By Mathias Prokop
This new ebook expertly fills a niche within the literature by means of offering the state of the art features and specifications of CT as a key diagnostic and interventional device, with designated emphasis at the position of spiral CT. you can find an entire advent to the technical features and simple ideas of photograph interpretation, crucial for totally using the hot expertise and offering “all you must recognize” to start. The booklet is going directly to conceal layout of CT scanners, sufferer instruction, scanning thoughts, and photo analysis.Highlights include:- instructions for optimum use of CT and fending off mistakes- steered scanning parameters that yield excessive snapshot caliber, key diagnostic details, and keep radiation defense- handy structure via organ process and disorder entity, with CT symptoms built-in all through with different imaging modalities- complete dialogue of organ-specific pathology
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Additional info for Spiral and Multislice Computed Tomography of the Body ( THIEME )
Even if the scanner is allowed to change the rnA to provide equal image quality, HQ. With the SmartHelical protocol. image noise can be reduced for both modes as compared to conventional helical CT. When switching from a GE single-slice scanner to amultislice unit, the patient dose increases dramatically if mAs settings are kept unchanged. The reason for this is the shorter scanner geometry, which yields a higher dose per mAs and problems with focal spot tracking. which were solved shortly after the first release of the LightSpeed scanner.
4), and true real-time interaction are important for timeefficient image review and reporting. Processing workstations need to be equipped with sufficient computing power and memory. For multislice CT with several hundred images, the RAM should be more than 1 GB in size. For interactive volume rendering, accelerator boards are available that make real-time interaction possible (several frames per second). They differ with respect to the available matrix size for real-time interaction, and whether they allow for perspective rendering (important for virtual endoscopy) .
Image reconstmction from the raw data set can take a substantial time, even with sub-second reconstruction, if some 300-400 images are reconstructed for the chest or 400-500 images are reconstructed for one abdominal series. For this reason, very fast reconstruction (multiple images per second) is important to allow for a high patient throughput. Standard image reviewing is best performed on thick axial or multiplanar reformations that were reconstructed by the CT technician according to a predefined protocol that depends on the clinical imaging task (see Chapter 4, and the various organ chapters).