A review of geometrical errors on portal localization films in 20 patients undergoing breast irradiation after conservative surgery is presented. Patients were immobilized using a cellulose acetate individual cast. Good precision in daily set-up has been noted with a mean ventrodorsal shift of 2.7 mm on medial films and 3.0 mm on lateral films; a mean craniocaudal shift of 1.8 mm on medial films and of 2.0 mm on lateral films have been also observed. The mean half-beam block rotation error has been minimal, ranging 0.8° on medial and 1.1° on lateral films. A new cast was made in 3 20 (15 %) patients depending on variation of breast morphology during treatment and on geometrical errors noted by portal localization film check.

Early breast cancer irradiation after conservative surgery: quality control by portal localization films / R. Valdagni, C. Italia. - In: RADIOTHERAPY AND ONCOLOGY. - ISSN 0167-8140. - 22:4(1991 Dec), pp. 311-313. [10.1016/0167-8140(91)90169-H]

Early breast cancer irradiation after conservative surgery: quality control by portal localization films

R. Valdagni
Primo
;
1991-12

Abstract

A review of geometrical errors on portal localization films in 20 patients undergoing breast irradiation after conservative surgery is presented. Patients were immobilized using a cellulose acetate individual cast. Good precision in daily set-up has been noted with a mean ventrodorsal shift of 2.7 mm on medial films and 3.0 mm on lateral films; a mean craniocaudal shift of 1.8 mm on medial films and of 2.0 mm on lateral films have been also observed. The mean half-beam block rotation error has been minimal, ranging 0.8° on medial and 1.1° on lateral films. A new cast was made in 3 20 (15 %) patients depending on variation of breast morphology during treatment and on geometrical errors noted by portal localization film check.
Early breast cancer; Portal localization film; Quality assurance; Tangential breast irradiation; Breast Neoplasms; Female; Humans; Mastectomy, Segmental; Neoplasm Staging; Postoperative Care; Quality Assurance, Health Care; Radiography
Settore MED/36 - Diagnostica per Immagini e Radioterapia
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/879744
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