The system enables the delivery of individual layers of pencil beam spots to precise locations, eliminating the need for beam collimation
and compensators to adjust the target area.
The dark room processing faults are also completely eliminated, thus leaving out beam collimation and good technique as the major potential sources of patient's over exposure (6).
The evaluation was based on x-ray beam collimation observed on radiographs stored in the film library of the hospitals, questionnaires administered to radiographers and light beam misalignment test conducted on the x-ray machines.
Should the procedure be prolonged unexpectedly, the radiologist should consider enlarging the X-ray field size or altering the X-ray beam collimation
Pitch is the distance the table travels per rotation divided by the beam collimation
Explain the importance of beam collimation and filtration in patient protection.
Proper beam collimation reduces scatter, thereby improving image contrast and effectively reducing patient dose by minimizing unnecessary irradiation of nearby organs outside the area of interest.
Mechanical or optical x-ray beam collimation
in conjunction with video camera alignment allows confirmation of specific analysis areas/ features.
Features include mechanical or optical x-ray beam collimation
, gas proportional counter or semiconductor x-ray detector, and dual-encoded stage driver options.
At the heart of the system is the new ARIS(TM) Ion Source, which provides exceptional ion beam collimation
necessary for within wafer uniformity.
A strip of lead placed on top of the crib at the edge of the inferior border of the x-ray beam collimation
We have also routinely generated laser-to-X-ray conversion efficiencies in the 3 percent to 6 percent range (depending upon the laser light wavelength) and, with the demonstrated improvements in X-ray beam collimation
technology, we have increased the X-ray power incident on the mask/wafer lithography target 20 to 40 times over this two-year period.