title: Attenuation of x-ray in muscle and alveolar bone during mandibular premolar periapical radiographic procedure.
abstract: The main purpose of this study is to find out the degree of attenuation when the x-ray entrances the skin and reaches the film at the bone area near the mandibular premolar root apex. In this study we used thermaluminescent dosimeters (TLDs) to measure the entrance dose and exit dose directly at the area of interest and calculated the penetration value P. We also simulated the attenuation process and calculated the P value in similar conditions. The results indicate that the mean P value of direct measurement from patient is 0.071 +/- 0.018 (60kVp, HVL = 1.5mm Al), while that for theoretical calculation is 0.06458 at 27keV. We concluded that P value of direct measurement can match with the theoretical value and further studies in jaw bone density and other related portions is worthwhile.
authors.affiliation: Graduate Institute of Dentistry, Kaohsiung Medical College, Taiwan, Republic of China.
authors.forename: P C
authors.initials: PC
authors.lastname: Chiu
authors.forename: Y H
authors.initials: YH
authors.lastname: Yan
authors.forename: L M
authors.initials: LM
authors.lastname: Lin
authors.forename: P S
authors.initials: PS
authors.lastname: Chang
mesh_terms: D000539:Alveolar Process / Q000528:radiation effects*; D005260:Female; D006801:Humans; D008297:Male; D008334:Mandible / Q000528:radiation effects*; D009132:Muscles / Q000528:radiation effects*; D011829:Radiation Dosage