نتایج جستجو برای: dvh

تعداد نتایج: 574  

2018
Jiahan Zhang Q. Jackie Wu Tianyi Xie Yang Sheng Fang-Fang Yin Yaorong Ge

Knowledge-based planning (KBP) utilizes experienced planners' knowledge embedded in prior plans to estimate optimal achievable dose volume histogram (DVH) of new cases. In the regression-based KBP framework, previously planned patients' anatomical features and DVHs are extracted, and prior knowledge is summarized as the regression coefficients that transform features to organ-at-risk DVH predic...

Journal: :Journal of radiation research 2012
Ken Yoshida Mari Ueda Tadashi Takenaka Hideya Yamazaki Tadayuki Kotsuma Kazumasa Aramoto Shunsuke Miyake Yukihiro Koretsune Chiaki Ban Eiichi Tanaka

We investigated daily needle applicator displacement during multifractionated high-dose-rate interstitial brachytherapy (HDR-ISBT) for postoperative recurrent uterine cancer. Eight patients with postoperative recurrent uterine cancer received HDR-ISBT with or without external beam radiotherapy using our unique ambulatory technique. To analyze displacement, we obtained daily computed tomography ...

2015
Anouchka Fievet Adrien Ducret Tâm Mignot Odile Valette Lydia Robert Romain Pardoux Alain R. Dolla Corinne Aubert

Recent years have seen significant progress in understanding basic bacterial cell cycle properties such as cell growth and cell division. While characterization and regulation of bacterial cell cycle is quite well-documented in the case of fast growing aerobic model organisms, no data has been so far reported for anaerobic bacteria. This lack of information in anaerobic microorganisms can mainl...

Journal: :Physics and Imaging in Radiation Oncology 2023

Deep learning (DL) models are increasingly studied to automate the process of radiotherapy treatment planning. This study evaluates clinical use such a model for whole breast radiotherapy. Treatment plans were automatically generated, after which planners allowed manually adapt them. Plans evaluated based on goals and DVH parameters. Thirty-seven 50plans did fulfill all without adjustments. Thi...

2017
Lucia Clara Orlandini Marianna Coppola Christian Fulcheri Luna Cernusco Pei Wang Luca Cionini

BACKGROUND The cumulative dose was compared with the planned dose among fourteen patients undergoing image-guided, intensity-modulated radiotherapy of the prostate bed. Moreover, we investigated the feasibility of adding dose tracking to the routine workflow for radiotherapy. METHODS Daily cone beam computed tomography was conducted for image-guided radiotherapy, and weekly cumulative deliver...

Journal: :The British journal of radiology 2012
S W Loo W M C Martin P Smith S Cherian T W Roques

OBJECTIVES This study evaluates the interobserver variation in parotid gland delineation and its impact on intensity-modulated radiotherapy (IMRT) solutions. METHODS The CT volumetric data sets of 10 patients with oropharyngeal squamous cell carcinoma who had been treated with parotid-sparing IMRT were used. Four radiation oncologists and three radiologists delineated the parotid gland that h...

2010
Tzung-Chi Huang Ji-An Liang Thomas Dilling Tung-Hsin Wu Geoffrey Zhang

Thoracic cancer treatment presents dosimetric difficulties due to respiratory motion and lung inhomogeneity. Monte Carlo and deformable image registration techniques have been proposed to be used in four-dimensional (4D) dose calculations to overcome the difficulties. This study validates the 4D Monte Carlo dosimetry with measurement, compares 4D dosimetry of different tumor sizes and tumor mot...

2016
Ayyalasomayajula Anil Kumar Roopa Rani Akula Komanduri Ayyangar Reddy P. Krishna Srinivas Vuppu P. V. Lakshmi Narayana A. Durga Prasada Rao

This paper presents a new approach towards the quality assurance of external beam plans using in-house-developed DICOM import and export software in a clinical setup. The new approach is different from what is currently used in most clinics, viz., only MU and point dose are verified. The DICOM-RT software generates ASCII files to import/export structure sets, treatment beam data, and dose-volum...

2012
Jean-Michel Hannoun-Levi Marie-Eve Chand-Fouche Catherine Dejean Adel Courdi

PURPOSE To evaluate a new calculation model estimating the equivalent dose at 2 Gy (EQD2) taking into account dose gradient in high dose rate interstitial brachytherapy (HDRIB). MATERIAL AND METHODS Forty dose-volume histograms (DVHs) of breast (20 pts) and prostate (20 pts) cancer dose distributions were reviewed. Physical prescribed doses (PPD) were 34 Gy (10f/5d) and 18 Gy (6f/2d) for brea...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید