Back to Search
Start Over
Radiochromic film dosimetry in synchrotron radiation breast computed tomography: a phantom study
- Source :
- J Synchrotron Radiat
- Publication Year :
- 2020
-
Abstract
- This study relates to the INFN project SYRMA-3D for in vivo phase-contrast breast computed tomography using the SYRMEP synchrotron radiation beamline at the ELETTRA facility in Trieste, Italy. This peculiar imaging technique uses a novel dosimetric approach with respect to the standard clinical procedure. In this study, optimization of the acquisition procedure was evaluated in terms of dose delivered to the breast. An offline dose monitoring method was also investigated using radiochromic film dosimetry. Various irradiation geometries have been investigated for scanning the prone patient's pendant breast, simulated by a 14 cm-diameter polymethylmethacrylate cylindrical phantom containing pieces of calibrated radiochromic film type XR-QA2. Films were inserted mid-plane in the phantom, as well as wrapped around its external surface, and irradiated at 38 keV, with an air kerma value that would produce an estimated mean glandular dose of 5 mGy for a 14 cm-diameter 50% glandular breast. Axial scans were performed over a full rotation or over 180°. The results point out that a scheme adopting a stepped rotation irradiation represents the best geometry to optimize the dose distribution to the breast. The feasibility of using a piece of calibrated radiochromic film wrapped around a suitable holder around the breast to monitor the scan dose offline is demonstrated.
- Subjects :
- Nuclear and High Energy Physics
Film Dosimetry
Materials science
Synchrotron radiation
Socio-culturale
Breast Neoplasms
Computed tomography
Radiation Dosage
Rotation
Radiochromic dosimetry
Imaging phantom
030218 nuclear medicine & medical imaging
03 medical and health sciences
Kerma
0302 clinical medicine
medicine
Humans
Dosimetry
Irradiation
Instrumentation
Radiation
medicine.diagnostic_test
Phantoms, Imaging
synchrotron radiation
breast computed tomography
radiochromic dosimetry
Research Papers
Breast computed tomography
Italy
Beamline
030220 oncology & carcinogenesis
Female
Tomography, X-Ray Computed
Breast computed tomography, Radiochromic dosimetry, Synchrotron radiation
Synchrotrons
Biomedical engineering
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- J Synchrotron Radiat
- Accession number :
- edsair.doi.dedup.....b785c17a73c9ba90e42a8e24b223768d