Results 71 to 80 of about 3,312 (171)

Synthetic CT‐enabled weekly adaptive radiotherapy for nasopharyngeal carcinoma: Optimizing plan adaptation triggers through volumetric–dosimetric monitoring

Journal of Applied Clinical Medical Physics, Volume 27, Issue 7, July 2026.
Abstract Background and purpose Anatomical changes during radiotherapy for nasopharyngeal carcinoma (NPC) frequently compromise target volume coverage while escalating dose delivery to organs at risk (OARs). In adaptive radiotherapy (ART), optimizing workflow efficiency to minimize clinical workload while maximizing patient benefit remains a ...
Zhenmei Cao, Chun Wu, Lixiang Han, Tingting Duan, Fengyu Zhang, Lansheng Zhang, Bin Wang, Weijie Lei, Xinye Ni   +8 more
wiley   +1 more source

In vivo dosimetry in external beam photon radiotherapy: Requirements and future directions for research, development, and clinical practice

Physics and Imaging in Radiation Oncology, 2020
External beam radiotherapy with photon beams is a highly accurate treatment modality, but requires extensive quality assurance programs to confirm that radiation therapy will be or was administered appropriately.
Igor Olaciregui-Ruiz, Sam Beddar, Peter Greer, Nuria Jornet, Boyd McCurdy, Gabriel Paiva-Fonseca, Ben Mijnheer, Frank Verhaegen   +7 more
doaj   +1 more source

Implementation of VMAT‐based lattice spatially fractionated radiation therapy (SFRT) across linac platforms: Practical considerations for QA and motion management

Journal of Applied Clinical Medical Physics, Volume 27, Issue 7, July 2026.
Abstract Background Spatially fractionated radiation therapy (SFRT) offers a method to treat bulky, radioresistant tumors while sparing normal tissues. Modern volumetric modulated arc therapy (VMAT) delivery enables conformal lattice SFRT plans, but practical guidance for implementation across different linear accelerators is limited.
Somayeh Gholami, Prema Rassiah
wiley   +1 more source

Dosimetry with a fluoroscopic electronic portal imaging device [PDF]

Medical Physics, 2000
Techniques for dosimetric verification of radiotherapy treatments using a CCD camera based fluoroscopic electronic portal imaging device (EPID) are described. The dosimetric characteristics of the EPID were investigated and a method was developed to derive portal dose images (PDIs) from measured EPID images.
openaire   +1 more source

Excessive Hepatic Arterial-portal Venous Shunting May Predict Failure of Microparticle Localization in Hepatocellular Carcinomas

World Journal of Nuclear Medicine, 2013
Locoregional treatment of hepatocellular carcinomas using yttrium-90 (Y-90) microspheres is an emerging modality, and involves the administration of such radioactive particles directly into the hepatic arterial vasculature.
Andrew Eik Hock Tan, Yung Hsiang Kao, Wanying Xie   +2 more
doaj   +1 more source

Same‐day Hyaluronic Acid rectal spacer for TRUS‐guided HDR Prostate Brachytherapy: Feasibility and dosimetric outcomes

Journal of Applied Clinical Medical Physics, Volume 27, Issue 7, July 2026.
Abstract Background Rectal spacers are widely used to reduce rectal dose in prostate radiotherapy. However, their use during transrectal ultrasound (TRUS)‐guided high‐dose‐rate (HDR) brachytherapy has been limited by degradation of ultrasound image quality when placed on the day of the procedure, often necessitating CT‐based planning or separate‐day ...
Sook Kien Ng, Damodar Pokhrel, Colin Huang, Francis Adumata Asamoah, Jordan Alexander Holmes, Arpan Prabhu, Omar Ishaq   +6 more
wiley   +1 more source

Design and commissioning of a new synchrotron beamline dedicated to X‐ray footprinting mass spectrometry

Journal of Synchrotron Radiation, Volume 33, Issue 4, Page 1206-1218, July 2026.
A dedicated beamline at the Advanced Light Source synchrotron has been opened and commissioned for X‐ray footprinting mass spectrometry.The structural biology method of X‐ray footprinting mass spectrometry (XFMS) is available at two national synchrotron beamlines in the USA: one at the Advanced Light Source (ALS) on the West Coast and the other at the ...
Sayan Gupta, Brandon Russell, Line G. Kristensen, Jared de Chant, Anthony Lu, Lieselotte Obst-Huebl, Behzad Rad, James Tyler, Simruthi Subramanian, Savannah Kidd, Sathi Paul, Yan Chen, Christopher J. Petzold, Darren N. Kahan, Shawn M. Costello, Kei Nakamura, Jamie L. Inman, Alastair A. MacDowell, Adrian Spucces, Corie Y. Ralston   +19 more
wiley   +1 more source

Assessment of a 2D electronic portal imaging devices-based dosimetry algorithm for pretreatment and in-vivo midplane dose verification

Advanced Biomedical Research, 2016
Background: The use of electronic portal imaging devices (EPIDs) is a method for the dosimetric verification of radiotherapy plans, both pretreatment and in vivo.
Ali Jomehzadeh, Parvaneh Shokrani, Mohammad Mohammadi, Alireza Amouheidari   +3 more
doaj   +1 more source

Portal dosimetry correction method for validation of single isocenter VMAT plans for multiple brain metastases. [PDF]

J Appl Clin Med Phys, 2022
Lalonde RJ, Huq MS.
europepmc   +1 more source

Extending in aqua portal dosimetry with dose inhomogeneity conversion maps for accurate patient dose reconstruction in external beam radiotherapy. [PDF]

Phys Imaging Radiat Oncol, 2022
Olaciregui-Ruiz I, Osinga-Blaettermann JM, Ortega-Marin K, Mijnheer B, Mans A.   +4 more
europepmc   +1 more source