Results 1 to 10 of about 25,468 (231)

Development of a new VMAT QA framework for Mobius3D using control-point specific EPID images [PDF]

Frontiers in Oncology
PurposeThis study presents novel quality assurance (QA) approach for volumetric modulated arc therapy (VMAT) that leverages frame-by-frame electronic portal imaging device (EPID) images integrated into Mobius3D for accurate three-dimensional dose ...
JaeHyun Seok, JaeHyun Seok, JaeHyun Seok, Hojin Kim, Min Cheol Han, Jihun Kim, Kwangwoo Park, Hyeonjeong Cho, Hyeonjeong Cho, Hyeonjeong Cho, Dohyeon Yoo, Jin Sung Kim, Jin Sung Kim, Jin Sung Kim   +13 more
doaj   +3 more sources

Perbandingan Verifikasi Akurasi Posisi Pasien Radioterapi Secara Manual dan Semiotomatis Berbasis Citra DRR/EPID [PDF]

Indonesian Journal of Cancer, 2016
Radiotherapy is one of common treatment modality for Nasopharyngeal Cancer. The development of intensity modulated radiotherapy (IMRT technique) gives satisfactory results in the nasopharyngeal cancer treatment, both clinically and dosimetry.
SUSI NOFRIDIANITA
doaj   +2 more sources

Clinical Experience of Intensity Modulated Radiotherapy Pre-Treatment Quality Assurance for Carcinoma Head and Neck Patients with EPID and IMatriXX in Rural Center [PDF]

Journal of Biomedical Physics and Engineering, 2020
Background: Radiation therapy techniques as Intensity Modulated Radiotherapy (IMRT), rapid arc have been used for treatment of cancer with high accuracy.
M More, V Jain, O P Gurjar
doaj   +2 more sources

Evaluation of Daily CT for EPID-Based Transit In Vivo Dosimetry

Frontiers in Oncology, 2021
PurposeThe difference in anatomical structure and positioning between planning and treatment may lead to bias in electronic portal image device (EPID)-based in vivo dosimetry calculations. The purpose of this study was to use daily CT instead of planning
Bin Feng, Bin Feng, Bin Feng, Lei Yu, Lei Yu, Lei Yu, Enwei Mo, Enwei Mo, Enwei Mo, Liyuan Chen, Liyuan Chen, Liyuan Chen, Jun Zhao, Jun Zhao, Jun Zhao, Jiazhou Wang, Jiazhou Wang, Jiazhou Wang, Weigang Hu, Weigang Hu, Weigang Hu   +20 more
doaj   +2 more sources

Initial follow-up of mechanical QC tests for RapidArc Dynamic (RAD). [PDF]

J Appl Clin Med Phys
Abstract Background RapidArc Dynamic (RAD) is a new solution for delivery of radiotherapy introduced by Varian. RAD blends Volumetric Modulated Arc Therapy (VMAT) and Intensity‐Modulated Radiation Therapy (IMRT) by pausing gantry rotation at predefined positions and adds a degree of freedom: a dynamic collimator.
Van Riet E, Piot W, Vanstraelen B, Aerts K, Reynders T, Depuydt T, Crijns W.   +6 more
europepmc   +2 more sources

Evaluation of Dose Distribution at the Level of Electronic Portal Imaging Device using Treatment Planning System [PDF]

Journal of Biomedical Physics and Engineering
Background: Treatment Planning Systems (TPS) are designed to calculate dose distributions within the CT imaging field of view. However, the Electronic Portal Imaging Device (EPID) is positioned outside this area, making it challenging to use standard TPS
Amene Bagheri, Mehdi Momennezhad, Shahrokh Nasseri, Azam Eskandari, Erfan Saatchian, Maryam Naji, Mohammad Yasin Mohammadi   +6 more
doaj   +2 more sources

Dose Characteristics of a Deep Learning Model for EPID-based In vivo Dosimetry [PDF]

Journal of Medical Physics
Background: Images from onboard electronic portal imaging devices (EPID) contain dose information that can be converted into dose maps. A cycle-consistent generative adversarial network (CycleGAN)-based model was developed for two-dimensional (2D) EPID ...
Qilin Li, Dingshu Tian, Guangyao Sun, Wendong Gu, Jieqiong Jiang   +4 more
doaj   +2 more sources

CacheQuote: Efficiently Recovering Long-term Secrets of SGX EPID via Cache Attacks

Transactions on Cryptographic Hardware and Embedded Systems, 2018
Intel Software Guard Extensions (SGX) allows users to perform secure computation on platforms that run untrusted software. To validate that the computation is correctly initialized and that it executes on trusted hardware, SGX supports attestation ...
Fergus Dall, Gabrielle De Micheli, Thomas Eisenbarth, Daniel Genkin, Nadia Heninger, Ahmad Moghimi, Yuval Yarom   +6 more
doaj   +2 more sources

The geometric accuracy of off‐axis targets in stereotactic body radiotherapy treatments across three linear accelerators [PDF]

J Appl Clin Med Phys
Abstract Purpose This study quantifies isocenter and off‐axis geometric uncertainties using MultiMet Winston–Lutz (WL) tests to optimize gross tumour volume (GTV)‐to‐PTV (planning target volume) margin for single isocenter multiple target (SIMT) stereotactic body radiotherapy (SBRT) across three linear accelerators.
Chinnaiya D, Mudhana G.
europepmc   +2 more sources

Patient-specific quality assurance for extremely small field sizes using 3D in vivo dosimetry in fractionated stereotactic radiosurgery for brain metastases. [PDF]

J Appl Clin Med Phys
Abstract Background Fractionated stereotactic radiosurgery (fSRS) using LINAC‐based volumetric‐modulated arc therapy (VMAT) has become widely adopted and achieved favorable outcomes. However, this technique involves extremely small field sizes, making pre‐treatment quality assurance (QA) with high‐resolution detectors essential.
Jumonji K, Takatsu J, Hara N, Fan R, Shimomura R, Inoue T, Iijima K, Okonogi N, Murakami N, Shikama N.   +9 more
europepmc   +2 more sources