TY - JOUR
T1 - Faster and more accurate patient positioning with surface guided radiotherapy for ultra-hypofractionated prostate cancer patients
AU - Mannerberg, Annika
AU - Kügele, Malin
AU - Hamid, Sandra
AU - Edvardsson, Anneli
AU - Petersson, Kristoffer
AU - Gunnlaugsson, Adalsteinn
AU - Bäck, Sven Å.J.
AU - Engelholm, Silke
AU - Ceberg, Sofie
PY - 2021/9/1
Y1 - 2021/9/1
N2 - Introduction: The aim of this study was to evaluate if surface guided radiotherapy (SGRT) can decrease patient positioning time for localized prostate cancer patients compared to the conventional 3-point localization setup method. The patient setup accuracy was also compared between the two setup methods. Materials and methods: A total of 40 localized prostate cancer patients were enrolled in this study, where 20 patients were positioned with surface imaging (SI) and 20 patients were positioned with 3-point localization. The setup time was obtained from the system log files of the linear accelerator and compared between the two methods. The patient setup was verified with daily orthogonal kV images which were matched based on the implanted gold fiducial markers. Resulting setup deviations between planned and online positions were compared between SI and 3-point localization. Results: Median setup time was 2:50 min and 3:28 min for SI and 3-point localization, respectively (p < 0.001). The median vector offset was 4.7 mm (range: 0–10.4 mm) for SI and 5.2 mm for 3-point localization (range: 0.41–17.3 mm) (p = 0.01). Median setup deviation in the individual translations for SI and 3-point localization respectively was: 1.1 mm and 1.9 mm in lateral direction (p = 0.02), 1.8 and 1.6 mm in the longitudinal direction (p = 0.41) and 2.2 mm and 2.6 mm in the vertical direction (p = 0.04). Conclusions: Using SGRT for positioning of prostate cancer patients provided a faster and more accurate patient positioning compared to the conventional 3-point localization setup.
AB - Introduction: The aim of this study was to evaluate if surface guided radiotherapy (SGRT) can decrease patient positioning time for localized prostate cancer patients compared to the conventional 3-point localization setup method. The patient setup accuracy was also compared between the two setup methods. Materials and methods: A total of 40 localized prostate cancer patients were enrolled in this study, where 20 patients were positioned with surface imaging (SI) and 20 patients were positioned with 3-point localization. The setup time was obtained from the system log files of the linear accelerator and compared between the two methods. The patient setup was verified with daily orthogonal kV images which were matched based on the implanted gold fiducial markers. Resulting setup deviations between planned and online positions were compared between SI and 3-point localization. Results: Median setup time was 2:50 min and 3:28 min for SI and 3-point localization, respectively (p < 0.001). The median vector offset was 4.7 mm (range: 0–10.4 mm) for SI and 5.2 mm for 3-point localization (range: 0.41–17.3 mm) (p = 0.01). Median setup deviation in the individual translations for SI and 3-point localization respectively was: 1.1 mm and 1.9 mm in lateral direction (p = 0.02), 1.8 and 1.6 mm in the longitudinal direction (p = 0.41) and 2.2 mm and 2.6 mm in the vertical direction (p = 0.04). Conclusions: Using SGRT for positioning of prostate cancer patients provided a faster and more accurate patient positioning compared to the conventional 3-point localization setup.
KW - Patient positioning
KW - Patient setup time
KW - Radiotherapy workflow
KW - Surface guided radiotherapy
UR - http://www.scopus.com/inward/record.url?scp=85110710736&partnerID=8YFLogxK
U2 - 10.1016/j.tipsro.2021.07.001
DO - 10.1016/j.tipsro.2021.07.001
M3 - Article
C2 - 34527818
AN - SCOPUS:85110710736
VL - 19
SP - 41
EP - 45
JO - Technical Innovations and Patient Support in Radiation Oncology
JF - Technical Innovations and Patient Support in Radiation Oncology
SN - 2405-6324
ER -