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An improved calibration procedure for accurate plastic scintillation dosimetry on an MR-linac.
Phys Med Biol
December 2024
Department of Radiotherapy, University Medical Centre Utrecht, Utrecht, The Netherlands.
Plastic scintillation dosimeters (PSDs) are highly suitable for real-time dosimetry on the MR-linac. For optimal performance, the primary signal (scintillation) needs to be separated from secondary optical effects (Cerenkov, fluorescence and optical fiber attenuation). This requires a spectral separation approach and careful calibration.
View Article and Find Full Text PDFPerformance evaluation of an inorganic optical fibre dosimeter for use in external beam radiotherapy with pulsed beams.
Phys Med Biol
October 2024
Patrick G. Johnston Centre for Cancer Research, Queen's University Belfast, Belfast BT9 7AE, United Kingdom.
. Optical fibre dosimeters (OFDs) offer great promise for real-timedose measurement in radiation-based treatment modalities such as radiotherapy and brachytherapy. This is attributed to their many useful qualities such as high spatial resolution and sensitivity.
View Article and Find Full Text PDFCherenkov imaging combined with scintillation dosimetry provides real-time positional and dose monitoring for radiotherapy patients with cardiac implanted electronic devices.
Phys Imaging Radiat Oncol
October 2024
Radiation Oncology, Dartmouth Cancer Center, Dartmouth-Health, Lebanon, NH 03765, United States.
Background And Purpose: Cardiac implanted electronic devices (CIED) require dose monitoring during each fraction of radiotherapy, which can be time consuming and may have delayed read-out times. This study explores the potential of Cherenkov imaging combined with scintillation dosimetry as an alternative verification system.
Methods And Materials: Time-gated, complementary metal-oxide-semiconductor (iCMOS) cameras were used to collect video images of anthropomorphic phantoms and patients undergoing radiation treatment near chest wall cardiac devices.
Impact of kV-cone beam computed tomography dose on DNA repair mechanisms: A pilot study.
Cancer Radiother
October 2024
Neolys Diagnostics, 7, allée de l'Europe, 67960 Entzheim, France; ALARA group, 7, allée de l'Europe, 67960 Entzheim, France. Electronic address:
Purpose: In head and neck squamous cell carcinoma (HNSCC), early complications of the radiotherapy (RT) are observed from the beginning of the treatment to a few months after its end. During external radiotherapy treatment, several patient-dependent parameters can cause a modification of the dose distribution compared to the planned distribution due to variation in patient positioning, anatomy, or intra-fractional movements for example. To verify these parameters during treatment sessions, one of the most commonly used solutions is the cone-beam computed tomography (CBCT).
View Article and Find Full Text PDFVisual Dose Monitoring for Whole Breast Radiation Therapy Treatments via Combined Cherenkov Imaging and Scintillation Dosimetry.
Int J Radiat Oncol Biol Phys
September 2024
Geisel School of Medicine, Dartmouth College, Hanover, New Hampshire; The Department of Radiation Oncology and Applied Sciences, Dartmouth Cancer Center, Dartmouth Health, Lebanon, New Hampshire.
Article Synopsis
- The study explores a new method for monitoring radiation doses during whole breast radiation therapy (WBRT) using scintillation dosimetry and Cherenkov imaging to improve accuracy and reduce secondary cancer risk.
- Ten patients were monitored with small scintillator dosimeters compared to traditional optically stimulated luminescent dosimeters (OSLDs), showing a high accuracy in dose measurement with only a 2.8% discrepancy on average.
- The findings suggest that this integrated approach allows for quicker and more effective verification of radiation doses in real-time, improving patient safety by ensuring precise dose delivery.
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