Answer:    A.   (Less than 1.5 rad) 

Note that fetal exposures >50 mGy (5 rad) should be avoided. 

Example fetal doses from 16s MDCT:

• CTPA = 0.6 mGy  
• CT Renal Stone = 12 mGy  
• Appendix = 40 mGy 

Note: Multidetector CT may deliver a dose 2-8x greater than single-slice CT.  However, when comparing MDCT equipment, dose decreases with increasing number of detectors