PT - JOURNAL ARTICLE AU - C G Diederichs AU - W G Engelke AU - B Richter AU - K P Hermann AU - J W Oestmann TI - Must radiation dose for CT of the maxilla and mandible be higher than that for conventional panoramic radiography? DP - 1996 Oct 01 TA - American Journal of Neuroradiology PG - 1758--1760 VI - 17 IP - 9 4099 - http://www.ajnr.org/content/17/9/1758.short 4100 - http://www.ajnr.org/content/17/9/1758.full SO - Am. J. Neuroradiol.1996 Oct 01; 17 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.