Conceptus dose from two state-of-the-art CT scanners.
Two phantoms, constructed from plastic and water and appropriately proportioned to simulate the female pelvis, were used in the evaluation of the dose delivered to a conceptus from two widely used computed tomographic (CT) scanners. Doses were measured along the central axis and surface of each phantom while scanning 25 contiguous 1-cm sections. Ionization chambers were used for data acquisition. Methods for correcting for partial volume effects inside the chambers are examined. Formulas for calculating the dose to the conceptus in a wide variety of possible situations are presented. These data may be used to guide management of pregnant patients who require or have had CT examinations.
L K
LK
Wagner
B R
BR
Archer
O F
OF
Zeck
D005333:Fetus / Q000528:radiation effects*; D006801:Humans; D008961:Models, Structural; D011829:Radiation Dosage; D011860:Radiography, Abdominal; D011874:Radiometry; D014057:Tomography, X-Ray Computed / Q000295:instrumentation*