Introduction: Lung cancer is one of the most common causes of cancer-related deaths worldwide. Nowadays PET/CT plays an essential role in radiotherapy planning specially for lung tumors as it provides anatomical and functional information simultaneously that is effective in accurate tumor delineation. The optimal segmentation method has not been introduced yet, however several ...

introduction: transient cavitations induced by low frequency irradiation of ultrasound can be used to treat tumors. previous studies in in-vitro experiments have shown that induced cavitation by dual or multiple frequencies of ultrasound is greater than induced cavitation by single frequency irradiation. in this study, we compared and evaluated the treatment effects of dual frequency irradiatio...

PURPOSE To assess the potential dosimetric benefits associated with the CyberKnife (CK) tumor tracking capability, wherein an extra margin for respiratory tumor motion is not required, when compared to respiratory-gated volumetric-modulated arc therapy (VMAT) for hepatocellular carcinoma (HCC). METHODS Twenty-nine HCC patients previously treated with double-arc VMAT were enrolled. In each VMA...

BACKGROUND To evaluate the accuracy of the combined maximum and minimum intensity projection-based internal target volume (ITV) delineation in 4-dimensional (4D) CT scans for liver malignancies. METHODS 4D CT with synchronized IV contrast data were acquired from 15 liver cancer patients (4 hepatocellular carcinomas; 11 hepatic metastases). We used five approaches to determine ITVs: (1). ITVAl...

In the article published in Volume 27, issue 158, 2017, the Results section in English Abstract have been published incorrectly. The correct Results is given below:   Results: The most frequent sizes of mass were 2-4 cm (n=33, 54%) and 4-5 cm (n=23, 38%). Among the patients, 35 (67.3%) had one tumor before, in 11.5% renew tumor happened, and 65.4% had one tumor after treatment. Liver tum...

The aim of this paper is to demonstrate the impact that Web technologies and meta computing can have on the simulation of biological processes such as tumor growth. A client-server architecture allowing real time surface and volume rendering using a standard Web browser is proposed. A simplified three-dimensional cytokinetic simulation model of tumor growth in vitro is developed and results are...

Introduction: The primary and definitive diagnosis of meningioma is based on histological assessment; however, employing imaging methods, like Magnetic Resonance Imaging (MRI) is very helpful to describe lesion’s characteristics. Accordingly, we decided to study the effect of imaging factors, like MRI data on the volume of hemorrhage (estimated blood loss) during meningioma surgery. Methods: T...

Transmissible venereal tumor (TVT) is a round cell type neoplasia that transmitted by mating and physical transfer of cells. It one the most common benign tumors in dogs can be seen both gender. The external genital area main location tumor. However, internal organ metastasis has been reported. clinical signs are lobular masses which caudal part penis, posterior region vagina at vestibulovagina...