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Spectral Imaging for Intracranial Stents and Stent Lumen

Application of computed tomography for monitoring intracranial stents is limited because of stent-related artifacts. Our purpose was to evaluate the effect of gemstone spectral imaging on the intracranial stent and stent lumen. In vitro, we scanned Enterprise stent phantom and a stent-cheese complex...

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Published in:PloS one 2016-01, Vol.11 (1), p.e0145999-e0145999
Main Authors: Weng, Chi-Lun, Tseng, Ying-Chi, Chen, David Yen-Ting, Chen, Chi-Jen, Hsu, Hui-Ling
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Hsu, Hui-Ling
description Application of computed tomography for monitoring intracranial stents is limited because of stent-related artifacts. Our purpose was to evaluate the effect of gemstone spectral imaging on the intracranial stent and stent lumen. In vitro, we scanned Enterprise stent phantom and a stent-cheese complex using the gemstone spectral imaging protocol. Follow-up gemstone spectral images of 15 consecutive patients with placement of Enterprise from January 2013 to September 2014 were also retrospectively reviewed. We used 70-keV, 140-keV, iodine (water), iodine (calcium), and iodine (hydroxyapatite) images to evaluate their effect on the intracranial stent and stent lumen. Two regions of interest were individually placed in stent lumen and adjacent brain tissue. Contrast-to-noise ratio was measured to determine image quality. The maximal diameter of stent markers was also measured to evaluate stent-related artifact. Two radiologists independently graded the visibility of the lumen at the maker location by using a 4-point scale. The mean of grading score, contrast/noise ratio and maximal diameter of stent markers were compared among all modes. All results were analyzed by SPSS version 20. In vitro, iodine (water) images decreased metallic artifact of stent makers to the greatest degree. The most areas of cheese were observed on iodine (water) images. In vivo, iodine (water) images had the smallest average diameter of stent markers (0.33 ± 0.17mm; P < .05) and showed the highest mean grading score (2.94 ± 0.94; P < .05) and contrast/noise ratio of in-stent lumen (160.03 ±37.79; P < .05) among all the modes. Iodine (water) images can help reduce stent-related artifacts of Enterprise and enhance contrast of in-stent lumen. Spectral imaging may be considered a noninvasive modality for following-up patients with in-stent stenosis.
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Our purpose was to evaluate the effect of gemstone spectral imaging on the intracranial stent and stent lumen. In vitro, we scanned Enterprise stent phantom and a stent-cheese complex using the gemstone spectral imaging protocol. Follow-up gemstone spectral images of 15 consecutive patients with placement of Enterprise from January 2013 to September 2014 were also retrospectively reviewed. We used 70-keV, 140-keV, iodine (water), iodine (calcium), and iodine (hydroxyapatite) images to evaluate their effect on the intracranial stent and stent lumen. Two regions of interest were individually placed in stent lumen and adjacent brain tissue. Contrast-to-noise ratio was measured to determine image quality. The maximal diameter of stent markers was also measured to evaluate stent-related artifact. Two radiologists independently graded the visibility of the lumen at the maker location by using a 4-point scale. The mean of grading score, contrast/noise ratio and maximal diameter of stent markers were compared among all modes. All results were analyzed by SPSS version 20. In vitro, iodine (water) images decreased metallic artifact of stent makers to the greatest degree. The most areas of cheese were observed on iodine (water) images. In vivo, iodine (water) images had the smallest average diameter of stent markers (0.33 ± 0.17mm; P &lt; .05) and showed the highest mean grading score (2.94 ± 0.94; P &lt; .05) and contrast/noise ratio of in-stent lumen (160.03 ±37.79; P &lt; .05) among all the modes. Iodine (water) images can help reduce stent-related artifacts of Enterprise and enhance contrast of in-stent lumen. Spectral imaging may be considered a noninvasive modality for following-up patients with in-stent stenosis.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>26731534</pmid><doi>10.1371/journal.pone.0145999</doi><oa>free_for_read</oa></addata></record>
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issn 1932-6203
1932-6203
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source Publicly Available Content Database (Proquest) (PQ_SDU_P3); PubMed Central(OpenAccess)
subjects Aged
Aneurysms
Angioplasty
Atherosclerosis
Brain
Brain - blood supply
Calcium
Care and treatment
Cerebrovascular disorders
Cheese
Computed tomography
Contrast Media - analysis
Coronary Angiography - methods
Dairy products
Energy
Evaluation
Female
Grading
Hospitals
Humans
Hydroxyapatite
Hydroxyapatites
Image contrast
Image enhancement
Image quality
Implants
In vitro methods and tests
Iodine
Iodine - analysis
Male
Markers
Medical imaging
Medicine
Middle Aged
Neuroimaging
Noise
Patients
Review boards
Risk factors
Spectra
Spectroscopy
Stenosis
Stents
Stroke
Surgical implants
Tomography, X-Ray Computed - methods
title Spectral Imaging for Intracranial Stents and Stent Lumen
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