caa a22 4500 46317870X CHVBK 20180406164832.0 cr unu---uuuuu 170326e20071201xx s 000 0 eng 10.1007/s10278-006-0855-6 doi (NATIONALLICENCE)springer-10.1007/s10278-006-0855-6 Microcatheter Tip Enhancement in Fluoroscopy: A Comparison of Techniques [Elektronische Daten] [Akihiro Takemura, Kenneth Hoffmann, Masayuki Suzuki, Zhou Wang, Hussain Rangwala, Hajime Harauchi, Stephen Rudin, Tokuo Umeda] We compared three techniques for enhancement of microcatheter tips in fluoroscopic images: conventional subtraction technique (CST); averaged image subtraction technique (AIST), which we have developed; and double average filtering (DAF) technique, which uses nonlinear background estimates. A pulsed fluoroscopic image sequence was obtained as a microcatheter was passed through a carotid phantom that was on top of a head phantom. The carotid phantom was a silicone cylinder containing a simulated vessel with the shape and curvatures of the internal carotid artery. The three techniques were applied to the images of the sequence, then the catheter tip was manually identified in each image, and 100 x 100 pixel images, centered at the indicated microcatheter tip positions, were extracted for the evaluations. The signal-to-noise ratio (SNR) was calculated in each of the extracted images from which the mean value of the SNR and its standard deviation (SD) were calculated for each technique. The mean values and the standard deviations were 4.36 (SD 3.40) for CST, 6.34 (SD 3.62) for AIST, and 3.55 (SD 1.27) for DAF. AIST had a higher SNR compared to CST in almost all frames. Although DAF yielded the smallest mean SNR value, it yielded the best SNR in those frames in which the microcatheter tip did not move between frames. We conclude that AIST provides the best SNR for a moving microcatheter tip and that DAF is optimal for a temporarily stationary microcatheter tip. SCAR (Society for Computer Applications in Radiology), 2007 Microcatheter tracking nationallicence enhancement technique nationallicence subtraction technique nationallicence signal-to-noise ratio nationallicence comparison of techniques nationallicence fluorography nationallicence endovascular intervention nationallicence Takemura Akihiro School of Health Sciences, Faculty of Medicine, Kanazawa University, 5-11-80 Kodatsuno, 920-0942, Kanazawa, Japan aut Hoffmann Kenneth Toshiba Stroke Research Center, University at Buffalo (SUNY), 3435 Main St., 14214, Buffalo, NY, USA aut Suzuki Masayuki School of Health Sciences, Faculty of Medicine, Kanazawa University, 5-11-80 Kodatsuno, 920-0942, Kanazawa, Japan aut Wang Zhou Roswell Park Cancer Institute, Elm & Carlton St., 14263, Buffalo, NY, USA aut Rangwala Hussain Toshiba Stroke Research Center, University at Buffalo (SUNY), 3435 Main St., 14214, Buffalo, NY, USA aut Harauchi Hajime School of Allied Health Sciences, Faculty of Medicine, Osaka University, 1-7 Yamadaoka, 565-0871, Suita, Japan aut Rudin Stephen Toshiba Stroke Research Center, University at Buffalo (SUNY), 3435 Main St., 14214, Buffalo, NY, USA aut Umeda Tokuo School of Allied Health Sciences, Kitasato University, 1-15-1 Kitasato, 228-8555, Kanagawa, Sagamihara, Japan aut Journal of Digital Imaging Springer-Verlag; http://www.springer-ny.com 20/4(2007-12-01), 367-372 0897-1889 20:4<367 2007 20 10278 https://doi.org/10.1007/s10278-006-0855-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10278-006-0855-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Takemura Akihiro School of Health Sciences, Faculty of Medicine, Kanazawa University, 5-11-80 Kodatsuno, 920-0942, Kanazawa, Japan aut NATIONALLICENCE 700 1- Hoffmann Kenneth Toshiba Stroke Research Center, University at Buffalo (SUNY), 3435 Main St., 14214, Buffalo, NY, USA aut NATIONALLICENCE 700 1- Suzuki Masayuki School of Health Sciences, Faculty of Medicine, Kanazawa University, 5-11-80 Kodatsuno, 920-0942, Kanazawa, Japan aut NATIONALLICENCE 700 1- Wang Zhou Roswell Park Cancer Institute, Elm & Carlton St., 14263, Buffalo, NY, USA aut NATIONALLICENCE 700 1- Rangwala Hussain Toshiba Stroke Research Center, University at Buffalo (SUNY), 3435 Main St., 14214, Buffalo, NY, USA aut NATIONALLICENCE 700 1- Harauchi Hajime School of Allied Health Sciences, Faculty of Medicine, Osaka University, 1-7 Yamadaoka, 565-0871, Suita, Japan aut NATIONALLICENCE 700 1- Rudin Stephen Toshiba Stroke Research Center, University at Buffalo (SUNY), 3435 Main St., 14214, Buffalo, NY, USA aut NATIONALLICENCE 700 1- Umeda Tokuo School of Allied Health Sciences, Kitasato University, 1-15-1 Kitasato, 228-8555, Kanagawa, Sagamihara, Japan aut NATIONALLICENCE 773 0- Journal of Digital Imaging Springer-Verlag; http://www.springer-ny.com 20/4(2007-12-01), 367-372 0897-1889 20:4<367 2007 20 10278 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer