CT scanner (evolution)
Updates to Article Attributes
Evolution of CT scanners
First CT scanner was introducedfirst introduced in 1971 with a single detector for an brain study. Thereafter it has undergone several changes with increase in number of detectors and decrease in the scan time.
First generation
Detectors : one
Type of beam: pencil-like X-ray beam
Tube-detector movements: translate-rotate
Duration of scan (average): 25-30 mins
Second generation
Detectors-: multiple upto(upto 30)
Type of beam-: fan shaped x-ray beam
Tube-detector movements: translate-rotate
Duration of scan (average): less than 90 s
Third generation
Detectors- : multiple, originally 288 ; newer ones used over 700 arranged in an arc
Type of beam-: fan shaped x-ray beam
Tube-detector movements: rotate-rotate
Duration of scan (average): approximately 5s
Fourth generation
Detectors-: multiple (more than 2000) arranged in an outer ring which is fixed
Type of beam-: fan shaped x-ray beam
Tube-detector movements: rotate-fixed
Duration of scan (average): few seconds
-<h4>Evolution of CT scanners</h4><p>First CT scanner was introduced introduced in 1971</p><p> </p><h5>First generation </h5><p>Detectors : one</p><p>Type of beam: pencil-like X-ray beam</p><p>Tube-detector movements: translate-rotate</p><p>Duration of scan (average): 25-30 mins</p><p> </p><p> </p><h5> </h5><h5>Second generation </h5><p>Detectors- multiple upto 30</p><p>Type of beam- fan shaped x-ray beam</p><p>Tube-detector movements: translate-rotate</p><p>Duration of scan (average) less than 90 s</p><p> </p><p> </p><p> </p><p> </p><h5>Third generation </h5><p> </p><p>Detectors- multiple originally 288 ; newer ones used over 700 arranged in an arc</p><p>Type of beam- fan shaped x-ray beam</p><p>Tube-detector movements: rotate-rotate</p><p>Duration of scan (average): approximately 5s</p><p> </p><p> </p><p> </p><p> </p><p> </p><p> </p><p> </p><h5>Fourth generation</h5><p> </p><p>Detectors- multiple arranged in an outer ring which is fixed</p><p>Type of beam- fan shaped x-ray beam</p><p>Tube-detector movements: rotate-fixed </p><p>Duration of scan (average) few seconds</p>- +<p><strong>CT scanner </strong>was first introduced in 1971 with a single detector for an brain study. Thereafter it has undergone several changes with increase in number of detectors and decrease in the scan time.</p><p> </p><h4>First generation </h4><p>Detectors : one</p><p>Type of beam: pencil-like X-ray beam</p><p>Tube-detector movements: translate-rotate</p><p>Duration of scan (average): 25-30 mins</p><p> </p><h4><strong>Second generation </strong></h4><p>Detectors: multiple (upto 30)</p><p>Type of beam: fan shaped x-ray beam</p><p>Tube-detector movements: translate-rotate</p><p>Duration of scan (average): less than 90 s</p><p> </p><h4><strong>Third generation </strong></h4><p>Detectors : multiple, originally 288 ; newer ones used over 700 arranged in an arc</p><p>Type of beam: fan shaped x-ray beam</p><p>Tube-detector movements: rotate-rotate</p><p>Duration of scan (average): approximately 5s</p><p> </p><h4><strong>Fourth generation</strong></h4><p>Detectors: multiple (more than 2000) arranged in an outer ring which is fixed</p><p>Type of beam: fan shaped x-ray beam</p><p>Tube-detector movements: rotate-fixed </p><p>Duration of scan (average): few seconds</p>
References changed:
- 1. Curry TS, Dowdey JE, Murry RE. Christensen ́s physics of diagnostic radiology 4 Ed. Lippincott Williams & Wilkins. (1990) ISBN:0812113101. <a href="http://books.google.com/books?vid=ISBN0812113101">Read it at Google Books</a> - <a href="http://www.amazon.com/gp/product/0812113101">Find it at Amazon</a><span class="ref_v3"></span>
Sections changed:
- Imaging Technology
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