Richard Boyes

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We present a complete, end-to-end computer-aided detection (CAD) system for identifying lesions in the colon, imaged with computed tomography (CT). This system includes facilities for colon segmentation, candidate generation, feature analysis, and classification. The algorithms have been designed to offer robust performance to variation in image data and(More)
One of the recent innovations in computer engineering has been the development of multicore processors, which are composed of two or more independent cores in a single physical package. Today, many processors, including digital signal processors (DSPs), mobile, graphics, and general-purpose central processing units (CPUs) have a multicore design, driven by(More)
A patient is presented in whom pulmonary artery catheter insertion fortutiously demonstrated persistent left superior vena cava on two separate occasions. Further studies with venogram and a first pass nuclear scan demonstrated total absence of the right superior vena cava. Although this anomaly is commonly associated with intracardiac defects and rhythm(More)
Among the most commonly performed nonvascular procedures in hospitalized patients are the placement of nasogastric tubes and nasoenteric feeding tubes. Large-bore nasogastric tubes are commonly used for both diagnostic and therapeutic purposes; small-bore nasoenteric tubes are used primarily for intestinal feeding. The techniques of insertion, methods of(More)
A family of four was exposed to toxic levels of mercury vapor while attempting to extract silver from mercury amalgam. All four suffered respiratory failure and subsequent death despite chelation therapy with dimercaprol. Histologic findings at autopsy were similar in all four cases demonstrating a progression of acute lung injury that appeared related to(More)
A syndrome heralded by fever, deterioration of graft function, respiratory failure accompanied by pulmonary infiltrates has been termed "transplant lung." We hemodynamically studied eight such patients. At the height of their illness, pulmonary artery wedge pressure (PAWP) was elevated to 19.3 +/- 2.6 mm Hg along with mean pulmonary artery pressure (PAP) of(More)
This paper presents a novel method to approximate shift-variant Gaussian filtering of an image using a set of shift-invariant Gaussian filters. This approximation affords filtering of the image using fast convolution techniques that rely on the FFT, while achieving a result that closely matches the shift-variant result. We demonstrate the method in a CT(More)
This paper presents a novel method to approximate shiftvariant Gaussian filtering of an image using a set of shiftinvariant Gaussian filters. This approximation affords filtering of the image using fast convolution techniques that rely on the FFT, while achieving a result that closely matches the shift-variant result. We demonstrate the method in a CT(More)
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