scholarly journals Development of a rotational set‐up correction device for stereotactic head radiation therapy: A performance evaluation

2019 ◽  
Vol 20 (6) ◽  
pp. 206-212
Author(s):  
Keisuke Usui ◽  
Akira Isobe ◽  
Naoya Hara ◽  
Tomoya Muroi ◽  
Osamu Sajiki ◽  
...  
Keyword(s):  
Radiation Therapy ◽  
Performance Evaluation ◽  
Set Up ◽  
A Performance

A performance evaluation and modification of the UNICEF upward-flow water filter

Waterlines ◽  
1993 ◽  
Vol 12 (2) ◽  
pp. 29-31 ◽  
Author(s):  
Vinay Pratap Singh ◽  
Malay Chaudhuri
Keyword(s):  
Performance Evaluation ◽  
Upward Flow ◽  
Water Filter ◽  
A Performance

scholarly journals SRPerf: a Performance Evaluation Framework for IPv6 Segment Routing

2020 ◽  
pp. 1-1
Author(s):  
Ahmed Abdelsalam ◽  
Pier Luigi Ventre ◽  
Carmine Scarpitta ◽  
Andrea Mayer ◽  
Stefano Salsano ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Evaluation Framework ◽  
A Performance

Evaluation of set-up errors and estimation of set-up margin during external beam radiation therapy of prostate cancer using electronic portal imaging device (EPID)

2021 ◽  
pp. 1-8
Author(s):  
Daryoush Khoramian ◽  
Soroush Sistani ◽  
Bagher Farhood
Keyword(s):  
Prostate Cancer ◽  
Radiation Therapy ◽  
Target Volume ◽  
External Beam Radiation ◽  
Beam Radiation ◽  
Cancer Radiotherapy ◽  
Imaging Device ◽  
Portal Images ◽  
Set Up ◽  
Prostate Cancer Radiotherapy

Abstract Aim: In radiation therapy, accurate dose distribution in target volume requires accurate treatment setup. The set-up errors are unwanted and inherent in the treatment process. By achieving these errors, a set-up margin (SM) of clinical target volume (CTV) to planning target volume (PTV) can be determined. In the current study, systematic and random set-up errors that occurred during prostate cancer radiotherapy were measured by an electronic portal imaging device (EPID). The obtained values were used to propose the optimum CTV-to-PTV margin in prostate cancer radiotherapy. Materials and methods: A total of 21 patients with prostate cancer treated with external beam radiation therapy (EBRT) participated in this study. A total of 280 portal images were acquired during 12 months. Gross, population systematic (Σ) and random (σ) errors were obtained based on the portal images in Anterior–Posterior (AP), Medio-Lateral (ML) and Superior–Inferior (SI) directions. The SM of CTV to PTV were then calculated and compared by using the formulas presented by the International Commission on Radiation Units and Measurements (ICRU) 62, Stroom and Heijmen and Van Herk et al. Results: The findings showed that the population systematic errors during prostate cancer radiotherapy in AP, ML and SI directions were 1·40, 1·95 and 1·94 mm, respectively. The population random errors in AP, ML and SI directions were 2·09, 1·85 and 2·29 mm, respectively. The SM of CTV to PTV calculated in accordance with the formula of ICRU 62 in AP, ML and SI directions were 2·51, 2·68 and 3·00 mm, respectively. And according to Stroom and Heijmen, formula were 4·23, 5·19 and 5·48 mm, respectively. And Van Herk et al. formula were 4·96, 6·17 and 6·45 mm, respectively. Findings: The SM of CTV to PTV in all directions, based on the formulas of ICRU 62, Stroom and Heijmen and van Herk et al., were equal to 2·73, 4·98 and 5·86 mm, respectively; these values were obtained by averaging the margins in all directions.

scholarly journals V2V and V2I Communications for Traffic Safety and CO2 Emission Reduction: A Performance Evaluation

2019 ◽  
Vol 151 ◽  
pp. 353-360 ◽  
Author(s):  
Fatma Outay ◽  
Faouzi Kamoun ◽  
Florent Kaisser ◽  
Doaa Alterri ◽  
Ansar Yasar
Keyword(s):  
Performance Evaluation ◽  
Traffic Safety ◽  
Emission Reduction ◽  
Co2 Emission ◽  
Co2 Emission Reduction ◽  
A Performance
Sign in / Sign up

Export Citation Format

Share Document