Flat-panel Volume CT is a technique under development to make
computed tomography
A computed tomography scan (CT scan; formerly called computed axial tomography scan or CAT scan) is a medical imaging technique used to obtain detailed internal images of the body. The personnel that perform CT scans are called radiographers ...
images with improved performance (in particular, with improved spatial resolution). The key difference between volume CT and traditional CT is that volume CT uses a two-dimensional x-ray detector orientation (usually in a square panel orientation), to take multiple two-dimensional images. On the other hand, the conventional CT uses a one-dimensional x-ray detector orientation (a row of detectors) to take one-dimensional x-ray images.
A CT machine consists of an
x-ray
X-rays (or rarely, ''X-radiation'') are a form of high-energy electromagnetic radiation. In many languages, it is referred to as Röntgen radiation, after the German scientist Wilhelm Conrad Röntgen, who discovered it in 1895 and named it ' ...
source, an x-ray detector, a series of moving stages (
Gantry
A gantry is an overhead bridge-like structure supporting equipment such as a crane, signals, or cameras.
Devices and structures
* Gantry (medical), cylindrical scanner assembly used for medical 3D-imaging or treatment
* Gantry (transport), an ov ...
) and computers to assemble the x-ray data into an image. The x-ray beam used in volume CT is cone shaped, in contrast to the fan shaped beam of the regular CT scanner. This cone shape allows the beam to cover the two-dimensional detector panel.
See also
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Industrial CT Scanning
Industrial computed tomography (CT) scanning is any computer-aided tomographic process, usually X-ray computed tomography, that uses irradiation to produce three-dimensional internal and external representations of a scanned object. Industrial C ...
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Radiology
Radiology ( ) is the medical discipline that uses medical imaging to diagnose diseases and guide their treatment, within the bodies of humans and other animals. It began with radiography (which is why its name has a root referring to radiati ...
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Computed Tomography
A computed tomography scan (CT scan; formerly called computed axial tomography scan or CAT scan) is a medical imaging technique used to obtain detailed internal images of the body. The personnel that perform CT scans are called radiographers ...
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Medical Imaging
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Cone beam reconstruction
In microtomography X-ray scanners, cone beam reconstruction is one of two common scanning methods, the other being Fan beam reconstruction.
Cone beam reconstruction uses a 2-dimensional approach for obtaining projection data. Instead of utili ...
References
* Flat-panel volume CT: fundamental principles, technology, and applications. Gupta R, Cheung AC, Bartling SH, Lisauskas J, Grasruck M, Leidecker C, Schmidt B, Flohr T, Brady TJ. Radiographics. 2008 Nov-Dec;28(7):2009-22.
* Ultra-high resolution flat-panel volume CT: fundamental principles, design architecture, and system characterization. Gupta R, Grasruck M, Suess C, Bartling SH, Schmidt B, Stierstorfer K, Popescu S, Brady T, Flohr T. Eur Radiol. 2006 Jun;16(6):1191-205. Epub 2006 Mar 10.
Tomography
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