Building a peer-review framework for radiation therapy plans

A radiotherapy plan carries consequences that extend well beyond the planning console. Before a beam is shaped or a fraction delivered, a structured peer-review program provides a final safety net and a learning opportunity for the team. For departments working across public hospitals, private networks, and regional clinics, formalising that review is one of the most reliable ways to lift the standard of care.

In Australia, radiotherapy is delivered through a patchwork of state-run services, private providers such as Icon and GenesisCare, and university-affiliated cancer centres. Each setting brings its own case mix, staffing profile, and IT environment, which means a peer-review program cannot be lifted wholesale from one site to another. It needs to be tailored to local workflow while still meeting the expectations of accrediting bodies and the Australasian College of Physical Scientists and Engineers in Medicine.

The lessons discussed at the proton therapy sessions reinforced how rapidly treatment complexity is changing. As more centres adopt adaptive planning, motion management, and hypo-fractionated schedules, the pressure on planners grows. Peer review is no longer a courtesy; it is a core component of safe modern practice, and it deserves the same rigour as any other quality assurance activity.

This article walks through the practical steps for establishing a peer-review program in a radiation therapy department. It covers scope, team composition, workflow integration, documentation, and sustainability, with Australian-specific considerations woven throughout. Whether the program is being built from scratch or refreshed after an audit finding, the principles below can help shape a process that lasts.

Defining the scope and objectives of the review

The first step is to set a clear boundary around what the program will and will not cover. A common starting point is the prospective review of curative intent plans for breast, prostate, head and neck, lung, and gastrointestinal sites, with palliative cases handled through a lighter-touch process. Being explicit about scope stops the program from collapsing under its own weight in the first few months.

Objectives should be written down before the workflow is finalised. Typical aims include catching geometric misses, confirming dose constraints are met, checking contour consistency, and identifying opportunities for planners to learn from one another. Linking each objective to a measurable outcome makes it easier to demonstrate value to hospital executives later, particularly in cost-pressured environments such as NSW Health or Queensland Health.

It also helps to align the scope with national guidance. eviQ protocols and the Royal Australian and New Zealand College of Radiologists position statements describe expected practice for many tumour streams, and ARPANSA's safety guides set the regulatory floor. A peer-review program that references these documents by name will feel familiar to auditors and easier for new staff to grasp.

A short scoping document, signed off by the head of department, prevents mission creep and gives planners something to point at when questions arise about why a case did or did not get reviewed.

Choosing a model that fits the service

There is no single template that suits every Australian centre. A small regional department in Warrnambool or Launceston may not have a second qualified planner on site, so a synchronous review meeting is impossible. A large metropolitan network in Melbourne or Sydney can usually gather a room full of reviewers within an hour.

Three models tend to work in practice. The first is a daily morning huddle where every new plan is tabled briefly before treatment starts. The second is a scheduled weekly meeting that focuses on complex cases, often run as a multidisciplinary session with radiation oncologists present. The third is an asynchronous review where a plan is shared electronically, reviewed within a defined timeframe, and signed off through the treatment management system.

Hybrid models are increasingly common. A site might hold a brief daily huddle for simple cases and reserve the longer weekly meeting for head and neck or paediatrics. The choice should reflect the case mix, the number of planners on the rota, and the availability of senior staff.

Building the multidisciplinary team

Peer review is not just a physics activity. Radiation oncologists, radiation therapists, dosimetrists, and nursing staff each see different aspects of a plan, and the most effective programs bring them together. A radiation oncologist might spot a clinical target volume that drifts from departmental guidelines. A senior therapist might notice a beam arrangement that will be hard to deliver safely on the matched linac. A physicist might flag a dose calculation that exceeds the algorithm's known limits. In tight-knit Australian departments where staff have worked alongside each other for years, the review meeting can also double as a regular catch-up, which makes it easier to raise tricky cases without anyone feeling they are making a fuss.

A practical mix for a weekly meeting includes at least two radiation oncologists, a senior physicist, and a lead radiation therapist, with administration support to take minutes and track action items. Where staffing is thin, networks such as the Trans Tasman Radiation Oncology Group can connect planners across sites for joint sessions, and ACPSEM's special interest groups sometimes host cross-centre case discussions that double as informal peer review.

Roles within the review need to be agreed in advance. One common approach is to assign a primary reviewer for each case who is responsible for reading the plan in depth and leading the discussion, with secondary reviewers providing a safety check.

