ProSoma Core – MC plan, check, and logfile analysis

Rapid single-step - simulate and calc

For all static beam techniques, such as palliative, POPs and breast planning, ProSoma Core performs a primary calculation of MUs and dose in 3D and can dramatically reduce overall time taken as clinicians can simulate and then instantly approve and sign off plans / calcs resulting in an efficient, single step process from simulation - calc – approval – sign off. Add no more than 1 minute to your existing simulation procedure.

Secondary plan and MU check

Interactive: MC engine vs TPS

Complex plans such as IMRT, VMAT, stereotactic, can be calculated on 3D anatomy by the Monte Carlo dose engine providing the highest-level accuracy secondary plan and MU check. Interactively check plan results in 3D patient anatomy. As a Monte Carlo model, it provides definitive answers to non-measurable difficult areas such as head and neck and chest regions that are superior to older TPS algorithms such as collapsed cone.

Verification of daily dose delivery

Not only is ProSoma Core a plan check system, but it also calculates the actual dose delivered by the treatment machine on any day, showing the effect of the delivery on the patient’s treatment. It provides extensive analyses and a verification report of dose differences and errors.

ProSoma can automate adaptive dose re-calculation using daily cone beam CT data (CBCT) brought together with the planning CT and RT data to perform deformable image registration of the two CTs and transfer the RT Structure Set and RT Plan onto the deformed planning CT. It will then calculate the new dose distribution on that CT. DVHs and various dose parameters will be calculated automatically taking into account the current patient anatomy. As a result of those calculations, a pdf report will be generated and be available for review in ProSoma or via the ProSoma Web Portal.

All calculations are performed and reviewed in 3D, and notifications of results can be sent via e-mail for efficient task management.

Log file evaluation

The machine log file analysis provides QA of another source of potential error in radiotherapy: It checks if actual machine parameters during treatment delivery match planned machine parameters in the RT Plan. For this purpose, ProSoma Core can read machine log files from Varian and Elekta linacs which contain physical machine parameters recorded during treatment and then compares the resulting fluence images or 3D dose distributions to the fluences or doses resulting from the RT Plan. Parameters found in machine log files include dose rate, gantry and collimator angle, jaw and MLC positions. The idea behind ProSoma Core’s machine log file analysis is to detect if new log files have been written by the treatment machine and then automatically trigger recalculations using those files and the respective CT and RT data.

The 3D dose computed from log file data may now be compared either to the TPS dose or to the ProSoma Core computed MC reference dose on the planning CT. In this way, it is possible to isolate the differences resulting from log file deviations and ignore differences resulting from different calculation algorithms.