CT dosimetry phantom definition

CT dosimetry phantom means the phantom used for determination of the dose delivered by a CT x-ray system. The phantom shall be a right circular cylinder of polymethl-methacrylate of density 1.19±0.01 grams per cubic centi- meter. The phantom shall be at least 14 centimeters in length and shall have diameters of 32.0 centimeters for test- ing any CT system designed to image any section of the body (whole body scanners) and 16.0 centimeters for any system designed to image the head (head scanners) or for any whole body scanner operated in the head scanning mode. The phantom shall provide Food and Drug Administration, HHS § 1020.33 means for the placement of a dosim- eter(s) along its axis of rotation and along a line parallel to the axis of rota- tion 1.0 centimeter from the outer sur- face and within the phantom. Means for the placement of a dosimeter(s) or alignment device at other locations may be provided for convenience. The means used for placement of a dosim- eter(s) (i.e., hole size) and the type of dosimeter(s) used is at the discretion of the manufacturer. Any effect on the doses measured due to the removal of phantom material to accommodate dosimeters shall be accounted for through appropriate corrections to the reported data or included in the state- ment of maximum deviation for the values obtained using the phantom.
CT dosimetry phantom means the phantom used for determination of the dose delivered by a CT x-ray system. The phantom must be a right circular cylinder of polymethyl-methacrylate of density 1.19±0.01 grams per cubic centimeter. Except for pediatric dose measurements, the phantom must be at least 14 centimeters in length and must have diameters of 32.0 centimeters for testing any CT system designed to image any section of the body (whole body scanners) and 16.0 centimeters for any system designed to image the head (head scanners) or for any whole body scanner operated in the head scanning mode. The phantom must provide means for the placement of a dosimeter along its axis of rotation and along a line parallel to the axis of rotation 1.0 centimeter from the outer surface and within the phantom.
CT dosimetry phantom means an object used to determine the dose delivered by a CT X-ray system.

Examples of CT dosimetry phantom in a sentence

  • The angular position where the maximum surface CTDI occurs shall be identified to allow for reproducible positioning of a CT dosimetry phantom.

  • All dose measurements shall be performed with the CT dosimetry phantom placed on the patient couch or support device without additional attenuation materials present.

  • The spot-check procedures shall incorporate the use of a CT dosimetry phantom which has a capability of providing an indication of contrast scale, noise, nominal tomographic section thickness, the resolution capability of the system for low and high contrast objects, and measuring the mean CTN for water or other reference material.

  • The following dose information obtained by using the CT dosimetry phantom.

  • The dose profile along the center axis of the CT dosimetry phantom for the minimum, maximum, and midrange values of the nominal tomographic section thickness used by the registrant shall be measurable.

  • The CT dosimetry phantom shall be oriented so that the measurement point 1.0 centimeter from the outer surface and within the phantom is in the same angular position within the gantry as the point of maximum surface CTDI identified.

  • Calibration shall meet the following requirements: The dose profile along the center axis of the CT dosimetry phantom for the minimum, maximum, and midrange values of the nominal tomographic section thickness used by the registrant shall be measurable.

  • Calibration shall meet the following requirements: The dose profile along the center axis of the CT dosimetry phantom for the minimum, maximum, and midrange values of the nominal tomo- graphic section thickness used by the registrant shall be measurable.

  • The CT dosimetry phantom shall be oriented so that the measurement point 1.0 centimeter from the outer surface and within the phantom is in the same angular position within the gantry at the point of maximum surface exposure identified.

  • The phantoms shall meet the definition for a CT dosimetry phantom under 21 CFR 1020.33(b)(6) (relating to computed tomography (CT) equipment).


