Computed tomography dose index definition

Computed tomography dose index means the integral from –7T to +7T of the dose profile along a line perpendicular to the tomographic plane divided by the product of the nominal tomographic section thickness and the number of tomograms produced in a single scan, that is:

Computed tomography dose index. (CTDI) means the average absorbed dose, along the z-axis, from a series of contiguous irradiations. It is measured from one axial CT scan (one rotation of the x-ray tube), and is calculated by dividing the integrated absorbed dose by the nominal total beam collimation. The scattering media for CTDI consist of two (16 and 32 cm in diameter) polymethylmethacrylate (PMMA, e.g., acrylic or Lucite) cylinders of 14 cm length. The equation is:

Computed tomography dose index means the integral from

Examples of Computed tomography dose index in a sentence

• Computed tomography dose index" means the integral from -7 T to +7T of the dose profile along a line perpendicular to the tomographic plane divided by the product of the nominal tomographic section thickness and the number of tomograms produced in a single scan, that is: where: z = Position along a line perpendicular to the tomographic plane.

• Computed tomography dose index means the integral from -7T to +7T of the dose profile along a line perpendicular to the tomographic plane divided by the product of the nominal tomographic section thickness and the number of tomograms produced in a single scan, that is: CTDI = 1nT +7T ∫−7T D( z) dz where: z = Position along a line perpendicular to the tomographic plane.

• Computed tomography dose index and dose length product for cone-beam CT: Monte Carlo simulations.

• Computed tomography dose index and dose length product for cone-beam CT: monte carlo simulations of a commercial system.

• Computed tomography dose index" (CTDI) means the integral of the dose profile along a line perpendicular to the tomographic plane divided by the product of the nominal tomographic sec- tion thickness and the number of tomograms produced in a single scan, that is: CTDI = 1  +7TnT -7T D(z)dz where:z This definition assumes that the dose profile is centered around z=0 and that, for a multiple tomo- gram system, the scan increment between adjacent scans is nT.

More Definitions of Computed tomography dose index

Computed tomography dose index or "CTDI" means the integral of the dose profile along a line perpendicular to the tomographic plane divided by the product of the nominal tomographic section thickness and the number of tomograms produced in a single scan.

Computed tomography dose index means the integral from -7T to +7T of the dose profile along a line

Computed tomography dose index means the integral from -7T to +7T of the dose profile along a line perpendicular to the tomographic plane divided by the product of the nominal tomographic section thickness and the number of tomograms produced in a single scan, that is: where: z =Position along a line perpendicular to the tomographic plane; D(z)=Dose at position z;T =Nominal tomographic section thickness;n =Number of tomograms produced in a single scan.This definition assumes that the dose profile is centered around z=0 and that, for a multiple tomogram system, the scan increment between adjacent scans is nT.

Computed tomography dose index. (CTDI) means the average absorbed dose, along the z-axis, from a series of contiguous irradiations. It is measured from one axial CT scan (one rotation of the x-ray tube), and is calculated by dividing the integrated absorbed dose by the nominal total beam collimation. The scattering

Computed tomography dose index or "CTDI" means a standardized measure of radiation dose output of a CT scanner which allows the user to compare radiation output of different CT scanners.

Computed tomography dose index means the integral from -7T to

Computed tomography dose index. (CTDI) means the integral of the dose profile along a line perpendicular to the tomographic plane divided by the product of the nominal tomographic section thickness and the number of tomograms produced in a single scan where the dose profile is centered around z = 0 and for a multiple tomogram system, the scan increment between adjacent scans is nT;