Underhill T E, Kimura K, Chilvarquer I, McDavid W D, Langlais R P, Preece J W, Barnwell G
Department of Dental Diagnostic Sciences, School of Dentistry, University of Texas Health Science Center, San Antonio.
Oral Surg Oral Med Oral Pathol. 1988 Aug;66(2):261-7. doi: 10.1016/0030-4220(88)90103-x.
With the use of the measured absorbed doses from part I of this article, the specific radiobiologic risk to the patient from (1) five different panoramic machines with rare-earth screens, (2) a 20-film complete-mouth survey with E-speed film, long round cone, (3) a 20-film complete-mouth survey with E-speed film, long rectangular cone, (4) a 4-film interproximal survey with E-speed film, long round cone, and (5) a 4-film interproximal survey with E-speed film, long rectangular cone, was calculated. The estimated risks are expressed in two ways: the probability of radiation-induced cancer in specific organs per million examinations and the probability of expression of a fatal cancer per million examinations. The highest risks calculated were from the complete-mouth survey with the use of round collimation. The lowest risks calculated were from panoramic radiography and four interproximal radiographs with rectangular collimation.
利用本文第一部分中测量得到的吸收剂量，计算了患者因以下情况而面临的特定放射生物学风险：(1) 五台配备稀土增感屏的不同全景机；(2) 使用E速胶片、长圆形准直器进行的20张全口牙片检查；(3) 使用E速胶片、长矩形准直器进行的20张全口牙片检查；(4) 使用E速胶片、长圆形准直器进行的4张邻面牙片检查；(5) 使用E速胶片、长矩形准直器进行的4张邻面牙片检查。估计的风险以两种方式表示：每百万次检查中特定器官发生辐射诱发癌症的概率以及每百万次检查中发生致命癌症的概率。计算得出的最高风险来自使用圆形准直器的全口牙片检查。计算得出的最低风险来自全景放射摄影和使用矩形准直器的四张邻面牙片。
