Results 111 to 120 of about 29,680 (229)

VMAT optimization with dynamic collimator rotation

Medical Physics, 2018
PurposeAlthough collimator rotation is an optimization variable that can be exploited for dosimetric advantages, existing Volumetric Modulated Arc Therapy (VMAT) optimization uses a fixed collimator angle in each arc and only rotates the collimator between arcs.
Qihui, Lyu, Daniel, O'Connor, Dan, Ruan, Victoria, Yu, Dan, Nguyen, Ke, Sheng   +5 more
openaire   +3 more sources

Prediction of VMAT gamma passing rates using 3D CNNs based on leaf position analysis and gradient class activation mapping for plan complexity evaluation

Medical Physics, Volume 53, Issue 5, May 2026.
Background Volumetric Modulated Arc Therapy (VMAT) is a highly conformal radiotherapy technique that enables precise tumor irradiation while sparing surrounding healthy tissue. However, the high technical demands this technique places on Linear Accelerators (LinAc) necessitate reliable quality assurance (QA) tools.
Johannes Berchtold, Sara Vockner, Ivan Messner, Markus Stana, Falk Röder, Frank Wolf, Christoph Gaisberger   +6 more
wiley   +1 more source

A Bayesian Causal Model for Matrix‐Valued Exposures With Applications to Radiotherapy Planning

Statistics in Medicine, Volume 45, Issue 10-12, May 2026.
ABSTRACT In radiotherapy for cancer, organs surrounding the target tumor, known as organs‐at‐risk (OARs), should be protected from excessive radiation to avoid toxicity. Radiation exposure to multiple OARs can be summarized using matrix‐valued dose‐volume histograms (DVH), and understanding the causal relationship between DVHs and toxicity outcomes can
Zijin Liu, Zhihui (Amy) Liu, Jennifer Dang, Charles Catton, Himanshu R. Lukka, Peter Chung, Olli Saarela   +6 more
wiley   +1 more source

Solution for Processing Pelvic Bone Metastases with Halcyon TM 2.0 on Lateral and Longitudinal Isocenters Treatment Plans Using the VMAT Technique: A Comparative Study [PDF]

Iranian Journal of Medical Physics
Introduction: Treatment of pelvic bone metastases using a Halcyon machine, mostly presents some difficulties to plan, especially for big volumes because of the machine field size.
Morad Erraoudi, Kaoutar El Bouchiti, Yassine Herrassi, mohamed El ghalmi, Yassir Raoui, Youssef Bouzekraoui, FARIDA BENTAYEB, Lalla Btissam Drissi   +7 more
doaj   +1 more source

Atypical metastatic osteosarcoma pattern in a dog: Lymphatic, neurovascular and subcutaneous metastasis

Veterinary Record Case Reports, Volume 14, Issue 2, May 2026.
Abstract A 6‐year‐old, spayed, female labrador retriever was presented with left distal radial swelling. Imaging, cytology and biopsy identified an aggressive radial lesion with metastasis to the left axillary lymph node, and a diagnosis of presumptive osteosarcoma was made.
Veronica Perez‐Rodriguez, Laura Venner, Rowan Milner, Jishnu Rao Gutti, Elizabeth A. Maxwell   +4 more
wiley   +1 more source

Chromaffin Versus Platelet Granules: What We Have Learned From Chromaffin Cells for Human Studies

Journal of Neurochemistry, Volume 170, Issue 5, May 2026.
Chromaffin cells and platelets both utilize exocytosis to release biogenic amines stored within large dense‐core vesicles—specifically chromaffin granules (epinephrine) and δ‐granules (serotonin). While the chromaffin cell is the foundational model for studying the secretory pathway, platelets offer a highly accessible human cell source for clinical ...
Ricardo Borges
wiley   +1 more source

Dosimetric Evaluation of Tangential Arc and Jaw Tracking Techniques in Volumetric Modulated Arc Therapy for Synchronous Bilateral Breast Cancer

International Journal of Women's Health
Jiyong Zhang,1,* Zewei Chen,1,* Danli Hong2 1Department of Radiation Oncology, Cancer Hospital of Shantou University Medical College, Shantou, Guangdong, 515000, People’s Republic of China; 2Department of Endocrinology, The First ...
Zhang J, Chen Z, Hong D
doaj  

Dosimetric comparison of 3D-conformal radiotherapy, volumetric modulated arc therapy, and h-VMAT in left breast radiotherapy under free-breathing and breath-hold conditions

Scientific Reports
This study investigates the role of the h-VMAT (a hybrid of 3DCRT and VMAT) technique in the Deep Inspirational Breath-Hold (DIBH) method for left-breast irradiation by comparing dosimetric parameters of 3DCRT, VMAT, and h-VMAT plans in free breathing ...
Shambhavi C, Sarath S. Nair, Jyothi Nagesh, Anshul Singh, Umesh Velu, Ankita Mehta, N. P. Jayashree, Mahak Gupta, Jayapalan Krishnan, Kathiresan K, Vennila J, Shirley Lewis, Krishna Sharan   +12 more
doaj   +1 more source

The Hippocampus Sparing Volume Modulated Arc Therapy does not Influence Plan Quality on Locally Advanced Nasopharyngeal Carcinoma Patients

Scientific Reports, 2017
Irradiation on hippocampus would lead to neuro-cognitive dysfunction in locally advanced nasopharyneal carcinoma (LA-NPC) patients accepting radiotherapy.
Wendong Gu, Qilin Li, Dan Xi, Ye Tian, Juncong Mo, Honglei Pei   +5 more
doaj   +1 more source

Dosimetric study for spine stereotactic body radiation therapy: magnetic resonance guided linear accelerator versus volumetric modulated arc therapy

Radiology and Oncology, 2019
Stereotactic body radiation therapy (SBRT) given in 1-5 fractions is an effective treatment for vertebral metastases. Real-time magnetic resonance-guided radiotherapy (MRgRT) improves soft tissue contrast, which translates into accurate delivery of spine
Yadav Poonam, Musunuru Hima B., Witt Jacob S., Bassetti Michael, Bayouth John, Baschnagel Andrew M.   +5 more
doaj   +1 more source