title: Quality control in the conservative treatment of breast cancer: patient dosimetry using silicon detectors.
abstract: Twenty patients with early breast cancer were treated with external irradiation, delivered with two tangential beams (6 MV X-rays) using a half-beam block (HBB) and 3-D compensating filters. All patients were immobilized with individualized cellulose acetate casts. Patient dosimetry was performed using p-type silicon detectors. Midline doses were calculated by combined entrance and exit dose measurements. The mean ratio of the measured and the prescribed doses was 96.6 +/- 3.8% at the reference point, 96.8 +/- 4.3% at off-axis points on the central plane and 96.8 +/- 7.6% at off-plane points.
authors.affiliation: Department of Radiation Oncology, Clinica S. Pio X, Milan, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Ciocca
authors.forename: L
authors.initials: L
authors.lastname: Landoni
authors.forename: C
authors.initials: C
authors.lastname: Italia
authors.forename: P
authors.initials: P
authors.lastname: Montanaro
authors.forename: P
authors.initials: P
authors.lastname: Canesi
authors.forename: R
authors.initials: R
authors.lastname: Valdagni
mesh_terms: D001943:Breast Neoplasms / Q000532:radiotherapy*; D002138:Calibration; D004307:Dose-Response Relationship, Radiation; D005260:Female; D006801:Humans; D007103:Immobilization; D011785:Quality Assurance, Health Care; D011879:Radiotherapy Dosage; D011881:Radiotherapy, Computer-Assisted; D011882:Radiotherapy, High-Energy; D012825:Silicon
chemical_list: D012825:Silicon