Reducing the oral contrast dose in CT colonography: evaluation of faecal tagging quality and patient acceptance.

CT colonography with rectal iodinated fluid tagging: tagging quality, patient acceptance and examination time compared with oral fluid tagging

A New Algorithm of Electronic Cleansing for Weak Faecal-Tagging CT Colonography

CT Colonography (CTC) has emerged as a mainstream clinical practice of colonic cancer screening and diagnosis. One of the most critical problems is to increase compliance with CTC examinations via minimal bowel preparation (i.e., weak faecal-tagging), which nevertheless causes much lower signal-noise-ratio than conventional preparation. In this paper, we present a new algorithm pipeline of elec...

Evaluation of Factors Affecting Absorbed Dose, Optimization Methods and Patient Dose Reduction in Dental Cone Beam CT (CBCT)

Introduction: Nowadays the use of cone beam computed tomography in dental imaging is increasing, although this method has a much lower dose than conventional CT scans, it delivers a higher dose than the panoramic and periapical patients therefore, , the aim of this study was to investigate the factors affecting the patients' dose in dental CBCTs and methods of optimizing and reducing the patien...

High contrast to noise ratio (CNR) using CO2 for colonic distension in 3.0 Tesla Magnetic Resonance Colonography (MRC)

Purpose / introduction Magnetic Resonance Colonography (MRC) is studied as screening technique for colorectal cancer. The lack of ionizing radiation and the superior contrast resolution over computed tomography (CT) make MRC a valuable alternative to CT-colonography [1]. At present the optimal scan parameters and bowel preparation, aimed at high image quality and minimized patient burden, are n...

Dietary fecal tagging as a cleansing method before CT colonography: initial results polyp detection and patient acceptance.

PURPOSE To compare reduced colonic cleansing based on dietary fecal tagging (FT) with standard (non-FT) colonic cleansing with regard to patient acceptance, sensitivity, and specificity. MATERIALS AND METHODS In 50 patients (FT group), FT was performed by means of diet, magnesium citrate, and a barium suspension. In another 50 patients (non-FT group), preparation was based on polyethylene gly...