ESTRO 2022 - Abstract Book

S1632

Abstract book

ESTRO 2022

Six HNC survivors who attended one year of control after finished RT have been enrolled. All participants are male, 51-66 years old. The study is designed as a qualitative research study within the hermeneutical tradition in humanity. The Norwegian psychologist Siri Næss’ definition of quality of life is the theoretical framework, which forms the basis of the interview guide. Six semi-structured individual interviews have been conducted, audio-recorded and transcribed. The material is coded to include statements about HNC survivals experience of the amount and timing of given information. Results The interviews have reviled that male HNC survivals are generally overwhelmed by amount of written and oral information giving by the many different health professionals including radiographers, but also about their ability to absorb the information at given time. Five out of six informants express that they have got an incomprehensible amount of information at the beginning of the treatment and because of the psychological crisis that they have been in at that moment, they did not read the leaflets provided in advance and could not remember all the information given. The citations are predominantly negative as the HNC survivals are dissatisfied with the overall distribution of information. According to Næss, this means the quality of life is low to the extent that the person’s consciously cognitive experiences are negative. Only few positive feelings and assessments are recorded that predominantly affect the relatives' commitment to organize written information and remember appointments.

Conclusion Patients have a desire to receive information in person, drop by drop, when relevant, and do not read the material in advance. Based on this, Radiographers and other healthcare professionals cannot take for granted that patients are well- informed. The amount and flow of information have a major impact on patients' overall understanding of their course of treatment, and one year after completion of treatment, it still affects their quality of life. The course of treatment has been completed, but the patients' coherent narrative has not.

PO-1838 The Comparison between DIBH and Abdominal Compression Treatment Technique in Liver SBRT

Y. Zhang 1 , B. Deng 1

1 Cancer Hospital Chinese Academy of Medical Science,Shenzhen Center, Radiation Oncology, Shen Zhen, China

Purpose or Objective There are two available motion management treatment techniques in our institute for liver SBRT radiotherapy treatment. We would like to compare the differences between these two techniques in clinical use. Materials and Methods A total of 20 patients were included in this study retrospectively. 7 patients were treated using SG-DIBH technique (Vision RT, UK) and 13 patients were treated using abdominal compression (AC) technique (Qfix, US). SG-DIBH patients were positioned using AlignRT. AlignRT dual-surface technique was applied for patient’s breath hold position. CBCT were taken under DIBH status. On the other hand, AC patients used the skin markings for positioning and the indexed compression bridge and plate to reduce the diaphragm motion to restrict the breathing magnitude. CBCT was taken before each treatment fraction as well. All CBCT data were recorded. t-test was used for data analysis. It was considered statistically significant if p<0.05. Results The average and standard deviations of setup errors were (0.24±0.21)cm, (0.53±0.45)cm, (0.16±0.15)cm, (0.63±0.73)°, (0.87±1.07)°, (0.77±0.92)° and (0.30±0.21)cm (0.45±0.44)cm, (0.25±0.18)cm, (0.39±0.55)°, (0.41±0.43)°, (0.56±0.42)° in vertical, longitudinal, lateral, rotation, pitch and roll directions for SG-DIBH and AC groups respectively. Both techniques presented similar results. However, SG-DIBH is superior in lateral direction while AC treatment technique is better in pitch direction. Conclusion Both techniques are good to be used for liver tumor SBRT patient motion management. There are much lesser artifacts in SG-DIBH CBCT images which producing a better image quality. Diaphragm and liver contours can be seen clearer for precise matching.

PO-1839 Evaluate the Efficacy of Breathing Coaching in Left Breast Surface Guided DIBH Patients

Y. Zhang 1 , S. Ye 1