Focal spot size definition

Focal spot size means the area of the target or anode that is bombarded by electrons from the cathode of the X-ray tube to produce X-rays. The smaller the focal spot, the better the limited spatial resolution of the X-ray system, especially in magnification mammography.
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Examples of Focal spot size in a sentence

  • Focal spot size: pinhole method To determine the focal spot dimensions (f) with a pinhole, a µ30 m gold/platinum alloy pinhole is used.

  • In 2012, the average CDCR population in 2012 was 134,901, based on the population at the mid-point of 2012.Consequently, even if the rate of suicides per 100,000 had remained the same during that five- year period, the frequency or raw number of suicides should have fallen commensurate with the decline in the total population.

  • Constant potential minimum 20 KHz frequency.3. Exposure timer of minimum 0.02 to 2 seconds.4. Focal spot size should not exceed 0.8 X 0.8 mm5.

  • In addition all the equipment should be checked and calibrated specifically for the following: ( a) Collimation alignment check; (b) Focal spot size measurement; (c) Beam quality half layer value HLV assessment; (d) Automatic exposure control(AEC) check; (e) Artefact evaluation; (f) Breast compression deice check; (g) Screen cleanliness check.

  • To achieve a mili- tary victory over the government’s army is considered to be more difficult and more capability-demanding than to achieve a military victory over rebel groups.

  • RADIOGRAPHIC TECHNIQUE: Focal spot size (FSS) SelectionGiven a minimum amount of voluntary/involuntary patient motion, etc., the student will be able to select the appropriate focal spot as to provide for a maximum amount of image clarity (sharpness of detail or definition) in the production of a diagnostically acceptable radiograph(s) with above average achievement*.

  • X-ray transmitter X-ray detector Geometrical charactericsInstrumenta Focal spot size of the Orel-MT depends on current strength.b The values of magnification and voxel size are limited by the precision of its mechanical parts.

  • Focal spot size measured with a photodiode and a scanning knife-edge, in the focal plane.

  • A person shall not be eligible for election/appointment to the management committee unless s/he is a member of the association.

  • X-ray tube assembly Minimum tube voltage: 80 kV Maximum tube voltage: 130 kV Anode heat storage capacity: 3.5 MHU Anode heat storage capacity: equivalent to at least 8 MHU with iterative reconstruction Tube current: equivalent to 420 mA or higher using iterative reconstruction Focal spot size (Small focal spot: 0.8 x 0.4; Large focal spot: 0.8 x 0.7) 3.

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