Immobilization improves the reproducibility of patient positioning during six-field conformal radiation therapy for prostate carcinoma

A quality control study of the accuracy of patient positioning in irradiation of pelvic fields

“…Differ ent treatment techniques (six-field, four-field, and threefield) have been used; often a single measurement has been performed in each direction, and results have been presented in very different ways. Taking the percentage of SIM-MV differences ^ 1 cm as a measure of setup accuracy, then alpha cradle casts seem to be increasing precision (98% vs. 85% in Rosenthal et a V s study (25) and 100% vs. some 96% in the analysis of Soffen et al (26)). In our study, 10% of urological cancer patients showed errors 1 cm, which was reduced to a minimum of 1% using the verification and correction procedure on a routine basis.…”

Reproducibility of Patient Positioning for Fractionated Extracranial Stereotactic Radiotherapy Using a Double-Vacuum Technique

“…It is obvious, that not only patient throughput but also minimal patient discomfort need to be kept in mind, especially when considering lengthy treatment times. Many positioning and fixation aids, mostly based on body masks [1,[11][12][13][14] and/or vacuum [6,10,21,22] or foam [5,16,18,19] mattresses are currently available and in use. Some of these are integrated in a stereotactic frame to decrease uncertainties imposed by skin shift [6,[9][10][11]21].…”

Comparison of the effectiveness of different immobilization systems in different body regions using daily megavoltage CT in helical tomotherapy

“…The success of radiotherapy depends mostly on the accuracy and the reproducibility of daily treatment delivery. 1,2 Many studies have shown that an effective immobilization system can reduce positioning variations [3][4][5][6] and improve the outcome of radiotherapy treatment. With the introduction of many commercially available immobilization accessories, oncology departments have developed their own immobilization systems for specific cancer patients and radiotherapy techniques based on their available resources and treatment protocols.…”