Grapefruit USA Inc (GPFT)

[goldcoastoh]

1st generation: short animation of

2nd generation: short animation of

3rd generation: short animation of (DViS-like)

4th generation: short animation of (this one hasn't really caught one)

5th generation: short animation of (this one is animation of the 5th generation type, it is currently in the market but limited as well... it is called ELECTRON BEAM COMPUTED TOMOGRAPHY... NOTE: there is no spinning gantry but rather the beam is projected... BECAUSE the beam is projected [and this is electronically] and there is no spinning mechanical components, the scan time is much faster...but, again not competitively viable yet.) this one reminds me of the "old-type" cathode ray tube television sets...

my 2 cents:

HOWEVER: i think flat panel CCD camera/detector plate technology (used in cone-beam CT (CBCT) and thus utilized in the DViS for CBCT and radiographic/fluoro *see below*) and the 3rd generation design will be an important part of the dose reduction method going forward...

http://radiographics.rsna.org/content/22/4/949.full



excerpt, with asterisks by me for emphasis -- from the article i used over the weekend and spoke of last evening... by Mahadevappa Mahesh.

Future Directions

CT technology has evolved considerably over the past 30 years (Fig 17). With the development of multiple-row detector CT, clinical scanners capable of producing eight to 32 sections per second are available. The next logical step is to increase the number of detector arrays; however, the problem of cone beam artifacts becomes significant with the current reconstruction methods. ***Future developments in the directions of cone beam reconstructions are under way, and the next-generation CT scanners will adopt this method so that large area detectors can replace multiple-array detectors.*** ***Area detectors such as the flat panel detectors currently introduced in general radiography will find applications in CT.*** With substantial z-axis coverage, it will be possible to scan most organs in one or two rotations. Scan times may be further reduced to 150 msec as the gantry is redesigned to withstand very high centrifugal force. The days of single rotation of the gantry resulting in coverage of almost the entire body are not too distant. This can lead to far-reaching applications such as comprehensive screening examinations. Image reconstruction times will continue to decrease, partly from the pressure of vast numbers of images that will be generated by CT examinations. With increased awareness about the radiation dose encountered during CT scanning, developments are under way to develop real-time exposure control to reduce radiation dose without loss of image quality by measuring attenuation within the patient during scanography or scout scanning and thereby adjusting the tube current during each gantry rotation.