Key roles in a peer-review meeting

• A chair who runs the session, keeps time, and ensures every plan is discussed.
• A primary reviewer who has read the plan beforehand and prepares two or three specific questions.
• A scribe who captures decisions, dose changes, and follow-up actions in a shared log.
• A radiation oncologist who can confirm clinical intent and approve replans if needed.
• A senior planner who signs off on any changes before the plan returns to the workflow.

Integrating peer review into the clinical workflow

A peer-review program only works if it survives contact with a busy clinic. The best approach is to treat the review as a milestone in the planning pathway, sitting between plan approval and the pretreatment quality assurance check. Plans should not be released for treatment until the review record is complete, except in genuine emergencies where a senior clinician takes responsibility.

Timing matters. Reviews that happen two hours before the first fraction are often rushed and miss subtle issues. A target of 24 to 48 hours before treatment gives reviewers enough time to look at the plan properly and discuss it with colleagues. In centres with evening planning lists, this can mean a brief handover note from the late-shift planner to the morning reviewer.

Technology helps. Most Australian centres use Mosaiq or Elekta record-and-verify systems, and many now overlay peer-review checklists directly into the planning software. A simple shared spreadsheet still works for smaller sites. The important thing is that the review state of every plan is visible to the treating team at a glance.

Capacity planning is often overlooked. If a centre treats thirty-five patients a day and reviews each plan for fifteen minutes, that is nearly nine hours of reviewer time. Building this into job descriptions and rosters, rather than expecting it to happen in spare moments, is what separates sustainable programs from those that fade after a year.

Documentation, feedback, and the quality loop

Documentation turns a conversation into evidence. Each review should produce a short structured note that lists the plan identifier, the reviewers present, the key findings, and any agreed actions. These notes feed directly into the centre's quality management system and can be audited later by ARPANSA, state regulators, or accreditation assessors.

Feedback is the part most often forgotten. A junior planner who has their plan questioned in front of a senior oncologist needs constructive, specific guidance, not a vague "tighten this up". Programs that work well build in five-minute coaching moments at the end of each meeting, or pair junior planners with a mentor for follow-up on action items. The culture of the meeting sets the tone, and a chair who frames every comment as a learning opportunity quickly wins trust.

Aggregated findings over six or twelve months become a powerful improvement tool. If head and neck plans consistently trigger the same feedback about parotid constraints, that points to a real gap in baseline planning guidelines. If replans cluster around a particular planner, it suggests the need for additional training. Data-driven feedback loops turn peer review from a safety check into an engine for continual improvement.

Review findings worth tracking over time

• Number of plans reviewed against total plans treated, broken down by tumour stream.
• Common causes of replan requests, such as target coverage, organ-at-risk constraints, or contour edits.
• Average time from plan completion to peer-review sign-off.
• Number of plans with documented changes versus plans approved without modification.
• Recurring feedback themes grouped by planner experience level.

Sustaining the program over time

The first six months of a peer-review program are usually energetic. The harder challenge is keeping that energy alive in year three and beyond, when the novelty has worn off and the same planners are reviewing each other's work week after week. Refreshers, rotating chair responsibilities, and periodic external audits all help.

Cross-centre benchmarking offers another lever. Private networks and state-wide services have begun publishing aggregated peer-review metrics, which gives individual sites a sense of whether their program is keeping pace. A planner who can see that their head and neck replan rate is twice the network average has a clear reason to look for improvement.

Planners who want to compare notes with colleagues outside their own network often find that attending a national or international scientific meeting is the fastest way to refresh their thinking. Delegates preparing for the upcoming meeting in Banff can review the conference accommodations page well in advance, coordinate travel with peers from other Australian centres, and arrive ready to swap practical tips rather than scrambling for last-minute logistics.

The program itself should evolve with the technology. As more Australian centres bring in surface-guided radiotherapy, MR-linacs, and adaptive planning tools, the questions asked in peer review will change. A review process designed for static IMRT plans will need to be rebuilt for online adaptive workflows. Treating the program as a living document, reviewed annually, keeps it relevant to the work the team is actually doing.

For departments ready to take the next step, the resources archived from the 2014 Annual Scientific Meeting in Banff remain a useful reference point. The meeting's roommate matching program showed how planners from different centres can build professional networks before the sessions even begin, and the same principle applies today when setting up peer-review connections between regional and metropolitan sites.

Planners building a new program from scratch are encouraged to download the archived abstracts, study how other centres structured their review meetings, and reach out to presenters whose work overlaps with their own service. Bringing two or three plans to talk through in person, or simply listening to how other programmes run their reviews, often sparks the kind of practical ideas that are hard to generate from a desk alone.