Colonography, Computed Tomographic
A non-invasive imaging method that uses computed tomographic data combined with specialized imaging software to examine the colon.
Colonic Polyps
Colonoscopy
Endoscopic examination, therapy or surgery of the luminal surface of the colon.
Diatrizoate Meglumine
A versatile contrast medium used for DIAGNOSTIC X-RAY RADIOLOGY.
Laxatives
Enema
A solution or compound that is introduced into the RECTUM with the purpose of cleansing the COLON or for diagnostic procedures.
Radiographic Image Interpretation, Computer-Assisted
Colorectal Neoplasms
Tumors or cancer of the COLON or the RECTUM or both. Risk factors for colorectal cancer include chronic ULCERATIVE COLITIS; FAMILIAL POLYPOSIS COLI; exposure to ASBESTOS; and irradiation of the CERVIX UTERI.
Tomography, X-Ray Computed
Insufflation
Iothalamate Meglumine
Sensitivity and Specificity
Barium Sulfate
Radiographic Image Enhancement
Imaging, Three-Dimensional
The process of generating three-dimensional images by electronic, photographic, or other methods. For example, three-dimensional images can be generated by assembling multiple tomographic images with the aid of a computer, while photographic 3-D images (HOLOGRAPHY) can be made by exposing film to the interference pattern created when two laser light sources shine on an object.
Tomography Scanners, X-Ray Computed
Mass Screening
Colonic Diseases
Pathological processes in the COLON region of the large intestine (INTESTINE, LARGE).
Tomography
Reproducibility of Results
The statistical reproducibility of measurements (often in a clinical context), including the testing of instrumentation or techniques to obtain reproducible results. The concept includes reproducibility of physiological measurements, which may be used to develop rules to assess probability or prognosis, or response to a stimulus; reproducibility of occurrence of a condition; and reproducibility of experimental results.
Colon
Radiology
Image Processing, Computer-Assisted
False Positive Reactions
Tomography, Optical
Projection of near-IR light (INFRARED RAYS), in the 700-1000 nm region, across an object in parallel beams to an array of sensitive photodetectors. This is repeated at various angles and a mathematical reconstruction provides three dimensional MEDICAL IMAGING of tissues. Based on the relative transparency of tissues to this spectra, it has been used to monitor local oxygenation, brain and joints.
Pattern Recognition, Automated
Iohexol
Early Detection of Cancer
Incidental Findings
Unanticipated information discovered in the course of testing or medical care. Used in discussions of information that may have social or psychological consequences, such as when it is learned that a child's biological father is someone other than the putative father, or that a person tested for one disease or disorder has, or is at risk for, something else.
Polyps
Discrete abnormal tissue masses that protrude into the lumen of the DIGESTIVE TRACT or the RESPIRATORY TRACT. Polyps can be spheroidal, hemispheroidal, or irregular mound-shaped structures attached to the MUCOUS MEMBRANE of the lumen wall either by a stalk, pedunculus, or by a broad base.
Feasibility Studies
Diagnosis, Computer-Assisted
Wisconsin
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Patient Preference
Cost-Benefit Analysis
A method of comparing the cost of a program with its expected benefits in dollars (or other currency). The benefit-to-cost ratio is a measure of total return expected per unit of money spent. This analysis generally excludes consideration of factors that are not measured ultimately in economic terms. Cost effectiveness compares alternative ways to achieve a specific set of results.
Algorithms
Tomography, Emission-Computed
Tomography using radioactive emissions from injected RADIONUCLIDES and computer ALGORITHMS to reconstruct an image.
Cone-Beam Computed Tomography
Computed tomography modalities which use a cone or pyramid-shaped beam of radiation.
Infarction
Prospective Studies
Observer Variation
The failure by the observer to measure or identify a phenomenon accurately, which results in an error. Sources for this may be due to the observer's missing an abnormality, or to faulty technique resulting in incorrect test measurement, or to misinterpretation of the data. Two varieties are inter-observer variation (the amount observers vary from one another when reporting on the same material) and intra-observer variation (the amount one observer varies between observations when reporting more than once on the same material).