Liver is the largest internal organ in human body. It lies under right ribs just beneath right lung, shaped like a pyramid and divided into four different lobes. It is the only internal organ which has the property of regeneration of lost tissue. It plays major role in metabolism, emulsification of lipids and stores nutrients. Accurate segmentation of liver is still a challenge due to differenc...

Introduction: Crater detection algorithms (CDA) have greatly evolved in the last decade and are detecting much smaller structures with higher performances [1-3] which is permitting their use in the construction and upgrade of crater catalogues, namely for Mars [4] and Phobos [5]. Although improvements are still required in the CDA, namely for detecting metric craters in diameter with the same h...

Binary codes can be used to speed up nearest neighbor search tasks in large scale data sets as they are efficient for both storage and retrieval. In this paper, we propose a robust auto-encoder model that preserves the geometric relationships of high-dimensional data sets in Hamming space. This is done by considering a noise-removing function in a region surrounding the manifold where the train...

Auto-encoder is a special kind of neural network based on reconstruction. De-noising auto-encoder (DAE) is an improved auto-encoder which is robust to the input by corrupting the original data first and then reconstructing the original input by minimizing the reconstruction error function. And contractive auto-encoder (CAE) is another kind of improved auto-encoder to learn robust feature by int...

BACKGROUND AND PURPOSE Delineation of clinical target volumes (CTVs) is a weak link in radiation therapy (RT), and large inter-observer variation is seen in breast cancer patients. Several guidelines have been proposed, but most result in larger CTVs than based on conventional simulator-based RT. The aim was to develop a delineation guideline obtained by consensus between a broad European group...

AIM To evaluate whether virtual chromoendoscopy can improve the delineation of small bowel lesions previously detected by conventional white light small bowel capsule endoscopy (SBCE). METHODS Retrospective single center study. One hundred lesions selected from forty-nine consecutive conventional white light SBCE (SBCE-WL) examinations were included. Lesions were reviewed at three Flexible Sp...

BACKGROUND Auto-positive end-expiratory pressure (auto-PEEP) may substantially increase the inspiratory effort during assisted mechanical ventilation. Purpose of this study was to assess whether the electrical activity of the diaphragm (EAdi) signal can be reliably used to estimate auto-PEEP in patients undergoing pressure support ventilation and neurally adjusted ventilatory assist (NAVA) and ...

Quantitative analysis of the left ventricle wall motion is important for the diagnosis of coronary heart disease. From wall motion, stroke volume, ejection fraction, and velocity of ventricular circumference can be estimated. These are helpful in identifying the state of diseased hearts. This paper describes a left ventricle boundary delineation algorithm which operates on X-Ray image data sets...

BACKGROUND Modern radiotherapy techniques enable delivery of high doses to the target volume without escalating dose to organs at risk, offering the possibility of better local control while preserving good quality of life. Uncertainties in target volume delineation have been demonstrated for most tumour sites, and various studies indicate that inconsistencies in target volume delineation may b...

BACKGROUND Metabolic tumor volume assessment using positron-emission tomography [PET] may be of interest for both target volume definition in radiotherapy and monitoring response to therapy. It has been reported, however, that metabolic volumes derived from images of metabolic rate of glucose (generated using Patlak analysis) are smaller than those derived from standardized uptake value [SUV] i...