Osorio Rivera Fray León¹

The International Conference on Computational & Experimental Engineering and Sciences, Vol.7, No.2, pp. 63-76, 2008, DOI:10.3970/icces.2008.007.063

Abstract In the development context of a project about a system of selection uchuva for export by means of artificial vision whose objective is to provide an electromechanical system to able to select uchuvas by searching on its physical appearance, some algorithms have been developed to extract the necessary details beginning with the image of the acquired fruit using a camera. As a result, it must be able to determine if the visualized uchuva presents some symptom (insects, fungus, and deterioration) that indicates if it should be discharged. More >

Liviu Marin¹, Henry Power¹, Richard W. Bowtell², Clemente Cobos Sanchez², Adib A. Becker¹, Paul Glover²，Arthur Jones¹

CMES-Computer Modeling in Engineering & Sciences, Vol.23, No.3, pp. 149-174, 2008, DOI:10.3970/cmes.2008.023.149

Abstract We investigate the reconstruction of a divergence-free surface current distribution from knowledge of the magnetic flux density in a prescribed region of interest in the framework of static electromagnetism. This inverse problem is motivated by the design of gradient coils for use in magnetic resonance imaging (MRI) and is formulated using its corresponding integral representation according to potential theory. A novel boundary element method (BEM) which employs linear interpolation on quadratic surfaces and also satisfies the continuity equation for the current density, i.e. a divergence-free BEM, is presented. Since the discretised BEM system is ill-posed More >

Michael J. Manyak

Canadian Journal of Urology, Vol.14, Suppl.6, pp. 32-38, 2007

Abstract Rapid advances in imaging technology have whetted our collective appetites for practical clinical applications to assist the physician and patient in therapeutic decisions. Current limitations of imaging technology are being addressed by the convergence of technology in materials science, the computer industry, and biology which have led to improvements of diagnostic imaging. Refinements in image acquisition, fusion of images, and outcomes data now suggest use for image-guided therapy. Novel imaging agents and technologies appear to provide improved capabilities to detect malignant lymph nodes. Future applications of optical coherence tomography, electron paramagnetic resonance imaging, nanotechnology, and More >

Kalyan C. Latchamsetty, Lester S. Borden, Jr, Christopher R. Porter, Marc Lacrampe, Matthew Vaughan, Eugene Lin, Neal Conti, Jonathan L. Wright, John M. Corman

Canadian Journal of Urology, Vol.14, No.1, pp. 3429-3434, 2007

Abstract Introduction: Accurate clinical staging is critical in guiding treatment for patients with prostate adenocarcinoma. Endorectal magnetic resonance imaging (MRI) has been advocated to improve staging accuracy. In order to assess the learning curve for endorectal MRI interpretation, we compared two cohorts of patients with high-risk prostate who underwent endorectal MRI at a center with limited prior exposure to this imaging modality.
Materials and methods: Data for all patients who received a preoperative endorectal MRI followed by radical prostatectomy were prospectively collected. MRI was performed in patients with a high level of suspicion for extracapsular disease based on… More >

Britton E. Tisdale¹, D. Robert Siemens¹, John Lysack², Robert L. Nolan², James W. L. Wilson¹

Canadian Journal of Urology, Vol.14, No.2, pp. 3489-3492, 2007

Abstract Objectives: To correlate the measured dimensions of urinary stones from spiral non-contrast computerized tomography (CT) with that of plain radiography (KUB).
Methods: The transverse diameter as reported on CT was compared to the measured transverse diameter on KUB for 61 stones. The transverse and craniocaudal dimensions on CT were then re-measured for 30 urinary stones and again compared to the re-measured values for KUB. The craniocaudal dimension on CT was determined by measuring the stone on reconstructed coronal CT images. Measurements between imaging modalities were blinded and performed consecutively by a dedicated investigator.
Results: The mean transverse… More >

Can Talug, Jeffrey Mullins, Susan E. Saunders, Stanley Zaslau

Canadian Journal of Urology, Vol.14, No.5, pp. 3707-3709, 2007

Abstract In a patient with a prior history of pancreatitis or abdominal trauma, radiographic imaging may only show abnormalities in the urinary tract. When these patients are first seen with subcapsular or perinephric fluid collections, percutaneous drainage can be both diagnostic and therapeutic. More >

R.E. Meyers¹, K.S. Deacon¹

The International Conference on Computational & Experimental Engineering and Sciences, Vol.3, No.4, pp. 211-216, 2007, DOI:10.3970/icces.2007.003.211

Abstract Using a CCD camera we investigated and successfully achieved quantum ghost imaging of the stencil letters "ARL" placed in front of a photon bucket detector from photons which did not interact with the stencil letter object. We investigated the role of speckle spatial size and time scales in resolving images. The process suggests new mathematical paradigms and important applications for quantum ghost imaging . More >

Michael L. Pianezza¹, Aiden Mokhtassi², Louis Wu², R. John D’A. Honey¹

Canadian Journal of Urology, Vol.13, No.4, pp. 3204-3207, 2006

Abstract Renal lymphangiectasia is a rare renal condition. We present a case of bilateral renal lymphangiectasia in a 52-year-old man who presented with bilateral flank pain and gross hematuria. The clinical features, diagnosis and characteristic imaging findings are reviewed. This condition should be considered in the differential diagnosis of cystic renal masses in both children and adults. More >

Richard D. Sowery, D. Robert Siemens

Canadian Journal of Urology, Vol.11, No.5, pp. 2407-2410, 2004

Abstract Objective: To characterize tumor growth of patients managed conservatively for renal cell carcinoma.
Methods: Patients electing conservative management of radiographically determined renal cell carcinomas were referred to a surveillance database. Exclusion criteria consisted of locally advanced disease (>T2) and those with metastatic disease. Clinical follow-up included renal imaging with ultrasound or computed tomography at least every 6 months.
Results: Twenty-two patients were originally managed conservatively, two of whom subsequently underwent nephrectomy because of rapid tumor growth. Mean follow-up was 26 months. Mean tumor volume and diameter at presentation was 62.4 cc and 4.08 cm respectively. Overall tumor growth More >

A. Tsourkas, R. Weissleder^1,1

Molecular & Cellular Biomechanics, Vol.1, No.2, pp. 133-146, 2004, DOI:10.3970/mcb.2004.001.133

Abstract Traditionally, fluorescent and luminescent reporter proteins have been used as indicators of gene expression and protein localization. However, insightful mutagenesis and protein engineering strategies have transformed these simple passive reporters into active biological sensors. Molecular reporters are now being designed to alter their intrinsic optical properties in response to specific biomolecular interactions. Applications for these novel biological sensors range from monitoring intracellular pH and ion fluxes to detecting protein-protein interactions and enzymatic activity. The ability to monitor the dynamics of intracellular activity in response to external stimuli can help elucidate the cascade of events involved More >