Scatter | 合法醫療器材資訊網

由CEFloydJr著作·1994·被引用8次—Thegriddedcassetteforportableradiographyprovidesscatterreductionwith...gridincorporatedintoaradiographicimagingcassettewereanalyzed.

Rationale and objectives: The scatter-reduction properties of a new infinity-focused grid incorporated into a radiographic imaging cassette were analyzed.

Methods: A polystyrene chest phantom was imaged using the cassette and bedside radiographic procedure. Scatter fractions were measured using a beam-stop technique at several anatomically equivalent locations. The performance of this cassette also was evaluated as a function of the orientation angle.

Results: The gridded cassette provided a decrease in scatter fraction from 61% to 49% in the lung and from 87% to 76% in the mediastinum. To obtain equivalent film density when the grid was used, the exposure was increased by a factor of 3.0. While there was a decrease in scatter clean-up as the film cassette was tilted from the perpendicular, the grid performed well out to an angle of 10 degrees.

Conclusion: The gridd...