Publications by authors named "L Masturzo"
Article Synopsis
- The study investigated the noise reduction capabilities of a photon-counting detector (PCD) in computed tomography (CT) using a model-based iterative reconstruction algorithm (QIR).
- Forty repeated scans were conducted on a water phantom and compared with a conventional energy-integrating detector (EID) to assess noise characteristics.
- Results showed that PCD-CT significantly reduced noise levels and improved image uniformity, demonstrating the effectiveness of QIR in decreasing noise without altering the overall distribution of noise values.
Radiomics of cardiac magnetic resonance (MR) imaging has proved to be potentially useful in the study of various myocardial diseases. Therefore, assessing the repeatability degree in radiomic features measurement is of fundamental importance. The aim of this study was to assess test-retest repeatability of myocardial radiomic features extracted from quantitative T1 and T2 maps.
View Article and Find Full Text PDFBackground: The extremely fast delivery of doses with ultra high dose rate (UHDR) beams necessitates the investigation of novel approaches for real-time dosimetry and beam monitoring. This aspect is fundamental in the perspective of the clinical application of FLASH radiotherapy (FLASH-RT), as conventional dosimeters tend to saturate at such extreme dose rates.
Purpose: This study aims to experimentally characterize newly developed silicon carbide (SiC) detectors of various active volumes at UHDRs and systematically assesses their response to establish their suitability for dosimetry in FLASH-RT.
This paper reports the development of dosimeters based on plastic scintillating fibers imaged by a charge-coupled device camera, and their performance evaluation through irradiations with the electron Flash research accelerator located at the Centro Pisano Flash Radiotherapy. The dosimeter prototypes were composed of a piece of plastic scintillating fiber optically coupled to a clear optical fiber which transported the scintillation signal to the readout systems (an imaging system and a photodiode). The following properties were tested: linearity, capability to reconstruct the percentage depth dose curve in solid water and to sample in time the single beam pulse.
View Article and Find Full Text PDFArticle Synopsis
- The free electron fraction in an ionization chamber refers to the percentage of electrons that reach the electrode without attaching to gas molecules, which is key for understanding charge balance during ionization.
- This fraction is influenced by the chamber's geometry, applied voltage, and gas properties, making accurate evaluation crucial for measurements.
- The paper introduces a straightforward method to assess this fraction through simple charge measurements while varying the voltage, demonstrated using an Advanced Markus chamber in a specific high-dose radiation environment.