Radiation doses and image information in digital pelvimetry with a phosphorous screen.
OBJECTIVE
The aim of the investigation was to determine the patient dose in digital pelvimetry by means of a phosphorous screen as compared to a screen-film combination of very high sensitivity.


METHODS
Entrance dose measurements and absorbed dose determinations in a series of patient exposures were made. In the first series the exposure reduction was achieved by reducing the mAs (tube current x exposure time) for the lateral and the a.p. views as compared with those used for the screen-film system. In the second series the tube potential, kV, was increased for both projections in order to increase the penetration capacity of the radiation.


CONCLUSIONS
The imaging plate technique can be used in pelvimetry with a dose reduction (and a corresponding reduction of the radiation risk to the foetus) to less than 50% of that achieved with a screen-film system of the very highest sensitivity.
Holje
G
G
Department of Radiophysics, University Hospital, Lund, Sweden.
Jarlman
O
O
Samuelsson
L
L
D005260:Female; D006801:Humans; D008768:Methylmethacrylates; D010387:Pelvimetry / Q000295:instrumentation* / Q000706:statistics & numerical data; D010388:Pelvis / Q000000981:diagnostic imaging*; D019047:Phantoms, Imaging; D011247:Pregnancy; D011829:Radiation Dosage; D011856:Radiographic Image Enhancement / Q000295:instrumentation; D012680:Sensitivity and Specificity; D014963:X-Ray Intensifying Screens / Q000706:statistics & numerical data
D008768:Methylmethacrylates