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2025-10-08
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Este trabajo de fin de máster está dedicado a realizar un proyecto para ampliar un sistema de verificación de tratamientos en radioterapia externa ya implementado. El Plan Check es un sistema que permite verificar diferentes parámetros de una planificación de radioterapia, asegurando que la calidad del tratamiento administrado es la adecuada y detectando los errores que pueden cometerse en las diferentes etapas del proceso. La correcta planificación del tratamiento es de vital importancia, ya que existen parámetros críticos de los cuales depende una óptima entrega de la dosis de radiación prescrita por el médico y la preservación de los tejidos sanos del paciente. A partir de la puesta en marcha de un acelerador Versa HD (Elekta AB) en el Hospital Clínico Universitario Lozano Blesa de Zaragoza en el año 2023, junto con el planificador de tratamientos de radioterapia Monaco integrado con el sistema de registro y verificación de pacientes MOSAIQ, se detectó la necesidad de disponer de un Plan Check, con características similares al que ya existía en este centro para otro planificador y para otro sistema de registro y verificación (Eclipse y ARIA, respectivamente, de la casa comercial Varian). El objetivo principal de este trabajo es ampliar un sistema de verificación de planes de tratamiento en radioterapia. Para ello, se pretende ampliar las funcionalidades del Plan Check actualmente utilizado en el Servicio de Física y Protección Radiológica, comprender en detalle la estructura y el funcionamiento del código existente, y evaluar la eficacia de las verificaciones ya implementadas. Las ampliaciones del Plan Check desarrolladas en este trabajo están implementadas en Python, lenguaje que dispone de un gran número de librerías adicionales para trabajar con los ficheros utilizados en el ámbito de la Física Médica. Tras implementar las nuevas funciones del Plan Check, se procedió a utilizarlas en un conjunto de planificaciones ya diseñadas anteriormente en el Hospital Clínico Universitario Lozano Blesa de Zaragoza. Además, introduciendo errores de forma manual en planes de prueba y con la validación del código, se comprueba que los resultados son satisfactorios. También se compara el tiempo de ejecución del código implementado con el tiempo requerido por el usuario para realizar una revisión de la planificación. Se concluye que las ampliaciones implementadas en el Plan Check permiten detectar y verificar los parámetros analizados, alertando de posibles discrepancias o errores que podrían comprometerla correcta administración del tratamiento. Entre las nuevas funcionalidades destacan: la detección de posibles colisiones, la comprobación de la energía seleccionada para los haces, la verificación del contorneo adecuado de estructuras (como el contorno externo del paciente y los volúmenes de tratamiento), la comprobación de que las estructuras se encuentran dentro del Field Of View y la identificación de la posición de los marcadores de referencia del paciente. Asimismo, se muestra que el tiempo necesario para la revisión automática es considerablemente menor que el requerido en la revisión manual, lo que agiliza el proceso de verificación sin comprometer su calidad.
This master’s thesis is devoted to the development of a project aimed at extending an already implemented verification system for external radiotherapy treatments. The Plan Check is a system that allows the verification of different parameters of a radiotherapy treatment plan, ensuring that the quality of the delivered treatment is adequate and detecting possible errors that may occur at different stages of the process. Proper treatment planning is of vital importance, since there are critical parameters on which both the accurate delivery of the radiation dose prescribed by the physician and the preservation of the patient’s healthy tissues depend. Following the commissioning of a Versa HD linear accelerator (Elekta AB) at the Lozano Blesa University Clinical Hospital in Zaragoza in 2023, together with the Monaco treatment planning system integrated with the MOSAIQ record-and-verify system, the need for a Plan Check with similar characteristics to the one already in use at this center for another planning system and record-and-verify software (Eclipse and ARIA, respectively, from Varian) was identified. The main objective of this work is to extend a treatment plan verification system in radiotherapy. To this end, the aim is to extend the functionalities of the Plan Check currently used in the Department of Medical Physics and Radiation Protection, to gain a detailed understanding of the structure and operation of the existing code, and to assess the effectiveness of the implemented verifications. The extensions of the Plan Check developed in this thesis are implemented in Python, a programming language that offers a wide range of additional libraries for working with files commonly used in the field of Medical Physics. After implementing the new Plan Check functions, they were applied to a set of treatment plans previously designed at the Lozano Blesa University Clinical Hospital in Zaragoza. Moreover, by manually introducing errors into test plans and validating the code, it was confirmed that the results were satisfactory. A comparison was also made between the execution time of the implemented code and the time required by the user to manually review the treatment plan. It is concluded that the extensions implemented in the Plan Check are capable of detecting and verifying the analyzed parameters, alerting to potential discrepancies or errors that could compromise the correct administration of treatment. The extensions developed incorporate the following significant capabilities: detection of possible collisions; verification of the beam energy selection; checking of proper contouring of structures (such as the patient’s external contour and treatment volumes); verification that the structures are included within the Field Of View; and identification of the patient’s reference markers. Furthermore, it is shown that the time required for automatic verification is considerably shorter than that required for manual review, thereby accelerating the verification process while maintaining its quality.
This master’s thesis is devoted to the development of a project aimed at extending an already implemented verification system for external radiotherapy treatments. The Plan Check is a system that allows the verification of different parameters of a radiotherapy treatment plan, ensuring that the quality of the delivered treatment is adequate and detecting possible errors that may occur at different stages of the process. Proper treatment planning is of vital importance, since there are critical parameters on which both the accurate delivery of the radiation dose prescribed by the physician and the preservation of the patient’s healthy tissues depend. Following the commissioning of a Versa HD linear accelerator (Elekta AB) at the Lozano Blesa University Clinical Hospital in Zaragoza in 2023, together with the Monaco treatment planning system integrated with the MOSAIQ record-and-verify system, the need for a Plan Check with similar characteristics to the one already in use at this center for another planning system and record-and-verify software (Eclipse and ARIA, respectively, from Varian) was identified. The main objective of this work is to extend a treatment plan verification system in radiotherapy. To this end, the aim is to extend the functionalities of the Plan Check currently used in the Department of Medical Physics and Radiation Protection, to gain a detailed understanding of the structure and operation of the existing code, and to assess the effectiveness of the implemented verifications. The extensions of the Plan Check developed in this thesis are implemented in Python, a programming language that offers a wide range of additional libraries for working with files commonly used in the field of Medical Physics. After implementing the new Plan Check functions, they were applied to a set of treatment plans previously designed at the Lozano Blesa University Clinical Hospital in Zaragoza. Moreover, by manually introducing errors into test plans and validating the code, it was confirmed that the results were satisfactory. A comparison was also made between the execution time of the implemented code and the time required by the user to manually review the treatment plan. It is concluded that the extensions implemented in the Plan Check are capable of detecting and verifying the analyzed parameters, alerting to potential discrepancies or errors that could compromise the correct administration of treatment. The extensions developed incorporate the following significant capabilities: detection of possible collisions; verification of the beam energy selection; checking of proper contouring of structures (such as the patient’s external contour and treatment volumes); verification that the structures are included within the Field Of View; and identification of the patient’s reference markers. Furthermore, it is shown that the time required for automatic verification is considerably shorter than that required for manual review, thereby accelerating the verification process while maintaining its quality.
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Vera Tena, Daniel. Trabajo de fin de Master: "Implementación de un sistema de verificación de tratamientos de radioterapia para el sistema de planificación Monaco". Universidad Nacional de Educación a Distancia (UNED), (2025)
Centro
Facultad de Ciencias
Departamento
Física Matemática y de Fluídos