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Components of CT Scan Machine

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lourabelle farolan

on 12 March 2016

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Transcript of Components of CT Scan Machine

Components of CT Scan Machine
the main

components of a ct scan
CT Scanner
Computerized (or computed) tomography, and often formerly referred to as computerized axial tomography (CAT) scan, is an X-ray procedure that combines many X-ray images with the aid of a computer to generate cross-sectional views and, if needed, three-dimensional images of the internal organs and structures of the body.
gantry
The Gantry assembly is the largest of these system. It is made up all the equipment related to the patient, including the patient support, the positioning couch, the mechanical supports, and the scanner housing. It also contains the heart of the CAT Scanner, the x-ray tube, as well as the detectors that generate and detect x-ray.
Data Acquisition System
External
Internal
The DAS consist of the following:
Detector
Current to
voltage
convertor
Pre
amplifier
analog
integrator
analog to
digital
convertor
Computer
X-ray photons come on the detector.
The detector detects the intensity in form of current.
The current is converted into voltage.
the analog integrator removes spikes.
The analog signal is converted into digital form.
This signal can now be processed and reconstructed in the computer.
image reconstruction
After enough transmission measurement (detector)
Sent to the computer for processing
A software called Fourier slice transform is used
More than 250,000 reconstruction algorithms are used to compute the image.
operating console
The Operating Console is the master control center of the CAT Scanner.
It is used to input all of the factors related to talking a scan.
Typically, this console is made up of a computer, one used by the CAT Scanner operator, and the other used by the physician.
The operator's console controls such variables as the thickness of the image tissue slice, mechanical movement of the patient couch, and other radiographic technique factors.
Advantages
First, CT completely eliminates the superimposition of images of structures outside the areaof interest.
Second, because of the inherent high-contrast resolution of CT, Differences between tissues that differ in physical density by less than 1% can be distinguished.
Third, data from a single CT imaging procedure consisting of either multiple contiguous or one helical scan can be be viewed as images in the axial, coronal, or sagittal planes, depending, on the diagnostic task. This is referred to as multiplanar reformatted imaging.
benefits
Ct Scanning is painless, noninvasive and accurate.
A major advantages of CT is its ability to image bone , soft tissue and blood vessels all at the same time.
Unlike conventional x-rays, CT scanning provides very detailed images of many types of tissue as well as the lungs, bones, and blood vessels.
CT examinations are fast and simple in emergency cases, they can reveal internal injuries and bleeding quickly enough to help save lives.
CT has been shown to be a cost-effective imaging tool for a wide range of clinical problems.
CT is less sensitive to patient movement than MRI
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