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Pitfalls in image reconstruction of helical CT angiography: an experimental study

✍ Scribed by I. Ogata; Y. Yamashita; S. Sumi; T. Nishiharu; K. Mitsuzaki; M. Takahashi

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
271 KB
Volume
23
Category
Article
ISSN
0895-6111

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✦ Synopsis

This study was undertaken to evaluate the effects of the object related factors: background tissue and the direction of vessels on the morphological reproducibility of helical CT angiography. Cylindrical tubes filled with a diluted contrast medium were prepared to obtain vascular phantoms. The scan was performed within various background tissues. For the evaluation of the direction of the vessels, two types of vascular phantoms were prepared. The phantoms were scanned by varying beam collimations and scan pitches. Reconstructed CT images were markedly affected by the background tissue. The reconstructed images were also affected by the direction of vessels.

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