نتایج جستجو برای: proximal contour

تعداد نتایج: 91369  

Journal: :journal of medical signals and sensors 0
zahra shahvaran kamran kazemi mohammad sadegh helfroush nassin jafarian

this paper represents a new region-based active contour model that can be used to segment images with intensity non-uniformity and high level noise. the main idea of our proposed method is to use gaussian distributions with different means and variances with incorporation of intensity non-uniformity model for image segmentation. in order to integrate the spatial information between neighboring ...

Journal: :Vision Research 2003
Robert F. Hess Timothy Ledgeway

It is now accepted that the visual system integrates local orientation information across space to define spatial contours [Vision Research 33 (1993) 173]. More recently, it has been shown that similar integration occurs for the direction of local motion signals, in different parts of the visual field, if they are aligned along the axis of a spatial contour [Vision Research 42 (2002) 653]. Here...

Journal: :International Journal of Computer Vision 2009

2015
Sarah Feger Matthias Rief Elke Zimmermann Peter Martus Joanne Désirée Schuijf Jörg Blobel Felicitas Richter Marc Dewey

PURPOSE The aim of this study was the systematic image quality evaluation of coronary CT angiography (CTA), reconstructed with the 3 different levels of adaptive iterative dose reduction (AIDR 3D) and compared to filtered back projection (FBP) with quantum denoising software (QDS). METHODS Standard-dose CTA raw data of 30 patients with mean radiation dose of 3.2 ± 2.6 mSv were reconstructed u...

Journal: :Robotica 2006
Masahiro Ohka Jyunichi Takayanagi Takuya Kawamura Yasunaga Mitsuya

Tactile sensing is advantageous for the acquisition of local, proximal information such as the contact condition between a finger and an object. This type of sensing, however, is not suited for recognizing an entire object that is easily recognized by vision. The objective of this paper is to ease the limitations experienced in tactile sensing by using both a neural model based on the human tac...

Journal: :Journal of nuclear medicine : official publication, Society of Nuclear Medicine 1987
L C Swayne D Heitner J B Rubenstein A Fernandez G Niknejad

The cholecystokinin cholescintigraphic findings of fundal adenomyomatosis in a 29-yr-old male with severe post-prandial pain are presented. Planar cholescintigraphy demonstrated a trilobed gallbladder contour. Following the administration of 0.02 micrograms/kg of cholecystokinin at maximal gallbladder filling, fundal dyskinesia was observed. Regional gallbladder ejection fractions were: whole g...

Journal: :iranian red crescent medical journal 0
ali yeganeh orthopedic department, rasoolakram hospital, tehran, ir iran; orthopedic department, rasool-akram hospital, tehran, ir iran. tel.:+98-9123216055, fax: +98-2166554785 gholamreza shah-hoseini orthopedic department, rasoolakram hospital, tehran, ir iran yaser ghavami general practitioners, tehran university of medical sciences, tehran, ir iran

Journal: :Journal of biomechanical engineering 2015
Daniel Simões Lopes Richard R Neptune Artur A Gonçalves Jorge A Ambrósio Miguel T Silva

In this work, MacConaill's classification that the articular surface of the femoral head is better represented by ovoidal shapes rather than purely spherical shapes is computationally tested. To test MacConaill's classification, a surface fitting framework was developed to fit spheres, ellipsoids, superellipsoids, ovoids, and superovoids to computed tomography (CT) data of the femoral proximal ...

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