Sentence examples for focal spots is from inspiring English sources
The overlapping area between the two focal spots is then deactivated leading to a smaller net excitation area.
(i) When more than one focal spot is provided, the system shall indicate, prior to exposure, which focal spot is selected.
The simulation results indicate that the focal spot is beyond the diffraction limit.
The remaining heat flux by the edge of focal spot is directed by the secondary mirror for electric generation.
Once a nominal focal spot is achieved, the magnet strengths are deliberately de-tuned to simulate the effect of an off-momentum slice of the beam.
The design is such that the anode and the heel effect are reversed and the projected focal spot is smallest at the chest wall.
The size of the focal spot is primarily determined by geometrical demagnification of the source and by figure errors in the mirror shape.
Measured parameters (operating frequency is 40±1 kHz, focal distance is 308 mm, size of focal spot is 16.3 mm, and pressure in focus is about 150 dB) are in good agreement with calculated data.
This paper also presents a homogeneous focusing system by use of a Fresnel lens, in which the incident beam size is 40 × 40 mm2, the focal length is 380 mm, and the dimension of the obtained focal spot is 2 × 10 mm2.
When the divergence angle of the incident light is in the range of 12.5 20 mrad and the pitch is 1 mm, the obtained homogeneity in the focal spot is the optimum (about 95.22%).
(iii) When the target material and/or focal spot is selected by a system algorithm that is based on the exposure or on a test exposure, the system shall display, after the exposure, the target material and/or focal spot actually used during the exposure.
