نتایج جستجو برای: mri radiotherapy
تعداد نتایج: 165847 فیلتر نتایج به سال:
Primary treatment of rectal cancer was the focus of the second St. Gallen European Organisation for Research and Treatment of Cancer (EORTC) Gastrointestinal Cancer Conference. In the context of the conference, a multidisciplinary international expert panel discussed and voted on controversial issues which could not be easily answered using published evidence. Main topics included optimal preth...
Upright radiotherapy is not new. It has been practiced for specialized treatments such as boron neutron capture therapy, light ion and even photon therapy before isocentric C-arm gantries became standardized more than 60 years ago. Today, treatment planning relies on CT and/or MRI systems which were typically designed only recumbent positioning, however, lately scanners that can scan patients i...
We report a 62-year-old female patient who came to our institution due pain and limited movements in the neck area, nausea, headache. The magnetic resonance imaging (MRI) revealed single larger two smaller lesions with appearance of cavernomas left parietal brain region. was consulted neurosurgeon judged be inoperable. Radiosurgery performed the cavernoma total focal dose 15Gy. 11 months afte...
BACKGROUND To analyze the longitudinal length accuracy of gross tumor volume (GTV) delineation with diffusion weighted magnetic resonance imaging for esophageal squamous cell carcinoma (SCC). METHODS Forty-two patients from December 2011 to June 2012 with esophageal SCC who underwent radical surgery were analyzed. Routine computed tomography (CT) scan, T2-weighted MRI and diffusion weighted m...
Purpose To develop a robust and clinically applicable automated method for analyzing Dynamic Contrast Enhanced (DCE-) MRI of the prostate as a guide for targeted biopsies and treatments. Materials and methods An unsupervised pattern recognition (PR) method was used to analyze prostate DCE-MRI from 71 sequential radiotherapy patients. Identified regions of interest (ROIs) with increased perfus...
Introduction Polymer gel dosimeters offer a practical solution to 3D dose verification for conventional radiotherapy as well as intensity-modulated and stereotactic radiotherapy. In this study, EGSnrc calculated and PAGAT polymer gel dosimeter measured dose profiles from single shot irradiation with 18 mm collimator of Gamma Knife in homogeneous and inhomogeneous phantoms were compared with eac...
The purpose of this study was to determine the value of different imaging modalities, that is, magnetic resonance imaging/spectroscopy (MRI/MRS) and positron emission tomography (PET), to assess early tumor response to sorafenib with or without radiotherapy. Diffusion-weighted (DW)-MRI, choline (1)H MRS at 11.7 T, and (18)F-FLT PET imaging were used to image fibrosarcoma (FSaII) tumor-bearing m...
Breast cancer and lung cancer are the most common tumors that metastasize to iris. The metastasis of iris was generally diagnosed on ophthalmologic examination. In this case, we reported iris metastasis of patients with adenocarcinoma of breast cancer and MRI findings. We report a case of a 51-year-old. She was diagnosed breast cancer two years ago. After adjuvant chemotherapy, radiotherapy and...
BACKGROUND The use of a single MRI and 18F-fluoro deoxyglucose positron emission tomography-CT (18F-FDG PET-CT) was evaluated, both in diagnostic procedure and radiotherapy planning, in patients with head and neck cancer. METHODS Thirty-five patients with nasopharyngeal and oropharyngeal tumors were studied. The MRI and 18F-FDG PET-CT were used for both diagnostic work-up and gross tumor volu...
purpose : to present a patient with radiation chiasma neuropathy, secondary to radiotherapy of paranasal sinus lymphoma who was referred for evaluation of gradual decrease of vision in both eyes case report : the patient was a 38-year-old male, with history of right maxillary sinus lymphoma, who underwent surgery, chemotherapy and radiation therapy. one year after radiotherapy, he noticed gradu...
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