نتایج جستجو برای: مقاومت به ctv

تعداد نتایج: 689634  

Journal: :Chemical communications 2014
Jing-Ru Song Junliang Sun Junmin Liu Zhi-Tang Huang Qi-Yu Zheng

Two new 2D COFs were synthesized from triformylcyclotrianisylene, which show not only thermal stability but also hydrolytic stability. CTV-COF-1 with smaller pore size stored a high hydrogen level of 1.3 wt% at low pressure, while CTV-COF-2 with larger pore size showed superior carbon dioxide uptake, up to 250 cm(3) g(-1) at 298 K and 50 bar.

2014
Ken Yoshida Tadashi Takenaka Hironori Akiyama Hideya Yamazaki Mineo Yoshida Koji Masui Tadayuki Kotsuma SungJae Baek Yasuo Uesugi Taiju Shimbo Nobuhiko Yoshikawa Takumi Arika Yukihiro Koretsune Yasuo Yoshioka Yoshifumi Narumi Eiichi Tanaka

To investigate the influence of a 3D image-based treatment-planning method for high-dose-rate interstitial brachytherapy (HDR-ISBT) for mobile tongue cancer, we analyzed dose-volume histogram results for the clinical target volume (CTV) and the mandible. Between October 2010 and November 2011, one and four patients having T2 and T3 tumors, respectively, were treated with HDR-ISBT. Multiplane im...

Journal: :Cancer research 2005
Devanand Sarkar Zao-zhong Su Nicolaq Vozhilla Eun Sook Park Aaron Randolph Kristoffer Valerie Paul B Fisher

Pancreatic cancer is an aggressive neoplasm with no current viable, effective treatment options. In the majority of cases, at first diagnosis, pancreatic cancer has already become metastatic so that conventional treatment regimens provide minimal, if any, clinical benefit in prolonging life or ameliorating the negative prognosis of this disease. These harsh realities underscore the need for dev...

2013
Alaaddin Nayman Kemal Odev

The aim of our study was to investigate the contribution of CT angiography in cases with a presumptive PTE diagnosis, evaluating lower extremity veins with CT venography and color Doppler ultrasonography (CDU) and the role of these methods at diagnosis of DVT. 46 patients with presumptive diagnosis of PTE which was confirmed with a positive CT angiography (CTA) were included in the study. Lower...

2012
Yi Wang Wei-Jun Ye Le-Hui Du Ai-Ju Li Yu-Feng Ren Xin-Ping Cao

Currently, image-based 3-dimentional (3D) planning brachytherapy allows for a better assessment of gross tumor volume (GTV) and the definition and delineation of target volume in cervix cancer. In this study, we investigated the feasibility of our novel computed tomography (CT)-guided free-hand high-dose-rate interstitial brachytherapy (HDRISBT) technique for cervical cancer by evaluating the d...

Journal: :Asian journal of oncology 2021

Concurrent chemoradiotherapy is considered the standard treatment for locally advanced cancer cervix (LACC). Radiotherapy commonly administered by a three-dimensional conformal radiotherapy (3DCRT) approach followed brachytherapy (BT). High dose rate (HDR) BT administered; however, several drawbacks exist including invasive technique, pain, requirement of anesthesia, and operative risks. We ass...

2002
Brent C. Parker Almon S. Shiu Moshe H. Maor Frederick F. Lang H. Helen Liu R. Allen White John A. Antolak

The planning target volume (PTV) includes the clinical target volume (CTV) to be irradiated and a margin to account for uncertainties in the treatment process. Uncertainties in miniature multileaf collimator (mMLC) leaf positioning, CT scanner spatial localization, CT-MRI image fusion spatial localization, and Gill-Thomas-Cosman (GTC) relocatable head frame repositioning were quantified for the...

Journal: :The British journal of radiology 2002
G L Sannazzari R Ragona M G Ruo Redda F R Giglioli G Isolato A Guarneri

The objective of this study was to assess the utility of CT-MRI image fusion software and compare both prostate volume and localization with CT and MRI studies. We evaluated the differences in clinical volumes in patients undergoing three-dimensional conformal radiation therapy for localized prostate cancer. After several tests performed to ensure the quality of image fusion software, eight pat...

2017
Ryosuke Takenaka Akihiro Haga Hideomi Yamashita Keiichi Nakagawa

Recently, intensity-modulated radiation therapy (IMRT) has been used for total-body irradiation (TBI). Since the planning target volume (PTV) for TBI includes the surrounding air, a dose prescription to the PTV provides high fluence to the body surface. Thus with just a small set-up error, the body might be exposed to a high-fluence beam. This study aims to assess which target volume should be ...

2014
Jun Liang Minghui Li Tao Zhang Wei Han Dongfu Chen Zhouguang Hui Jima Lv Zhong Zhang Yin Zhang Liansheng Zhang Rong Zheng Jianrong Dai Luhua Wang

IntroductionThis study aimed to evaluate the effect of image-guided radiation therapy (IGRT) on the margin between the clinical target volume (CTV) and planning target volume (PTV) in lung cancer. MethodsThe CTV and PTV margin were determined in three dimensions by four radiation oncologists using a standard method in 10 lung cancer patients, and compared to consensus values. Transfer error was...

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