[Radiation doses delivered to the critical organs during radiological studies of chronic sinusitis. Comparison between TDM and standard radiographies].
Computed tomography (CT) is the gold standard for exact delineation of inflammatory sinus disease, especially before endoscopic surgical treatment. Thermoluminescent dosimetry studies were performed on a Rando humanoid phantom to compare radiation doses used in sinus examinations. Radiation doses were determined for lens, thyroid gland, condylar marrow and brain. Studies included standard sinus views (Waters, Caldwell, Hirtz and lateral), CT scan in axial and coronal planes and in planes determined by the axis of the naso-frontal duct, CT low-dose. Lens received doses of 7.4 mGy, 33.6 mGy, 32.2 mGy, 15.0 mGy, respectively, for standard sinus views, CT scan axial and coronal planes, CT scan in planes determined by the axis of the naso-frontal duct and low-dose CT, thyroid gland received doses of 10.1 mGy, 27.2 mGy, 3.9 mGy and 1.4 mGy respectively, condylar marrow received doses of 2.0 mGy, 32.0 mGy, 20.4 mGy and 7.2 mGy respectively and brain received doses of 2.3 mGy, 14.2 mGy, 6.0 mGy and 2.0 mGy. The radiation doses from CT low-dose are slightly higher than standard sinus views but the health benefits are also higher. Therefore, the authors recommend the use of CT low-dose in paranasal sinus studies.
Nadas
S
S
Service de Radiodiagnostic, Centre Universitaire, CHUY, Lausanne, Suisse.
Duvoisin
B
B
Raimondi
S
S
Schnyder
P
P
D001853:Bone Marrow / Q000528:radiation effects; D001921:Brain / Q000528:radiation effects; D002908:Chronic Disease; D004307:Dose-Response Relationship, Radiation; D006801:Humans; D007908:Lens, Crystalline / Q000528:radiation effects; D008334:Mandible / Q000528:radiation effects; D008348:Manikins; D011829:Radiation Dosage; D011832:Radiation Injuries / Q000517:prevention & control; D012852:Sinusitis / Q000000981:diagnostic imaging*; D013961:Thyroid Gland / Q000528:radiation effects; D014057:Tomography, X-Ray Computed
Dose délivrée aux organes critiques lors d'investigations radiologiques d'une sinusite chronique. Comparaison entre la TDM et les radiographies standard.