Patient positioning device in medical panorama X-ray photographing apparatus
First Claim
1. A medical panorama X-ray photographing apparatus, comprising a position detecting sensor for detecting the relative position of a dental arch to be examined to the X-ray photographing apparatus, a comparing arithmetic circuit for comparing detected position data from the sensor with data of the relative position of a tomographic zone to the X-ray photographing apparatus, and a drive circuit for relatively displacing a tomograph forming assembly and a patient holding means by means of an output from said comparing arithmetic circuit so that the subject and tomographic zone can coincide with each other, and said sensor is a non-contact or contact type sensor arranged so as to be confronted with at least the front teeth of said dental arch and one of the patient holding means and tomograph forming assembly and a main body in the X-ray photographing apparatus.
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Accused Products
Abstract
A patient positioning device in a medical panorama X-ray photographing apparatus in which after data of the relative position of the subject to the X-ray photographing apparatus supplied from a sensor is compared with data of the relative position of a tomographic zone to the X-ray photographing apparatus thus to produce comparison data which is in turn transmitted to a drive circuit, a tomograph forming assembly and/or the subject is moved from coinciding with each other. The device further includes a comparing arithmetic circuit in which the detected position data of the subject and position data of the tomographic zone are arithmetically compared in order to improve operatability and positioning accuracy. The device furthermore includes a sensor which is adjustable for angular and vertical setting with the use of sensing position changing means in order to improve adaptability to individualities of the subject.
55 Citations
11 Claims
- 1. A medical panorama X-ray photographing apparatus, comprising a position detecting sensor for detecting the relative position of a dental arch to be examined to the X-ray photographing apparatus, a comparing arithmetic circuit for comparing detected position data from the sensor with data of the relative position of a tomographic zone to the X-ray photographing apparatus, and a drive circuit for relatively displacing a tomograph forming assembly and a patient holding means by means of an output from said comparing arithmetic circuit so that the subject and tomographic zone can coincide with each other, and said sensor is a non-contact or contact type sensor arranged so as to be confronted with at least the front teeth of said dental arch and one of the patient holding means and tomograph forming assembly and a main body in the X-ray photographing apparatus.
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11. A medical panorama X-ray photographing apparatus, comprising a position detecting sensor for detecting the relative position of a subject to be examined to the X-ray photographing apparatus, a comparing arithmetic circuit for comparing detected position data from the sensor with data of the relative position of a tomographic zone to the X-ray photographing apparatus, and a drive circuit for relatively displacing a tomograph forming assembly and a patient holding means by means of an output from said comparing arithmetic circuit so that the subject and tomographic zone can coincide with each other, and wherein said position data of said tomographic zone is supplied to said comparing arithmetic circuit by means of a reference distance producing circuit, and said reference distance data producing circuit sets the reference position of the tomography to a position approximately coincided with the position of a dental arch of a patient.
Specification