摘要:
The invention concerns an integrated dental care apparatus which comprises a patient chair and a dental care unit, which according to the invention are arranged to comprise means for mounting the dental care unit on a floor while the dental care unit and the patient chair are structurally connected by means which support the patient chair, and wherein both the dental care unit and the patient chair are arranged to comprise means for enabling them to be turned in relation to a vertical axis.
摘要:
An integrated dental care apparatus includes a patient chair and a dental care unit. The dental care unit is mounted on a floor while the dental care unit and the patient chair are structurally connected by a structure which supports the patient chair. Both the dental care unit and the patient chair have means for enabling them to be turned in relation to a vertical axis.
摘要:
The present invention relates to a cranial radiography apparatus, particularly intended for dental panoramic radiography, said apparatus comprising a first body part to which is connected a second body part (13) having thereto connected a third body part (14) to which is connected a fourth body part (15). To the opposite ends of said fourth body part (15) are connected an x-ray source and an x-ray detector. The body parts are connected to each other by means of pivot shafts aligned essentially parallel to each other. The pivot shafts are rotated by means of active actuators and their rotational movement is programmably controlled by means of a computer, thus permitting the x-ray source and the x-ray detector to be moved over any predetermined orbit. The apparatus further includes means for radiography using a cephalostat. The apparatus can be adapted for robotic change of the x-ray detector by virtue of said movements of the body parts of the apparatus and a storage post designed to store the x-ray detectors used in different radiography modes.
摘要:
The invention relates to a method and an arrangement for controlling the movements of the functional elements (13-16) of an X-ray apparatus, such as a panoramic X-ray apparatus. In the method, one or more power means (1) provided with a control system (21), a power stage (11) and a rotating power output shaft (2) is/are controlled so as to produce the aforesaid movements of the functional elements. The power output shaft (2) of the power means is caused to rotate by the control system and the power stage so that the power output shaft is in direct contact with the force receiving means (3, 3a) of the functional element.
摘要:
Silicon wafers in the entire volume of which crystal lattice vacancies are the prevalent point defect type, have a rotationally symmetric region whose width is at least 80% of the wafer radius, crystal lattice vacancy agglomerates of at least 30 nm in a density ≦6·103 cm−3, crystal lattice vacancy agglomerates of from 10 nm to 30 nm in a density of 1·105 cm−3 to 3·107 cm−3, OSF seeds in a density of 0 to 10 cm−2, and an average bulk BMD density of 5·108 cm−3 to 5·109 cm−3, which varies at most by a factor of 10 radially over the entire silicon wafer, and a BMD-free layer on the front side, wherein the first BMD is found at a depth of at least 5 μm and on average at a depth of at least 8 μm.
摘要翻译:整个体积的硅晶片的晶格空位是普遍的点缺陷型,具有宽度为晶片半径的至少80%的旋转对称区域,密度为nlE的晶格空位团聚体至少为30nm; 6 ·103cm -3,密度为1×105cm -3〜3×10 7 cm -3的10nm〜30nm的晶格空位团聚体,密度为0〜10cm -2的OSF种子, 平均体积BMD密度为5×10 8 cm -3至5×10 9 cm -3,其在整个硅晶片上径向上变化至多10倍,而在前侧具有无BMD层,其中第一BMD 发现深度至少为5μm,平均深度至少为8μm。
摘要:
This invention relates to tomographic imaging, and particularly to producing complex motion or spiral tomography images in medical X-ray imaging. According to the invention, a curved path is arranged for the radiation source of the imaging apparatus in the vertical direction with respect to the object to be imaged, and a counter-movement with respect to the curved movement of the radiation source in the vertical is implemented by moving the radiation detector substantially linearly with respect to the radiation source on the opposite side of the object to be imaged. It is also preferable to keep the detector constantly parallel with a cross-sectional plan through the object to be imaged.
摘要:
Computed tomography apparatus for odontology, which includes an arm part arranged to be turnable, to which arm part at a distance from each other a radiation source and a receiver of image information have been arranged, in which apparatus said arm part is arranged to locate or to be transferred to such location with respect to the volume desired to be imaged that when the arm part is turned during the imaging, at least over a substantial angular range only a portion of the volume arranged to become imaged is within the radiation beam, and in which the control system of the apparatus comprises a control routine which then controls said radiation source to generate radiation as pulsed.
摘要:
A panoramic X-ray apparatus, comprising at least a support element (2), a patient support (9) arranged to be movable in a vertical direction and an imaging station (4a). The panoramic X-ray apparatus has a support structure (4) arranged to support at least the imaging station (4a), and it has an actuator (15) producing a vertical linear motion for moving at least the imaging station (4a) to different height positions. The panoramic X-ray apparatus comprises a transmission mechanism (28) which affects the velocity/travel distance of the vertical movement of the imaging station (4a) and which is connected at least to the actuator (15) and either to the aforesaid support structure (4) or to the aforesaid support element in such manner that the velocity/travel distance of the vertical movement of the imaging station (4a) is substantially greater than the velocity/travel distance of the motion imparted by the actuator (15) to the transmission mechanism (28).
摘要:
The present invention relates to limiting an x-ray beam used in connection with dental extra oral imaging by a plate mechanism (1) arranged to be operated by a drive mechanism including an actuator (3) arranged to move at least one plate element (2, 3) comprised in the mechanism (1). The plate mechanism (1) includes at least a first and a second plate element (2, 3) which include at least a first slot (12) and a second slot (13), respectively, and said drive mechanism is arranged to directly or indirectly move said first plate element (2) independently of location of said second plate element (3) and said second plate element (3) is arranged to be moved as dependent on the movements of said first plate element (2) only.