This study investigated the potential of a newly proposed scattering foil free (SFF) electron beam scanning technique for the treatment of skin cancer on the irregular patient surfaces using Monte Carlo (MC) simulation. After benchmarking of the MC simulations, we removed the scattering foil to generate SFF electron beams. Cylindrical and spherical phantoms with 1 cm boluses were generated and the target volume was defined from the surface to 5 mm depth. The SFF scanning technique with 6 MeV electrons was simulated using those phantoms. For comparison, volumetric modulated arc therapy (VMAT) plans were also generated with two full arcs and 6 MV photon beams. When the scanning resolution resulted in a larger separation between beams than the field size, the plan qualities were worsened. In the cylindrical phantom with a radius of 10 cm, the conformity indices, homogeneity indices and body mean doses of the SFF plans (scanning resolution = 1°) vs. VMAT plans were 1.04 vs. 1.54, 1.10 vs. 1.12 and 5 Gy vs. 14 Gy, respectively. Those of the spherical phantom were 1.04 vs. 1.83, 1.08 vs. 1.09 and 7 Gy vs. 26 Gy, respectively. The proposed SFF plans showed superior dose distributions compared to the VMAT plans.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5426680 | PMC |
| http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0177380 | PLOS |
Publication Analysis
Top Keywords
Similar Publications
A review of state-of-the-art resolution improvement techniques in SPECT imaging.
EJNMMI Phys
January 2025
Department of Nuclear Medicine, Division of Life Sciences and Medicine, The First Affiliated Hospital of USTC, University of Science and Technology of China, Hefei, 230001, Anhui, China.
Single photon emission computed tomography (SPECT), a technique capable of capturing functional and molecular information, has been widely adopted in theranostics applications across various fields, including cardiology, neurology, and oncology. The spatial resolution of SPECT imaging is relatively poor, which poses a significant limitation, especially the visualization of small lesions. The main factors affecting the limited spatial resolution of SPECT include projection sampling techniques, hardware and software.
View Article and Find Full Text PDFIncisional PSMA PET/CT-positive recurrences in prostate cancer- is there an implication on clinical care?
Clin Exp Metastasis
January 2025
Martini-Klinik Prostate Cancer Center, University Hospital Hamburg-Eppendorf, Hamburg, Germany.
Oligorecurrent prostate cancer (PCa) can be treated with metastasis-directed therapy (MDT), which may be performed using radioguided surgery (RGS) as an experimental approach. These procedures have shown promising outcomes, largely due to the high lesion detection rate of positron emission tomography/computed tomography (PET/CT). We present a case series of patients who underwent RGS following robot-assisted radical prostatectomy (RARP).
View Article and Find Full Text PDFArtificial intelligence for segmentation and classification in lumbar spinal stenosis: an overview of current methods.
Eur Spine J
January 2025
Department of Neurosurgery, Leiden University Medical Center, Albinusdreef 2, 2333ZA, Leiden, The Netherlands.
Purpose: Lumbar spinal stenosis (LSS) is a frequently occurring condition defined by narrowing of the spinal or nerve root canal due to degenerative changes. Physicians use MRI scans to determine the severity of stenosis, occasionally complementing it with X-ray or CT scans during the diagnostic work-up. However, manual grading of stenosis is time-consuming and induces inter-reader variability as a standardized grading system is lacking.
View Article and Find Full Text PDFFAP-targeted PET/CT imaging in patients with breast cancer from a prospective bi-center study: insights into diagnosis and clinic management.
Eur J Nucl Med Mol Imaging
January 2025
Department of Nuclear Medicine and Minnan PET Center, Xiamen Key Laboratory of Radiopharmaceuticals, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China.
Purpose: To evaluate the diagnostic accuracy and clinical impact of fibroblast activation protein (FAP)-targeted PET/CT imaging in primary and metastatic breast cancer and compare the results with those of standard-of-care imaging (SCI) and [F]FDG PET/CT.
Methods: We prospectively analyzed patients with diagnosed or suspected breast cancer who underwent concomitant FAP-targeted PET/CT (radiotracers including either [Ga]Ga-FAPI-46 or [F]FAPI-42) and [F]FDG PET/CT scans from June 2020 to January 2024 at two medical centers. Breast ultrasound (US) imaging was performed in all treatment-naïve patients as SCI.
Noncardiac chest computerized tomography scan as a predictor for plaque presence in coronary artery.
Coron Artery Dis
January 2025
Intensive Cardiac Care Department, Ziv Medical Center.
Background: Coronary artery calcium, a marker of coronary atherosclerosis, is often identified on noncoronary chest computed tomography (CT). We wanted to evaluate the correlation between the presence of coronary plaques in coronary artery catheterization and coronary calcifications as shown in noncardiac chest CT.
Methods: A retrospective case-control study consisting of cases (N = 63) and controls (N = 29), aged 18-70 years old, residing in northern Israel and treated in the Intensive Cardiac Care Unit of Ziv Medical Center, between January 2020 and November 2022.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!