Radiotherapy setup displacements in breast cancer patients: 3D surface imaging experience
| Autor: | Dalila Neves, Ana Cravo Sá, Carina Marques Coelho, Ana Roma, Sérgio Quaresma, Aude Vaandering, Sara Ferreira, T.M. Silva, Emmanuel Bonnarens, Ana Fermento |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Cone beam computed tomography
medicine.medical_treatment Original research article Patient positioning Whole breast radiotherapy 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine Breast cancer medicine Radiology Nuclear Medicine and imaging Female breast cancer 3D surface imaging Radiotherapy business.industry Significant difference medicine.disease Radiation therapy Oncology Treatment delivery AlignRT 030220 oncology & carcinogenesis Nuclear medicine business |
| Zdroj: | Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP |
| Popis: | Aim In this study, we intend to compare two different setup procedures for female breast cancer patients. Background Imaging in radiotherapy provides a precise localization of the tumour, increasing the accuracy of the treatment delivery in breast cancer. Materials and methods Twenty breast cancer patients who underwent whole breast radiotherapy (WBRT) were selected for this study. Patients were divided into two groups of ten. Group one (G1) was positioned by tattoos and then the patient positioning was adjusted with the aid of AlignRT (Vision RT, London, UK). In group two (G2), patients were positioned only by tattoos. For both groups, the first 15 fractions were analyzed, a daily kilovoltage (kV) cone beam computed tomography (CBCT) image was made and then the rotational and translational displacements and, posteriorly, the systematic (Σ) and random (σ) errors were analyzed. Results The comparison of CBCT displacements for the two groups showed a statistically significant difference in the translational left–right (LR) direction (ρ[[ce:hsp sp="0.25"/]]=[[ce:hsp sp="0.25"/]]0.03), considering that the procedure with AlignRT system has smaller lateral displacements. The results of systematic (Σ) and random (σ) errors showed that for translational displacements the group positioned only by tattoos (G2) demonstrated higher values of errors when compared with the group positioned with the aid of AlignRT (G1). Conclusions AlignRT could help the positioning of breast cancer patients; however, it should be used with another imaging method. |
| Databáze: | OpenAIRE |
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