More Definitions of CT dosimetry phantom

CT dosimetry phantom means the phantom used for determination of the dose delivered by a CT x-ray system. The phantom shall be a right circular cylinder of polymethl-methacrylate of density 1.19±0.01 grams per cubic centimeter. The phantom shall be at least 14 centimeters in length and shall have diameters of 32.0 centimeters for testing any CT system designed to image any section of the body (whole body scanners) and
CT dosimetry phantom means an object used for determination of the dose delivered by a CT x-ray system.
CT dosimetry phantom means the phantom used for determination of the dose delivered by a CT x-ray system. The phantom shall be a right circular cylinder of polymethl-methacrylate of density 1.19±0.01 grams per cubic centimeter. The phantom shall be at least 14 centimeters in length and shall have diameters of 32.0 centimeters for testing any CT system designed to image any section of the body (whole body scanners) and 16.0 centimeters for any system designed to image the head (head scanners) or for any whole body scanner operated in the head scanning mode. The phantom shall provide means

Related to CT dosimetry phantom

  • Dosimetry processor means an individual or an organization that processes and evaluates individual monitoring devices in order to determine the radiation dose delivered to the monitoring devices.

  • Stationary beam radiation therapy means radiation therapy without displacement of one or more mechanical axes relative to the patient during irradiation.

  • Clinical nurse specialist means a registered nurse with relevant post-basic qualifications and 12 months’ experience working in the clinical area of his/her specified post-basic qualification, or a minimum of four years’ post-basic registration experience, including three years’ experience in the relevant specialist field and who satisfies the local criteria.

  • Synchronous Optical Network (SONET) is an optical interface standard that allows inter-networking of transmission products from multiple vendors. The base rate is 51.84 Mbps (“OC-1/STS-1”) and higher rates are direct multiples of the base rate, up to 13.22 Gbps.

  • Moving beam radiation therapy means radiation therapy with any planned displacement of radiation field or patient relative to each other, or with any planned change of absorbed dose distribution. It includes arc, skip, conformal, intensity modulation and rotational therapy.

  • technical service means an organisation or body designated by the approval authority of a Member State as a testing laboratory to carry out tests, or as a conformity assessment body to carry out the initial assessment and other tests or inspections, on behalf of the approval authority, it being possible for the approval authority itself to carry out those functions;

  • External beam radiation therapy means therapeutic irradiation in which the source of radiation is at a distance from the body.

  • Background radiation means radiation from cosmic sources; naturally occurring radioactive materials, including radon (except as a decay product of source or special nuclear material); and global fallout as it exists in the environment from the testing of nuclear explosive devices or from past nuclear accidents such as Chernobyl that contribute to background radiation and are not under the control of the licensee. “Background radiation” does not include sources of radiation from radioactive materials regulated by the agency.

  • aerodrome control service means air traffic control service for aerodrome traffic;

  • Service Animal means an animal that is required by a person with a disability for assistance and is certified, in writing, as having been trained by a professional service animal institution to assist a person with a disability and which is properly harnessed in accordance with standards established by a professional service animal institution.

  • Source-image receptor distance means the distance from the source to the center of the input surface of the image receptor.

  • Biological safety cabinet means a containment unit suitable for the preparation of low to moderate risk agents where there is a need for protection of the product, personnel, and environment, according to National Sanitation Foundation (NSF) Standard 49.

  • Analytical x-ray system means a group of components utilizing x-rays to determine the elemental composition or to examine the microstructure of materials.

  • Pre-Licensed Therapist means an individual who has obtained a Master’s Degree in Social Work or Marriage and Family Therapy and is registered with the BBS as an Associate CSW or MFT Intern acquiring hours for licensing. An individual’s registration is subject to regulations adopted by the BBS.

  • Autism spectrum disorders means any of the pervasive developmental disorders as defined by the Diagnostic and Statistical Manual of Mental Disorders, 4th edition, published by the American Psychiatric Association, including autistic disorder, Asperger's disorder and pervasive developmental disorder not otherwise specified.[PL 2011, c. 420, Pt. A, §26 (RAL).]

  • Continuous parameter monitoring system (CPMS means all of the equipment necessary to meet the data acquisition and availability requirements of the Prevention of Significant Deterioration program, to monitor process and control device operational parameters (for example, control device secondary voltages and electric currents) and other information (for example, gas flow rate, O2 or CO2 concentrations), and to record average operational parameter value(s) on a continuous basis.

  • Diagnostic Service means an examination or procedure performed to obtain information regarding the medical condition of an outpatient.