نتایج جستجو برای: mri radiotherapy

تعداد نتایج: 165847  

Journal: :Radiotherapy and Oncology 2021

Background and purpose Tumour growth during radiotherapy may lead to geographical misses of the target volume. This study investigates evolution tumour extent evaluates need for plan adaptation ensure dose coverage in glioblastoma patients. Materials methods The prospective included 29 patients referred 59.4 Gy 33 fractions. Magnetic resonance imaging (MRI) was performed at time treatment plann...

Journal: :British Journal of Surgery 2021

Abstract This is a rare presentation of an impacted gallstone leading to ileovaginal fistula. A 76-year old female presented with 4 week history faecal vaginal discharge and weight loss on background endometrial cancer treated chemotherapy radiotherapy 9 years ago. She was initially investigated pelvc MRI which showed collection in the stump. further abdominal pelvic CT scan revealed cholecysto...

2017
Ki Mun Kang Hoon Sik Choi Bae Kwon Jeong Jin Ho Song In-Bong Ha Yun Hee Lee Chul Hang Kim Hojin Jeong

An alternative pseudo CT generation method for magnetic resonance image (MRI)-based radiotherapy planning was investigated in the work. A pseudo CT was initially generated using the rigid image registration between the planning MRI and previously acquired diagnostic CT scan. The pseudo CT generated was then refined to have the same morphology with that of the referenced planning image scan by a...

2016
Emma C. Fields Elisabeth Weiss

Cervical cancer is a leading cause of mortality in women worldwide. Staging and management of cervical cancer has for many years been based on clinical exam and basic imaging such as intravenous pyelogram and x-ray. Unfortunately, despite advances in radiotherapy and the inclusion of chemotherapy in the standard plan for locally advanced disease, local control has been unsatisfactory. This situ...

Journal: :Critical Reviews in Oncology Hematology 2021

• Neoadjuvant chemo-radiotherapy is increasingly used to treat soft tissue sarcomas. The radiology-pathology correlation of treatment-related changes not yet settled Standardization in reports critical evaluate correlation. Choi criteria better reflect tumour response compared RECIST criteria. Radiomics emerging as a powerful tool predict response. Soft sarcomas (STS) represent broad family rar...

Journal: :Arquivos Brasileiros de Neurocirurgia 2022

Abstract Introduction Ewing sarcomas are a family of tumors that can be skeletal or extraskeletal origin. We report rare case child with sarcoma in the thoracolumbar epidural space. Case Report The patient was 1-year-old female sphincter alteration, flaccid paraplegia, and areflexia. A magnetic resonance imaging (MRI) scan showed large extensive lesion compression dural sac D6–L2 segment, left ...

2015
M. J. Warren A. Eddy

This discussion paper will explore the impact of using Magnetic Resonance Imaging (MRI) in the treatment of cervical cancer with brachytherapy. It is written from the perspective of current departmental practice in the UK and aims to highlight the issues associated with using MRI as a tool for image guided brachytherapy planning. To support the discussion, a literature review was undertaken foc...

A.R. Nikofar, B. Bolouri, H.R. Baghani, M. Robatjazi, S.R. Mahdavi,

Background: For the purpose of individual clinical target volume assessment in radiotherapy of prostate cancer, MRSI was used as a molecular imaging modality with MRI and CT images. Materials and Methods: The images of 20 prostate cancer patients were used in this study. The MR and MRSI images were registered with CT ones using non-rigid registration technique. The CT based planning (BP), CT/MR...

Journal: :Türkiye Klinikleri Journal of Case Reports 2022

Trigeminal schwannoma is a neurogenic tumor of the fifth cranial nerve. Despite advances in surgical practice, stereotactic radiosurgery an alternative treatment management these patients due to problems such as nerve injuries and accessibility The patient was admitted our hospital with complaints headache tingling left face for last few months. discussed neurooncology council intervention not ...

A.H. Barati, H.A. Nedaie, M. Afkhami, M. Yarahmadi, M.H. Zahmatkesh, W. Parwaie,

Background: Accurate small radiation field dosimetry is essential in modern radiotherapy techniques such as stereotactic radiosurgery (SRS) and intensity modulated radiotherapy (IMRT). Precise measurement of dosimetric parameters such as beam profile, percentage depth doses and output factor of these beams are complicated due to the electron disequilibrium and the steep dose gradients. In the p...

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