Dental imaging with photon-counting detector

1. A dental imaging apparatus for obtaining an image from a patient, the apparatus comprising:

a radiation source;

a first digital imaging sensor that provides, for each of a plurality of image pixels, at least a first digital value according to a count of received photons that exceed at least a first energy threshold;

a mount that supports the radiation source and the first digital imaging sensor on opposite sides of an imaging area for the patient;

a computer in signal communication with the first digital imaging sensor for acquiring one or more two-dimensional images from the first digital imaging sensor;

a controller electrically coupled to the radiation source, the first digital imaging sensor, the mount and the computer, the controller configured to operate the dental imaging apparatus in two or more imaging modes, where the two or more imaging modes comprises a combination of volume imaging, CT imaging, panoramic imaging, or cephalometric imaging, where the two or more imaging modes are configured to use the first digital imaging sensor; and

an alignment apparatus to provide alignment of the imaging area for a patient's head for obtaining the one or more images, where the alignment apparatus, comprises:

a main body having opposing first and second sides and supports first and second holding members for positioning against the patient's head, wherein the first holding member has a first reference position along the first side of the main body and is coupled to a first transport apparatus that extends outward from the main body, and wherein the second holding member has a second reference position along the second side of the main body and is coupled to a second transport apparatus that extends outward from the main body; and

an extension locking mechanism within the main body that locks the position of the second transport apparatus when the first holding member is moved from the first reference position and that locks the position of the first transport apparatus when the second holding member is moved from the second reference position.

2. The dental imaging apparatus of claim 1 , comprising at least one second digital imaging sensor that is alternately switched into place by the mount for use by the dental imaging apparatus and to provide image data according to received radiation, where the dental imaging apparatus comprises at least an extra-oral dental imaging apparatus.