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Titolo:
Effectiveness of couch height-based patient set-up and an off-line correction protocol in prostate cancer radiotherapy
Autore:
van Lin, ENJT; Nijenhuis, E; Huizenga, H; van der Vight, L; Visser, A;
Indirizzi:
Univ Med Ctr Nijmegen, Joint Ctr Radiat Oncol Arnhem Nijmegen, NL-6500 HB Nijmegen, Netherlands Univ Med Ctr Nijmegen Nijmegen Netherlands NL-6500 HB megen, Netherlands
Titolo Testata:
INTERNATIONAL JOURNAL OF RADIATION ONCOLOGY BIOLOGY PHYSICS
fascicolo: 2, volume: 50, anno: 2001,
pagine: 569 - 577
SICI:
0360-3016(20010601)50:2<569:EOCHPS>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
3-DIMENSIONAL CONFORMAL RADIOTHERAPY; RIGID IMMOBILIZATION; VERIFICATION PROCEDURE; RADIATION-THERAPY; PORTAL IMAGES; IRRADIATION; ACCURACY; REPRODUCIBILITY; LOCALIZATION; PROBABILITY;
Keywords:
set-up techniques; immobilization; off-line set-up correction; electronic portal imaging; prostate radiotherapy;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
30
Recensione:
Indirizzi per estratti:
Indirizzo: van Lin, ENJT Univ Med Ctr Nijmegen, Joint Ctr Radiat Oncol Arnhem Nijmegen, POB 9101, NL-6500 HB Nijmegen, Netherlands Univ Med Ctr Nijmegen POB 9101 Nijmegen Netherlands NL-6500 HB
Citazione:
E.N.J.T. van Lin et al., "Effectiveness of couch height-based patient set-up and an off-line correction protocol in prostate cancer radiotherapy", INT J RAD O, 50(2), 2001, pp. 569-577

Abstract

Purpose: To investigate set-up improvement caused by applying a couch height-based patient set-up method in combination with a technologist-driven off-line correction protocol in nonimmobilized radiotherapy of prostate patients. Methods and Materials: A three-dimensional shrinking action level correction protocol is applied in two consecutive patient cohorts with different set-up methods: the traditional "laser set-up" group (n = 43) and the "couch height set-up" group (n = 112). For all directions, left-right, ventro-dorsal, and cranio-caudal, random and systematic set-up deviations were measured. Results: The couch height set-up method improves the patient positioning compared to the laser set-up method. Without application of the correction protocol, both systematic and random errors reduced to 2.2-2.4 mm (1 SD) and1.7-2.2 mm (1 SD), respectively. By using the correction protocol, systematic errors reduced further to 1.3-1.6 mm (1 SD). One-dimensional deviationswere within 5 mm for >90% of the measured fractions. The required number of corrections per patient in the off-line correction protocol was reduced significantly during the course of treatment from 1.1 to 0.6 by the couch height set-up method, The treatment time was not prolonged by application of the correction protocol. Conclusions: The couch height set-up method improves the set-up significantly, especially in the ventro-dorsal direction. Combination of this set-up method with an off-line correction strategy, executed by technologists, reduces the number of set-up corrections required. (C) 2001 Elsevier Science Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/05/20 alle ore 15:04:09