to all collaborators, participating institutions, and international brachytherapy societies who helped distribute and support the survey. Publication available here: authors.elsevier.com/sd/arti… #Brachytherapy #RadiationOncology #MedicalPhysics #RadOnc
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I do wonder for these IR patients getting brachytherapy that LDR is a better option. Our institutional BCR are lower than what’s been reported. Of course this is also single site - our ENCOMPASS consortium is working on a prospective registry to collect this data internationally
We've applied to pool data from our site and NRG 0232 (LDR +/- EBRT) and 0538 (SBRT arm). Stay tuned!
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