James Perumpillichira

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BACKGROUND Virtual colonoscopy has been evaluated for use as a colorectal cancer screening tool, and in prior studies, it has been estimated that the evaluation of extra-colonic findings adds $28-$34 per patient studied. METHODS As an ancillary study to a prospective cohort study comparing virtual colonoscopy to conventional colonoscopy for colorectal(More)
PURPOSE To prospectively compare the homogeneity, adequacy, and patient acceptance of nonionic iodine-based regimens with those of a barium-based regimen for computed tomographic (CT) colonography with electronic subtraction cleansing. MATERIALS AND METHODS After institutional review board approval and informed consent were obtained, 68 subjects (41 men(More)
The authors evaluated a computed tomography (CT) colonographic technique with a combination of preexamination orally ingested positive contrast material and postacquisition image processing to subtract out the ingested opacified bowel contents. With this technique, rigorous physical purging of the bowel was not necessary before structural examination of the(More)
We describe a method to perform postacquisition processing of computed tomography colonography (virtual colonoscopy) datasets that results in electronic removal of opacified, ingested bowel contents while reconstructing natural appearing boundaries of colon lumen and thereby permitting three-dimensional visual analyses of the resulting colon models.
PURPOSE To determine the effect of antibiotic prophylaxis on the postprocedural infection rate after fluoroscopically guided percutaneous radiologic gastrostomy and gastrojejunostomy with gastropexy performed as an outpatient procedure in ambulatory patients with head and neck cancer. MATERIALS AND METHODS Medical and imaging records of all outpatients(More)
Colon cancer is one of the leading causes of cancer deaths in the developed countries. Most colon cancers can be prevented if precursor colon polyps are detected and removed. Virtual colonoscopy, or CT colonography, has shown promise to be the future screening tool for polyp detection, with a number of studies performed at academic institutions showing high(More)
BACKGROUND CT colonography (CTC) is utilized as a diagnostic tool in the detection of colon polyps and early colorectal cancer in adults. Large studies in the literature, although focused on adult populations, have shown CTC to be a safe, accurate, non-invasive technique. OBJECTIVE We evaluated the technical feasibility of CTC in children using a low-dose(More)
Enhanced z-axis coverage with thin overlapping slices in breath-hold acquisitions with multidetector CT (MDCT) has considerably enhanced the quality of multiplanar 3D reconstruction. This pictorial essay describes the improvements in 3D reconstruction and technical aspects of 3D reconstruction and rendering techniques available for abdominal imaging.(More)
PURPOSE To evaluate the effect of various bowel contrast material concentrations and subtraction software on size measurements of well-defined polyp lesions in a colon phantom at CT colonography. MATERIALS AND METHODS Repeated scanning and a precise reference standard required the use of a colon phantom in which 21 polyps were randomly distributed. Two(More)
PURPOSE To analyze the CT and MR imaging features of circumportal pancreas (CP) with emphasis on the relative frequency of variants of parenchymal fusion, ductal anatomy, and vascular anatomy. METHODS A retrospective review of CT and MR imaging findings of 40 patients with CP was performed. CT and MR images were reviewed by two radiologists in consensus.(More)