Fiducial markers for image-guided partial breast irradiation

Fiducial markers for image-guided partial breast irradiation

Purpose This study was undertaken to study the role of fiducial markers for image-guided partial breast irradiation (IG-PBI), and to compare the shifts based on bony anatomy and fiducial markers. Materials and methods Fifteen patients underwent IGPBI. Three fiducial markers were placed in the tumour...

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Bibliographic Details
Published in:Radiologia medica Vol. 118; no. 7; pp. 1212 - 1219
Main Authors: Trovo, Marco, Polesel, Jerry, Biasutti, Cristina, Sartor, Giovanna, Roncadin, Mario, Trovo, Gaetano Mauro
Format: Journal Article
Language:English
Published: Milan Springer-Verlag 01-10-2013
Subjects:
Aged
Breast Neoplasms - pathology
Breast Neoplasms - radiotherapy
Diagnostic Radiology
Female
Fiducial Markers
Humans
Imaging
Interventional Radiology
Medicine
Medicine & Public Health
Middle Aged
Neoplasm Grading
Neoplasm Staging
Neuroradiology
Radiology
Radioterapia
Radiotherapy
Radiotherapy Dosage
Radiotherapy, Image-Guided - methods
Treatment Outcome
Ultrasound
Image-guided radiation therapy
Partial breast irradiation
Fiducial markers
Radioterapia guidata dalle immagini
Marcatori fiduciali
Irradiazione parziale della mammella
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Summary:Purpose This study was undertaken to study the role of fiducial markers for image-guided partial breast irradiation (IG-PBI), and to compare the shifts based on bony anatomy and fiducial markers. Materials and methods Fifteen patients underwent IGPBI. Three fiducial markers were placed in the tumour bed at the time of surgery. Daily orthogonal anterior/ posterior and lateral kV-images were taken before each fraction and compared with the digitally-reconstructed radiographs, both using bony landmarks and fiducial markers as reference. The Student’s t test was used to detect a meaningful difference of 3 mm in between the two methods. Results A total of 105 image-guided radiation therapy (IGRT) sessions were obtained. The mean superior/inferior, right/left, and anterior/posterior shifts obtained using the bony landmarks vs. the fiducial markers were 2 mm [standard deviation (SD) 10 mm] vs . 0 mm (SD 7 mm), 0 mm (SD 7 mm) vs . 1 mm (SD 4 mm), and 1 mm (SD 7 mm) vs . 0 mm (SD 5 mm), respectively. The mean shift differences in absolute value between the two methods, along the superior/inferior, right/left and anterior/posterior directions were 5 mm ( p =0.001), 3 mm [ p =not significant (ns)], and 3 mm ( p =ns), respectively. Conclusions Fiducial markers for IG-PBI increase set-up accuracy compared to the bony landmarks, in particular along the superior/inferior direction.
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ISSN:0033-8362
1826-6983
DOI:10.1007/s11547-013-0967-2