Results 71 to 80 of about 904 (171)

Comparative evaluation of image‐guided radiation therapy (IGRT)‐based dose calculation accuracy using cone‐beam, megavoltage, and kilovoltage CT modalities

Journal of Applied Clinical Medical Physics, Volume 26, Issue 12, December 2025.
Abstract Purpose This study evaluates the dosimetric accuracy of three image‐guided radiotherapy (IGRT) imaging modalities, cone‐beam computed tomography (CBCT), megavoltage computed tomography (MVCT), and image‐guided kilovoltage computed tomography (IG‐kVCT), using modality‐specific HU‐to‐density (HU‐D) calibrations.
Sirawit Saobai, Anirut Watcharawipha, Somsak Wanwilairat, Warit Thongsuk, Wannapha Nobnop   +4 more
wiley   +1 more source

Linking users' subjective QoE evaluation to signal strength in an IEEE 802.11b/g wireless LAN environment [PDF]

, 2010
Although the literature on Quality of Experience (QoE) has boomed over the last few years, only a limited number of studies have focused on the relation between objective technical parameters and subjective user-centric indicators of QoE.
De Marez, Lieven, De Moor, Katrien, Deryckere, Tom, Joseph, Wout, Ketyko, Istvan, Martens, Luc, Tanghe, Emmeric   +6 more
core   +3 more sources

Assessing the sensitivity and suitability of a range of detectors for SIMT PSQA

Journal of Applied Clinical Medical Physics
AbstractPurposeSingle‐isocenter multi‐target intracranial stereotactic radiotherapy (SIMT) is an effective treatment for brain metastases with complex treatment plans and delivery optimization necessitating rigorous quality assurance. This work aims to assess five methods for quality assurance of SIMT treatment plans in terms of their suitability and ...
Dunn, Leon, Tamborriello, Alessia, Subramanian, Brindha, Xu, Xiaolei, Ruruku, Tyrone Te   +4 more
openaire   +2 more sources

Comparison of log file‐based and measurement‐based QA for detecting MLC positional errors and evaluating dosimetric impacts of MLC defects

Journal of Applied Clinical Medical Physics, Volume 26, Issue 12, December 2025.
Abstract Purpose This study aimed to compare the sensitivity of log file‐based quality assurance (LF‐QA) and measurement‐based quality assurance (MB‐QA) for detecting multileaf collimator (MLC) positional errors and to evaluate the dosimetric impacts of MLC mechanical drive train defects.
Chul Hang Kim, Ki Mun Kang, Hoon Sik Choi   +2 more
wiley   +1 more source

Quantification of the aperture modulation in radiotherapy treatment plans

Medical Physics, Volume 52, Issue 12, December 2025.
Abstract Background Many international guidelines, including those from the American Association of Physicists in Medicine (AAPM), emphasize the importance of quantifying plan modulation and recommend clearly documenting the modulation amount and range of radiotherapy treatment plans. However, there is no standardization or consensus on how to quantify
Victor Hernandez, Iñigo Lara‐Aristimuño, Ruben Abella, Jordi Saez   +3 more
wiley   +1 more source

Validation of a patient‐specific quality assurance tool for offline analysis of treatment deliveries

Medical Physics, Volume 52, Issue 12, December 2025.
Abstract Background In radiation therapy, Patient‐Specific Quality Assurance (PSQA) is used to ensure safety and accuracy of treatment deliveries, which is paramount to control the disease while safeguarding healthy tissues. In common clinical practice, this involves comparing the planned dose to a dose measured in a phantom prior to the treatment ...
Marie Nasrallah, Michele Zeverino, Edward Chao, Dylan Casey, Fernanda Herrera, François Bochud, Raphaël Moeckli   +6 more
wiley   +1 more source

Effective spot size parameters for Acuros dose calculation algorithm using enhanced leaf modelling: Estimation based on small rectangular MLC fields

Journal of Applied Clinical Medical Physics, Volume 26, Issue 11, November 2025.
Abstract Background and Purpose Small field dosimetry plays a critical role in stereotactic radiotherapy, particularly for elongated fields shaped by multileaf collimators (MLCs). This study aims to optimize the Effective Spot Size (ESS) parameters in the Acuros dose calculation algorithm (Eclipse v18.0, with the enhanced leaf modelling ELM for MLC ...
Antonella Fogliata, Antonella Stravato, Marco Pelizzoli, Francesco La Fauci, Pasqualina Gallo, Andrea Bresolin, Luca Cozzi, Giacomo Reggiori   +7 more
wiley   +1 more source

A Survey on QoE-oriented Wireless Resources Scheduling

, 2020
Future wireless systems are expected to provide a wide range of services to more and more users. Advanced scheduling strategies thus arise not only to perform efficient radio resource management, but also to provide fairness among the users. On the other
Queluz, Maria Paula, Rodrigues, António, Sousa, Ivo   +2 more
core   +1 more source

Impact of log file source and data frequency on accuracy of log file-based patient specific quality assurance

Zeitschrift für Medizinische Physik
Performing phantom measurements for patient-specific quality assurance (PSQA) adds a significant amount of time to the adaptive radiotherapy procedure. Log file based PSQA can be used to increase the efficiency of this process.
Akbar Azzi, Gerd Heilemann, Dietmar Georg, Supriyanto Ardjo Pawiro, Terry Mart, Wolfgang Lechner   +5 more
doaj   +1 more source

A practical method to optimize quality assurance results of arc therapy plans in beam modeling

Journal of Medical Physics, 2018
Dosimetric accuracy of a volumetric modulated arc therapy (VMAT) plan is directly related to the beam model, particularly with multileaf collimator characterization.
Jinyu Xue, Hesheng Wang, David Barbee, Matthew Schmidt, Indra J Das   +4 more
doaj   +1 more source