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Keywords:
Fistula, Arteriovenous malformations, Aneurysms, Computer Applications-3D, Arterial access, Cone beam CT, Catheter arteriography, Neuroradiology brain, Interventional vascular, Head and neck
Authors:
Y. Tachibana1, T. Ishida1, K. Amakawa1, M. Mori1, S. Tateishi1, H. ohura1, R. Miyajima1, S. Orita2, T. Tsumoto1; 1Fukuoka/JP, 2FUKUOKA-si, FUKUOKA/JP
DOI:
10.1594/ecr2016/C-1040
Results
Modulation transfer function
The results of the MTF on HRCBCT images and 3DRA images are shown in Fig.
5.
The MTF values of HRCBCT images were superior to those of 3DRA images in the high frequency range.
Each 10% point of the modulation-transfer-function (10% MTF) was 2.23 cycles/mm and 1.81 cycles/mm,
respectively.
The 10% MTF of HRCBCT images were 1.23 times higher than 3DRA images.
Noise power spectrum
The results of the NPS on HRCBCT images and 3DRA images are shown in Fig.
6.
Although both NPS declined with increasing frequency,
the graphic form of the NPS from HRCBCT images was quite different from that from 3DRA images.
The NPS of 3DRA images was considerably higher than that of HRCBCT in the low frequency range,
but this was reversed in the high frequency range.
Signal-to-noise ratio
The results of the SNR on HRCBCT images and 3DRA images are shown in Fig.
7. The HRCBCT image showed a higher SNR than the 3DRA image in all spatial frequency domains.
Contrast intensity
The contrast intensities of HRCBCT and 3DRA images are shown in Fig.
8.
The contrast intensity of the HRCBCT images was constantly higher than that of the 3DRA images depending on the concentration of contrast medium,
1.3 times at maximum.