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Computer-Assisted Instruction definition: A self-learning technique, usually online, involving interaction of the student with programmed instructional materials.
computer assisted instruction definition: self-learning technique, usually online, involving interaction of the student with programmed instructional materials; computer program or software utilized in the education process.
Computer Simulation definition: Computer-based representation of physical systems and phenomena such as chemical processes.
computer simulation definition: the use of computers to perform structural, mathematical or molecular modeling or to simulate real life activities.
Computer Modeling definition: A technique which attempts to provide an abstract model of a particular system. It utilizes a mathematical model, which attempts to predict the behavior of the system from a set of parameters and initial conditions.
Tomography, Emission-Computed definition: Tomography using radioactive emissions from injected RADIONUCLIDES and computer ALGORITHMS to reconstruct an image.
radionuclide emission tomography definition: tomography using emissions from radionuclides and a computer algorithm to reconstruct the image.
Tomography, X-Ray Computed definition: Tomography using x-ray transmission and a computer algorithm to reconstruct the image.
computed axial tomography definition: radiography in which a three dimensional image of a body structure is constructed by computer from a series of plane cross sectional images made along an axis.
tomography definition: A series of detailed pictures of areas inside the body; the pictures are created by a computer linked to an x-ray machine.
Computed Tomography definition: A method of examining body organs by scanning them with X rays and using a computer to construct a series of cross-sectional scans along a single axis.
Computed axial tomography definition: Computed axial tomography
Medical Records Systems, Computerized definition: Computer-based systems for input, storage, display, retrieval, and printing of information contained in a patient's medical record.
automated medical record system definition: computer based systems for input, storage, display, retrieval, and printing of information contained in a patient's medical record.
SYSTEM, ISOKINETIC TESTING AND EVALUATION definition: An isokinetic testing and evaluation system is a rehabilitative exercise device intended for medical purposes, such as to measure, evaluate, and increase the strength of muscles and the range of motion of joints.
Dynamometer Exercise Systems, Computerized definition: Exercisers designed to guide, measure, and assess the performance of all major muscle groups in four kinds of muscle activity: passive (movement without exertion), isometric (exertion without movement), isokinetic (variable exertion at a constant rate of movement), and isotonic (constant exertion at a variable rate of movement). These exercisers include an exercise station that provides some form of resistance (e.g., hydraulic, electric, weights) to the muscular force applied for the patient and a computerized unit that controls the sequence and duration of the exercise plan and monitors and assesses the patient's performance and progress. Computerized dynamometric exercisers are used for exercise and physical rehabilitation of weakened or injured muscles and for the assessment of muscle and or joint (e.g., knee, shoulder) performance.
Analyzers, Physiologic, Somnography definition: Physiologic analyzers that simultaneously measure, record, and interpret a variety of physiologic functions during sleep. These analyzers typically perform evaluations of electroencephalography, electrocardiography, electro-oculography, electromyography, respiration, temperature, and pulse oximetry readings; usually, they also provide audiovisual information about the sleeping patient for behavioral analysis. Some analyzers also perform additional evaluations according to the study needs, such as gastroesophageal reflux, bedwetting (enuresis), or penile tumescence. Somnography analyzers consist of electrodes and instruments that measure physiologic activities; a headbox that includes samplers, filters, and amplifiers; and appropriate software for processing and patient reporting. These analyzers are used in the diagnostic evaluation of sleep and sleep-related disorders, such as difficulty falling asleep (insomnia), difficulty staying awake (hypersomnia), apnea, and other sleep disorders associated with medical or psychiatric conditions.
Stereotactic Systems definition: Systems that combine diagnostic images, (e.g., MRI, CT) with adequate means for precise localization of probes or other devices during open or percutaneous procedures. These systems may include a high-performance graphic computer, a 3-dimensional digitizer, and interactive software.
spiral CT scan definition: A detailed picture of areas inside the body. The pictures are created by a computer linked to an x-ray machine that scans the body in a spiral path.
Tomography, Spiral Computed definition: Computed tomography where there is continuous X-ray exposure to the patient while being transported in a spiral or helical pattern through the beam of irradiation. This provides improved three-dimensional contrast and spatial resolution compared to conventional computed tomography, where data is obtained and computed from individual sequential exposures.
Spiral CT definition: A method of computed tomography (CT) that uses continuous rotation of the X-ray tube and continuous transport of the patient through the scanning aperture that allows the rapid acquisition of a volume of CT data. Advantages over conventional CT include: rapid acquisition of a large volume of data within a single breath-hold, thus minimizing respiration artifact and misregistration between slices; the ability to reconstruct images retrospectively at any level within the scanned volume; optimization of intravenous contrast enhancement due to the short scan times; improved multi-planar and 3-D reconstruction; and the potential for radiation dose reduction. Same as helical computed tomography. (British Journal of Radiology 1994 May;67(797):436-44)
Tomography Scanners, X-Ray Computed definition: X-ray image-detecting devices that make a focused image of body structures lying in a predetermined plane from which more complex images are computed.
