Detection and Segmentation of Colonic Polyps on Implicit Isosurfaces by Second Principal Curvature Flow

Today’s computer aided detection systems for computed tomography colonography (CTC) enable automated detection and segmentation of colorectal polyps.We present a paradigm shift by proposing a method that measures the amount of protrudedness of a candidate object in a scale adaptive fashion. One of the main results is that the performance of the...

Automated Detection and Segmentation of Large Lesions in CT Colonography

Computerized tomographic colonography is a minimally invasive technique for the detection of colorectal polyps and carcinoma. Computer-aided diagnosis (CAD) schemes are designed to help radiologists locating colorectal lesions in an efficient and accurate manner. Large lesions are often initially detected as multiple small objects, due to which...

Computer-Aided Detection of Polyps in CT Colonography Using Logistic Regression

We present a computer-aided detection (CAD) system for computed tomography colonography that orders the polyps according to clinical relevance. TheCADsystem consists of two steps: candidate detection and supervised classification. The characteristics of the detection step lead to specific choices for the classification system. The candidates are...

Constrained Registration of the Wrist Joint

Comparing wrist shapes of different individuals requires alignment of these wrists into the same pose. Unconstrained registration of the carpal bones results in anatomically nonfeasible wrists. In this paper, we propose to constrain the registration using the shapes of adjacent bones, by keeping the width of the gap between adjacent bones...

Classifying CT Image Data Into Material Fractions by a Scale and Rotation Invariant Edge Model

A fully automated method is presented to classify 3-D CT data into material fractions. An analytical scale-invariant description relating the data value to derivatives around Gaussian blurred step edges—arch model—is applied to uniquely combine robustness to noise, global signal fluctuations, anisotropic scale, noncubic voxels, and ease of use...

Post-buckled precompressed elements: A new class of control actuators for morphing wing UAVs

A comparison of primary two- and three-dimensional methods to review CT colonography

Real-time, adaptive measurement of corneal shapes

Tomorrow's offices through today's eyes: effects of innovation in the working environment

Many organisations have changed to new ways of working, steered or followed up by design interventions and sharing of activity related workplaces. Expectations have been high. Innovative offices should lead to more efficient use of space and other facilities; greater job satisfaction; the projection of a positive image to clients; an improved...

Werkplekinnovatie: Lusten, lasten, lessen

Werkplekinnovatie is een hot item in het onderzoek van Bouwmanagement & Vastgoedbeheer van de TU Delft. Samen met de Rijksgebouwendienst, ABN AMRO bank en andere betrokkenen wordt onderzocht of de hooggespannen verwachtingen worden waargemaakt. Is flexibel werken in een transparante werkomgeving echt effectiever en efficiënter dan in een...

Het kantoor van morgen vandaag bezien: Effecten van werkplek innovatie

De laatste jaren zijn veel organisaties overgestapt op flexibel werken in een innovatieve kantooromgeving. De verwachtingen zijn hooggespannen. Werkplekinnovatie moet niet alleen leiden tot effectiever werken en efficiënter gebruik van ruimte en andere faciliteiten, maar ook tot meer plezier in het werk, aantrekken en vasthouden van schaars...

Flexibel werken in Dynamischkantoor Haarlem

Dynamischkantoor Haarlem biedt onderdak aan zes VROM-diensten. Een dienst van het Ministerie van LNV is er te gast. Op initiatief van de Rijksgebouwendienst is een innovatief kantoorconcept toegepast: een combikantoor met flexibele, activiteitgerelateerde werkplekken en een centraal archief met trolleys voor persoonlijke archieven. Een klein...

Computer assisted structural concrete education

Computer Simulation of the E.C.C.S. Buckling Curve using a Monte-Carlo Method

The application of a Monte-Carlo simulation procedure to obtain the distribution function of the maximum load of a hinged column with imperfections is discussed. Buckling tests carried out by the E.C.C.S. on IPE 160 sections have been simulated. Information concerning the column variables is obtained from the data-sheets of the E.C.C.S. tests....