Wednesday, April 22, 2015

Mengenal system Improved Head Imaging pada CT Scan

The head protocols provide significant improvements regarding image quality for heads. An automatic bone correction algorithm has been included in the standard image reconstruction. Using a new iterative technique, typical artifacts arising from the beam-hardening effect, for example, Hounsfield bar, are minimized without additional post-processing. This advanced algorithm produces excellent images of the posterior fossa, but also improves head image quality in general.
Bone correction is activated automatically for body region “Head”. The reconstruction algorithm for “Head” also employs special adaptive convolution kernels which help to improve the sharpness-to-noise ratio.
More precisely, anatomic contours are clearly displayed while noise is suppressed at the same time without causing a blurring of edges.

image

Head image without correction. and Head image with corrections

In order to optimize image quality versus radiation dose, scans in body regions “Head” and “AngioHead” are provided within a maximum scan field of 300 mm with respect to the iso-center. No recon job with a field of view exceeding those limits will be possible. Therefore, patient positioning has to be performed accurately to ensure a centered location of the skull.

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correct positioning Of the head and wrong positioning of the head

For trauma examinations of the head we provide two protocols, to be found in the specials folder:
– HeadTrauma
– HeadTraumaSeq.
The scan protocols enable you to utilize the full 50 cm FoV, resulting in easier patient positioning for trauma examinations and to ensure the highest performance, the dedicated PFO head filter is not used.

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