RT Journal Article
SR Electronic
T1 Must radiation dose for CT of the maxilla and mandible be higher than that for conventional panoramic radiography?
JF American Journal of Neuroradiology
JO Am. J. Neuroradiol.
FD American Society of Neuroradiology
SP 1758
OP 1760
VO 17
IS 9
A1 C G Diederichs
A1 W G Engelke
A1 B Richter
A1 K P Hermann
A1 J W Oestmann
YR 1996
UL http://www.ajnr.org/content/17/9/1758.abstract
AB We evaluated the feasibility of performing preoperative spiral CT of the maxilla and mandible with a radiation dose similar to that used for conventional panoramic radiography. The skin entrance doses of radiation used for spiral CT (collimation, 1 mm; pitch, 2; tube voltage, 80 kV; tube current, 40 mA) and for panoramic radiography (75 kV, 8 mA, 15 seconds) were measured in one patient by using thermoluminescent dosimeter chips. Results were 0.56 +/- 0.06 mGy for CT and 0.59 +/- 0.04 mGy for radiography. Image quality was adequate for preoperative implant planning. Spiral CT of the mandible and maxilla may therefore be feasible with a radiation dose of similar magnitude as that used for conventional panoramic radiography.