Objectives. To optimize the absorbed organ dose in relation to the field of view for temporomandibular joint examinations in four cone beam computed tomography devices. Methods. An anthropomorphic adult head and neck phantom, and 192 LiF dosimeters (TLD-100) were used. The dosimeters were placed in the region corresponding to the lens, parotid glands, submandibular glands, and thyroid. Small, medium and large FOVs were selected on Orthopantomograph OP300 Maxio, PaX-i3D Smart, ORTHOPHOS XG, and i-CAT Next Generation device when it was possible. Results. A wide range of absorbed dose values was recorded for all organs due to the different exposure parameters of each device. The radiosensitive organ with the highest dose was the parotid glands. The devices with 5נ5 cm FOV recorded a lower dose in this protocol, while for the device without a small FOV (≤5נ5 cm), the lowest dose was observed with the large FOV (6נ16 cm). Conclusions. We recommend a double exposure with an FOV of 5נ5 cm in the OP300 Maxio, PaX-i3D Smart, and ORTHOPHOS XG device, while in the i-CAT Next Generation device, a single exposure FOV of 6נ16 cm is indicated.

目标。在四个锥形束计算机断层扫描设备中优化与视野相关的吸收器官剂量，以进行颞下颌关节检查。方法。使用了拟人化的成人头颈部体模和 192 个 LiF 剂量计 (TLD-100)。剂量计放置在与晶状体、腮腺、下颌下腺和甲状腺相对应的区域。在可能的情况下，在 Orthopantomograph OP300 Maxio、PaX-i3D Smart、ORTHOPHOS XG 和 i-CAT 下一代设备上选择了小型、中型和大型 FOV。结果。由于每个设备的不同暴露参数，所有器官的吸收剂量值范围很广。剂量最高的放射敏感器官是腮腺。在该协议中，FOV 为 5נ5 cm 的设备记录的剂量较低，而对于没有小 FOV（≤5נ5 cm）的设备，观察到大 FOV（6נ16 cm）的最低剂量。结论。我们建议在 OP300 Maxio、PaX-i3D Smart 和 ORTHOPHOS XG 设备中使用 5 至 5 厘米的 FOV 进行双重曝光，而在 i-CAT 下一代设备中，指示 6 至 16 厘米的单次曝光 FOV。