AIMS AND BACKGROUND: The aim of this report was to investigate the feasibility in terms of treatment time prolongation of an on-line no-action level correction protocol, based on daily electronic portal image verification. METHODS AND STUDY DESIGN: The occupation of a linear accelerator (LINAC) delivering 3-D conformal treatments was monitored for two weeks (from Monday to Friday, 10 working days). An electronic portal image device I-View (Elekta, UK) was used for setup verification. Single-exposure portal images were acquired daily using the initial 8 monitor units delivered for each treatment field. Translational deviations of isocenter position larger than 5 mm or 7 mm, for radical or palliative treatments, respectively, were immediately corrected. In order to estimate the extra workload involved with the on-line protocol, the time required for isocenter check and table correction was specifically monitored. RESULTS: Forty-eight patients were treated. In all, 482 fractions had electronic portal images taken. Two hundred and forty-five setup corrections were made (50.8% of all fractions). The occupation of the LINAC lasted 106 h on the whole. Twelve h and 25 min (11.7% of LINAC occupation time) were spent for portal image verification and setup correction. On the average, 4.3 fractions per hour were carried out. CONCLUSIONS: When used by trained therapists, ideally, portal imaging may be carried out before each fraction, requiring approximately 10% of LINAC occupation time.
AIMS AND BACKGROUND: The aim of this report was to investigate the feasibility in terms of treatment time prolongation of an on-line no-action level correction protocol, based on daily electronic portal image verification. METHODS AND STUDY DESIGN: The occupation of a linear accelerator (LINAC) delivering 3-D conformal treatments was monitored for two weeks (from Monday to Friday, 10 working days). An electronic portal image device I-View (Elekta, UK) was used for setup verification. Single-exposure portal images were acquired daily using the initial 8 monitor units delivered for each treatment field. Translational deviations of isocenter position larger than 5 mm or 7 mm, for radical or palliative treatments, respectively, were immediately corrected. In order to estimate the extra workload involved with the on-line protocol, the time required for isocenter check and table correction was specifically monitored. RESULTS: Forty-eight patients were treated. In all, 482 fractions had electronic portal images taken. Two hundred and forty-five setup corrections were made (50.8% of all fractions). The occupation of the LINAC lasted 106 h on the whole. Twelve h and 25 min (11.7% of LINAC occupation time) were spent for portal image verification and setup correction. On the average, 4.3 fractions per hour were carried out. CONCLUSIONS: When used by trained therapists, ideally, portal imaging may be carried out before each fraction, requiring approximately 10% of LINAC occupation time.
Authors: Jenny Capuccini; Gabriella Macchia; Eleonora Farina; Milly Buwenge; Domenico Genovesi; Luciana Caravatta; Nam P Nguyen; Silvia Cammelli; Savino Cilla; Tigeneh Wondemagegnhu; A F M Kamal Uddin; Mostafà Aziz Sumon; Francesco Cellini; Vincenzo Valentini; Francesco Deodato; Alessio G Morganti Journal: Clin Exp Metastasis Date: 2018-08-18 Impact factor: 5.150
Authors: Francesco Deodato; Alessio G Morganti; Gabriella Macchia; Savino Cilla; Milly Buwenge; Alice Zamagni; Ilario Ammendolia; Claudio Zamagni; Giovanni P Frezza; Vincenzo Valentini Journal: Breast Cancer (Dove Med Press) Date: 2020-11-12
Authors: Eleonora Farina; Gabriella Macchia; Milly Buwenge; Giambattista Siepe; Alice Zamagni; Silvia Cammelli; Savino Cilla; Tigeneh Wondemagegnhu; Aynalem A Woldemariam; A F M Kamal Uddin; Mostafà Aziz Sumon; Francesco Cellini; Francesco Deodato; Alessio G Morganti Journal: Clin Exp Metastasis Date: 2018-10-08 Impact factor: 5.150