Publications by authors named "Sawwanee Asavaphatiboon"
Impact Assessment of Systemic Geometric Distortion in 1.5T Magnetic Resonance Imaging Simulation through Three-dimensional Geometric Distortion Phantom on Dosimetric Accuracy for Magnetic Resonance Imaging-only Prostate Treatment Planning.
J Med Phys
September 2024
Article Synopsis
- MRI-only radiotherapy helps reduce registration errors that could lead to incorrect dose delivery, but systematic geometric distortion (SGD) from factors like magnetic field inhomogeneity must be addressed.
- The study assessed SGD in 1.5T MRI simulations using a 3D geometric phantom and analyzed its effects on dosimetric accuracy for ten prostate cancer patients treated with volumetric modulated arc radiotherapy (VMAT).
- Results showed that SGD increased with distance from the isocenter, and while dosimetric accuracy was generally high (under 2% error for most structures), the bladder and rectum exhibited exceptions, underscoring the need for SGD assessment in quality assurance before treatment planning.
Reducing emergency CT radiation doses with simple techniques: A quality initiative project.
J Med Imaging Radiat Oncol
February 2016
Introduction: Use of indication-specific CT protocols and adjustment of scan parameters to decrease radiation exposure may result in significant dose reduction. We implemented these strategies and compare pre- and post-implementation radiation dose in emergency department (ED) patients.
Method: This was a descriptive, retrospective study.
Furious and paralytic rabies differ in clinical manifestations and survival periods. The authors studied magnetic resonance imaging (MRI) and cytokine and virus distribution in rabies-infected dogs of both clinical types. MRI examination of the brain and upper spinal cord was performed in two furious and two paralytic dogs during the early clinical stage.
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