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Tuesday, August 07, 2012

Technical Principles and Applications of Multislice CT

This is post about book review of Protocols for Multislice CT (R. Brüning, A. Küttner, T. Flohr) by Springer , 20 Dec 2005 – 293 page, that provides structured up-to-date information on all routine protocols used for multislice (multidetector row) CT.In the first chapter T Flohr write about Technical Principles and Applications of Multislice CT. In summary, this is an excellent monograph to introduce the basic protocols regarding multi-section CT ... Anyone who is working in this area would benefit from this text. In the introduction page we can read the CT system development from first generation to four generation of CT System. He said that The introduction of spiral computed tomography (CT) in the early 1990s constituted fundamental evolutionary step in the development and ongoing refinement of CT imaging technique. For the first time , size data could be received without the danger of miss registration or twice registration of anatomical depth.
Images could be refurbished at any position down the patient and overlapping image reconstruction could be used to improve the image. The ability to acquire amount data also flat the way for development associated with 3D image digesting techniques such as maximum-intensity projection (MIP ), volume-rendering techniques(VRT) ,multiplanar reformation(MPR), , surface-shaded display(SSP), etc, which have become vital component of imaging today. The main drawbacks of single-slice spiral CT are either insufficient volume coverage within one breath hold time of patient or missing spatial resolution on z axis due to to wide collimation. With single slice spiral CT the ideal of isotropic resolution ,i.e. of equal resolution in all three spatial axes, can only be achieved for very limited scan ranges,

Then he write that Currently, the race for more slices in on going. In 2004 , all major manufactures introduced MSCT-system with 32,40 ,64 simultaneously acquired slices, which brought about a further leap in volume coverage speed. Some of these scanners use double z-sampling, refined z sampling technique enabled by a periodic motion of focal spot in z direction (z flying focal spot0, to further enhance longitudinal resolution and image quality in clinical routine. With the most recent generation of CT System, CT angiographic examination with submillimeter resolution un the pure arterial phase become feasible even for extended anatomical resolution in the pure arterial phase become feasible even for extended anatomical range. The improved temporal resolution due to gantry rotation times down to 0.33s has been potential to increase clinical robustness of ECG-gated scanning at higher hearts rates, thereby significantly reducing the number of patient requiring heart rate control and facilitating the successful integration of CT coronary angiography into routine clinical algorithms.

The paragraph topic in this chapter are include :

Technical and Dose Consideration of MSCT

xray array detector ct scan

 

Examples of fixed array detector and adaptive array detector used in commercially available 4 slice, 16 slice and 64 slice CT System

By reading the particular Technical Principles and Applications of Multislice CT, this section you'll be able to better understand the historic development of multislice CT scanner. You will get a knowledge with online and any developments range from the generation, development of the sort of collage, the addition of factors, reduction of radiation dose, including how to examine a more complete involving imaging technique. For decision to have a book to be support your profession.

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