A5079621403- Advanced Radiotherapy Techniques
- Digital Radiography and Breast Imaging
- Radiation Therapy and Dosimetry
- Advanced X-ray and CT Imaging
- Radiation Dose and Imaging
- Medical Imaging Techniques and Applications
- Ovarian function and disorders
- Obstructive Sleep Apnea Research
- Receptor Mechanisms and Signaling
- Neuroscience and Neuropharmacology Research
- Advanced biosensing and bioanalysis techniques
- Breast Cancer Treatment Studies
- Oropharyngeal Anatomy and Pathologies
- DNA and Nucleic Acid Chemistry
- Temporomandibular Joint Disorders
- Advances in Oncology and Radiotherapy
- Ectopic Pregnancy Diagnosis and Management
- Reproductive Health and Contraception
- Infrared Thermography in Medicine
- RNA Interference and Gene Delivery
- Cardiac Ischemia and Reperfusion
- Radiation Effects and Dosimetry
- Radiation Detection and Scintillator Technologies
University of Florida
2000-2024
Taoyuan Armed Forces General Hospital
2018
NewYork–Presbyterian Hospital
2009-2014
Chang Gung University
2011
Memorial Sloan Kettering Cancer Center
2011
Chiayi Chang Gung Memorial Hospital
2011
Christiana Care Health System
2006-2011
Columbia University Irving Medical Center
2010
New York Hospital Queens
2010
Cornell University
2009
Summary Objective The aim of this study was to analyse morphological changes in the upper airways patients with anterior open bite treated temporary anchorage devices for intrusion posterior teeth. Materials and Methods Twelve nonobese (body mass index: <25) between ages 19 44 years (mean age: 22.83 ± 8.19 years) were recruited study. Cephalometric radiographs magnetic resonance imaging ( MRI ) scans before after closure without bracketing on teeth used measure airway, which divided into...
Purpose: Megavoltage Cone‐Beam CT (MVCBCT) is an essential image guided radiation therapy (IGRT) device to acquire patient's daily treatment for accurate localization of targets. The objective this research was assess its qualities. Method and Materials: quality MVCBCT assessed by four indicators: noise, contrast, spatial resolution, intensity stability. A electron density phantom a Siemens calibration were used. images acquired under various MU settings. Syngo processing software used...
Purpose: Our intention was to perform some machine quality assurance (QA) tests that require the use of films with electronic portal imaging device (EPID). A software tool designed for these tasks which include Light vs Radiation Field, Isocenter Star Shot, Winston‐Lutz and MLC Picket Fence images. Methods: For BB dots were placed on tabletop indicate light field double‐exposure technique used enhance display dots. Table a square used, steel ruler table show one major axis test, we small...
Purpose: IGRT has become an essential modality to accurately setup patients for radiation treatment. 4D/CT/PET systems generating multiple phases of respiration image‐sets have greatly helped clinicians contour integrated target volumes. However, creates 30–40‐times more image data. PACS important in modern Radiotherapy massive storage needs. In this study, we defined a new system by expanding into RT extension cover additional non‐DICOM, RT‐specified data and intra‐departmental...
The quantification accuracy of dual-energy imaging is influenced by the fundamentals x-ray physics, system geometry, data acquisition hardware/protocol, calibration, and image processing technique. This symposium will provide updates on following advanced application areas: Mammography. Volumetric breast density techniques based standard mammograms require estimation thickness, which difficult to accurately measure. By comparison, calculation using dual energy mammography does not...
Purpose: Accurate dose delivery is a key component in the success of radiation therapy. The verification especially important high complexity treatments, such as Intensity Modulated Radiation Therapy (IMRT) and Volumetric Arc (VMAT). Our purpose was to evaluate dosimetric performance our newly installed Elekta Synergy linear accelerator Philips Pinnacle3 Planning system. Methods: PTW Seven29 2D‐ARRAY consists 729 vented ionization chambers with dedicated phantom called Octavius were used...
The use of an unfiattened photon beam for radiotherapy treatment is a new concept in the Radiation Oncology field. In past, non-optimal radiation area coverage obtained with beams was concern, and flattening filter introduced to overcome this pitfall. With advance technology, Intensity Modulated Radiotherapy (IMRT) emerged no longer issue since intensity could be modulated obtain desired target coverage. Unfiattened offer several advantages over flattened beams, namely: (1) they provide 2 4...
Purpose: To measure the output of IORT applicators used with miniaturized 50 kVp X‐Ray source Axxent electronic brachytherapy system. Method and Materials: Brachytherapy dose calculations are based on a set measured or calculated dosimetry parameters for source. They to calculate when is surrounded by soft tissue. Clinical examples partial breast irradiation intracavitary vaginal applications. In situations though, where within an applicator external tissue, direct measurements specific...
The rapid dose fall-off from treatment target to the adjacent critical organs has been Holy Grail for radiotherapy planning. modern delivery technologies address such goal include volumetric modulated rotational therapy, non-coplanar EVIRT beams and use of unflattened reduce penumbra area. In this lecture, integration above techniques will be presented achieve a sharp gradient around also discussion middle low volumes. Use therapy by multiple arcs is an idea modality focus high in area while...
Purpose: Megavoltage (MV) cone beam computed tomography (CBCT) using softer spectrum by either lowering the accelerating potential or low-Z targets has been considered for image-guided radiotherapy (IGRT). In this study, projection images 250 kVp, 1 MV and 6 photons were simulated image qualities of reconstructed CBCT compared. Method Materials: The Monte Carlo code EGSnrc/DOSXYZnrc was used to simulate reconstruction photons. voxel phantom calculation created from CT an ACR accredit with...
Purpose: To compare daily clinical IMRT delivery efficiency in 6 institutions using different accelerators, techniques, treatment planning systems, and practice environments; to deduce key contributing factors for improvement. Method Materials: MUs, time (time elapsed between beam‐ON of the 1 st field beam‐OFF last field), other parameters from Record & Verify systems 421 patients accelerators 4 vendors are retrospectively analyzed. treatments delivered compensator‐IMRT on Siemens,...