Conference Paper

Radiographic Equipment and Components: Technology Overview and Quality Improvement

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... As a first approximation, beam quantity for single phase generators should be 4 ± 0.8 mR/mAs @ 80 kVp @ 100 cm SID with approximately 2.5 mm Al total filtration. 22 The specification does not apply to capacitor discharge units (see section 8.2.3). Beam quantity for all other types of generators (limited amount of voltage ripple) should be approximately 6 ± 1 mR/mAs @ 80 kVp @ 100 cm SID with approximately 2.5 mm Al total filtration. ...
... Beam quantity for all other types of generators (limited amount of voltage ripple) should be approximately 6 ± 1 mR/mAs @ 80 kVp @ 100 cm SID with approximately 2.5 mm Al total filtration. 22 ...
... As a first approximation, beam quantity for single phase generators should be 4 ± 0.8 mR/mAs @ 80 kVp @ 100 cm SID with approximately 2.5 mm Al total filtration. 22 The specification does not apply to capacitor discharge units (see section 8.2.3). Beam quantity for all other types of generators (limited amount of voltage ripple) should be approximately 6 ± 1 mR/mAs @ 80 kVp @ 100 cm SID with approximately 2.5 mm Al total filtration. ...
... Beam quantity for all other types of generators (limited amount of voltage ripple) should be approximately 6 ± 1 mR/mAs @ 80 kVp @ 100 cm SID with approximately 2.5 mm Al total filtration. 22 ...
Article
Conventional diagnostic X-ray units are used for radiographic imaging in several countries. As a part of our quality control procedures, we recorded entrance surface air kerma, tube voltage, and half-value layer measurements for four diagnostic X-ray tubes over a 108 week course. The entrance surface air kerma for one of the X-ray tubes suddenly declined in the 107th week, and the filament burned out 1 week later. We retrospectively reviewed these data and observed that the entrance surface air kerma of the failing tube had increased as a function of elapsed time. The slopes for these four X-ray units were calculated, and we observed that the slope of the failing tube was higher than that of the other three tubes (P < 0.001). Monitoring of the fluctuation in the entrance surface air kerma would be valuable for predicting the residual life expectancy of X-ray tubes.
... [69] After installation of the equipment and completion of agreed upon pediatric modifications/configurations of the unit, a qualified medical physicist should perform extensive functional testing of the imaging device to verify that all technical imaging parameters that affect patient dose are performing in an acceptable manner prior to first clinical use. [70][71][72][73][74][75] These activities address the left side of Fig. 8. Clinical staff in addition to the operator may be involved in ensuring the proper operation of the imaging equipment, right hand side of Fig. 8. [2,76] First, the clinical need and justification of the imaging study involving ionizing radiation should be evaluated. Will the results of the study realistically answer the original clinical question? ...
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