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Titolo:
An analysis of anatomic landmark mobility and setup deviations in radiotherapy for lung cancer
Autore:
Samson, MJ; de Koste, JRV; de Boer, HCJ; Tankink, H; Verstraate, M; Essers, M; Visser, AG; Senan, S;
Indirizzi:
Univam,tterdam Hosp, Dr Daniel Denhoed Canc Ctr, Dept Radiat Oncol, Rotterd Univ Rotterdam Hosp Rotterdam Netherlands r, Dept Radiat Oncol, Rotterd Univ Rotterdam Hosp, Dr Daniel Denhoed Canc Ctr, Dept Clin Phys, Rotterdam, Univ Rotterdam Hosp Rotterdam Netherlands r, Dept Clin Phys, Rotterdam,
Titolo Testata:
INTERNATIONAL JOURNAL OF RADIATION ONCOLOGY BIOLOGY PHYSICS
fascicolo: 4, volume: 43, anno: 1999,
pagine: 827 - 832
SICI:
0360-3016(19990301)43:4<827:AAOALM>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
RADIATION-THERAPY; PORTAL IMAGES; ACCURACY; IRRADIATION; FIELDS; FILMS;
Keywords:
portal imaging; anatomic landmark mobility; treatment verification; radiotherapy;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
17
Recensione:
Indirizzi per estratti:
Indirizzo: Samson, MJ St Elisabeth Hosp, Dept Radiat Oncol, Breedestr O, Curacao, Netherlands St Elisabeth Hosp Breedestr O Curacao Netherlands Netherlands
Citazione:
M.J. Samson et al., "An analysis of anatomic landmark mobility and setup deviations in radiotherapy for lung cancer", INT J RAD O, 43(4), 1999, pp. 827-832

Abstract

Purpose: To identify thoracic structures that exhibit little internal motion during irradiation and to determine setup variations in patients with lung cancer. Methods and Materials: Intrafractional images were generated with an electronic portal-imaging device from the AP fields of 10 patients, during several fractions. To determine the intrafractional mobility of thoracic structures, visible structures were contoured in every image and matched with a reference image by means of a crosscorrelation algorithm. Setup variations were determined by comparing portal images with the digitized simulator filmsusing the stable structures as landmarks. Results: Mobility was limited in the lateral direction for the trachea, thoracic wall, paraspinal line, and aortic notch, and in the craniocaudal direction for the clavicle, aortic notch, and thoracic wall. Analysis of patient setup revealed random deviations of 2.0 mm (1 SD) in the lateral direction and 2.8 mm in the craniocaudal direction, while the systematic deviations were 2.5 and 2.0 mm (1 SD) respectively. Conclusions: We have identified thoracic structures that exhibit little internal motion in the frontal plane, and recommend that these structures be used for verifying patient setup during radiotherapy. The daily variation in the setup of lung cancer patients at our center appears to be acceptable. (C) 1999 Elsevier Science Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 11/07/20 alle ore 07:28:42