SYSTEM, X-RAY, TOMOGRAPHY, COMPUTED definition: A computed tomography X-ray system is a diagnostic X-ray system intended to produce cross-sectional images of the body by computer reconstruction of X-ray transmission data from the same axial plane taken at different angles. This generic type of device may include signal analysis and display equipment, patient and equipment supports, component parts, and accessories.
CT Scanner definition: CT (Computerized (Axial) Tomography) scanner is a special kind of machine which directs a series of X-ray pulses through the body, to produce detailed pictures of internal body structures.
Scanning Systems, Computed Tomography definition: Scanning systems that use a radiographic technique and computerized processing to generate thin cross-sectional (tomographic) images, or "slices" of a transverse plane of the body. Most computed tomography (CT) scanning systems are capable of three-dimensional (3-D) image reconstruction. During a scan, the x-ray beam is moved across the patient so that the x-ray attenuations along many lines in the tissue slice can be determined and stored in a computer. A CT scanning system consists of an x-ray subsystem (i.e., x-ray generator, x-ray tube, gantry); a computer subsystem, including software for image processing, display monitors, and a data storage unit; and an operator console. The set of tomographic images of the human body reconstructed by the computer are used for a wide variety of medical procedures and examinations.
Cabinets, Storage, Key, Computerized definition: Key storage cabinets that include a computerized unit to automatically keep track of users and the time of every transaction involving stored keys. These computerized systems include a set of safety features to facilitate orderly control of asset usage and access (e.g., vehicles, restricted areas); some systems include mechanisms to render the cabinet unusable for unauthorized users. Computer-controlled key storage cabinets frequently maintain a database that allows either display or printing of data logs with information such as the name of the current user, the history of previous users, and both withdrawal and return time for each transaction.
Cabinets, Storage, Catheter, Computerized definition: Catheter storage cabinets that include a computerized unit to automatically keep track of users and the time of every transaction. These computerized systems include a set of safety features to facilitate orderly control of catheter use and cabinet access; some systems include mechanisms to render the cabinet unusable for unauthorized users. Computer-controlled catheter storage cabinets maintain a database that allows either the display or printing of data logs with information related to catheterization laboratory activities, such as the name of the current user, the history of each catheter use, both withdrawal and return time for each transaction, and costs. Computerized catheter storage cabinets may provide data to hospital information systems and a continuous inventory of catheters.
Cabinets, Storage, Medicine, Computerized definition: Medicine storage cabinets that include computerized capabilities to automatically keep track of users and the time of every transaction; some cabinets include mechanisms to render the cabinet unusable for unauthorized users. Computer-controlled medicine storage cabinets frequently maintain a database that allows either the display or printing of data logs with information such as the name of the current user, the history of previous users, and both withdrawal and return time for each transaction. These cabinets may provide data to hospital information systems and/or be used as a component of medication-dispensing automated systems designed to provide safe and orderly control of medicine dispensing throughout a healthcare facility (i.e., decentralized medication management systems).
Computerized Thermal Imaging definition: A non-invasive imaging method that uses a thermal sensitive camera to capture a digital image based on heat radiating from the body. In trials for detection of breast cancer, computer-assisted interpretation of the digital image helps to determine whether a local abnormality in breast tissue temperature is present, which may indicate the presence of disease.
Scanning Systems, Computed Tomography, Axial definition: Computed tomography (CT) scanning systems in which the table moves the patient into the gantry and the x-ray tube rotates around the patient in such a way that each revolution produces one slice. Axial CT scanners are classified according to the geometry of the x-ray tube detector system in generations (e.g., first, second). Typical scanning time for each slice is on the order of a few seconds. These systems are mostly used for diagnostic and examination purposes, including the diagnosis of injuries, lesions, and malignancies.
Cone-Beam Computed Tomography definition: Computed tomography modalities which use a cone or pyramid-shaped beam of radiation.
Keypads, Computer/Computerized System definition: Keypads designed for the entry of data in a computer, workstation, or other computerized equipment. These keypads typically consist of a mechanical and/or electromechanical grid of keys arranged for efficient data entry that may include alphabetic, numeric, alphanumeric, symbol, and/or function keys. A variety of keypads are available according to the intended use; applications of specific keypads include data input for computers, workstations, and computerized systems, often as an integral component of computers (e.g., laptop computers) and other computerized systems. Dedicated computer keypads are available for remote-control applications.