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. 2019 Aug;61(8):953-956.
doi: 10.1007/s00234-019-02221-0. Epub 2019 May 18.

Improving resolution of head and neck CTA using the small x-ray tube focal spot

Johannes Rosskopf  1 , Michael Braun  2 , Meinrad Beer  3 , Bernd L Schmitz  3   2
Affiliations

Improving resolution of head and neck CTA using the small x-ray tube focal spot

Johannes Rosskopf et al. Neuroradiology. 2019 Aug.

Abstract

CT-resolution depends on tube focal spot size. To investigate the effect of reducing focal spot on vessel wall clarity, 22 patients underwent head and neck CTA acquisition with large and small focal spot size. Hounsfield density profile was assessed for each head and neck vessel separately, and significantly sharper density increase at vessel borders was observed using smaller tube focus by an average of 9.9% to 82° angle degrees (p < .05). In conclusion, spatial resolution of CTA of head and neck vessels can be improved by using the small x-ray tube focal spot.

Keywords: Arteries; Cerebral angiography; Computed tomography angiography; Neck; Radiographic image enhancement.

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