Dual-Source CT Angiography of Peripheral Arterial Stents: In Vitro Evaluation of 22 Different Stent Types

Köhler, Michael; Burg, Matthias C.; Bunck, Alexander C.; Heindel, Walter; Seifarth, Harald; Maintz, David

doi:10.1155/2011/103873

Cited by 13 publications

(8 citation statements)

References 24 publications

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“…Our results regarding the Cheatham Platinum, i.e. the association with a worse but still diagnostic image quality, are in agreement with the in vitro study by Köhler et al [ 19 ], who evaluated 22 different types of peripheral artery stents with CT angiography. A poorer image quality was reported for the platinum-iridium and tantalum stents due to blooming artefacts.…”

Section: Discussionsupporting

confidence: 92%

“…A poorer image quality was reported for the platinum-iridium and tantalum stents due to blooming artefacts. They attributed this to the higher atomic number of platinum (78) and tantalum (73) compared to cobalt (27), steel (26) and chromium (24) [ 19 ]. Other factors which might have an effect on image quality besides the stent material are the stent diameter, strut design and acquisition parameters.…”

Section: Discussionmentioning

confidence: 99%

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Computed tomography image quality of aortic stents in patients with aortic coarctation: a multicentre evaluation

et al. 2018

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BackgroundStents are commonly used to treat aortic coarctation. The objective of this study was to evaluate the post-implantation computed tomography (CT) image quality of different stent types used to treat aortic coarctation.MethodsAdult and paediatric patients with stent-treated aortic coarctation who underwent contrast-enhanced CT were retrospectively included from three tertiary care centres. CT scans were subjectively scored for image quality using a 4-point scale (1 = unacceptable; 2 = poor; 3 = good; 4 = excellent). Furthermore, the amount of stent-induced blooming artefacts was measured as the percentage of the difference between outer and inner stent diameters over the outer stent diameter.ResultsA total of 35 children and 34 adults implanted with 71 stents of six different types were included. The most commonly used stent type was the Cheatham Platinum stent (52 stents, 73%). The subjective image quality of the Cheatham Platinum stents was moderate with a score of 2.0±0.8 (mean ± standard deviation) in children and 2.3±0.6 in adults. The image quality in patients with Formula stents was 2.3±1.2. The Cheatham Platinum stents induced 34–48% blooming, the Formula stents 44–55%. The image quality in patients with the less commonly used Atrium Advanta V12, IntraStent, AndraStent and Palmaz stents was scored 3 (good) to 4 (excellent) with less blooming. The electrocardiographic gating and tube voltage (kVp) did not affect image quality.ConclusionsThere is a substantial variation in CT image quality and blooming artefacts for different stent types used to treat aortic coarctation.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Computed tomography image quality of aortic stents in patients with aortic coarctation: a multicentre evaluation

et al. 2018

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“…The contrast medium was diluted with normal saline to reach the attenuation of 250 Hounsfield unit (HU), which is the acceptable CT attenuation in peripheral CT angiography. The contrast medium was injected into the simulated arteries, which were sealed at both ends [ 28 ].…”

Section: Methodsmentioning

confidence: 99%

Optimal Scanning Protocols for Dual-Energy CT Angiography in Peripheral Arterial Stents: An in Vitro Phantom Study

Almutairi

Sun

Safran

et al. 2015

IJMS

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Objective: To identify the optimal dual-energy computed tomography (DECT) scanning protocol for peripheral arterial stents while achieving a low radiation dose, while still maintaining diagnostic image quality, as determined by an in vitro phantom study. Methods: Dual-energy scans in monochromatic spectral imaging mode were performed on a peripheral arterial phantom with use of three gemstone spectral imaging (GSI) protocols, three pitch values, and four kiloelectron volts (keV) ranges. A total of 15 stents of different sizes, materials, and designs were deployed in the phantom. Image noise, the signal-to-noise ratio (SNR), different levels of adaptive statistical iterative reconstruction (ASIR), and the four levels of monochromatic energy for DECT imaging of peripheral arterial stents were measured and compared to determine the optimal protocols. Results: A total of 36 scans with 180 datasets were reconstructed from a combination of different protocols. There was a significant reduction of image noise with a higher SNR from monochromatic energy images between 65 and 70 keV in all investigated preset GSI protocols (p < 0.05). In addition, significant effects were found from the main effect analysis for these factors: GSI, pitch, and keV (p = 0.001). In contrast, there was significant interaction on the unstented area between GSI and ASIR (p = 0.015) and a very high significant difference between keV and ASIR (p < 0.001). A radiation dose reduction of 50% was achieved. Conclusions: The optimal scanning protocol and energy level in the phantom study were GSI-48, pitch value 0.984, and 65 keV, which resulted in lower image noise and a lower radiation dose, but with acceptable diagnostic images.

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“…However, the artefact produced by platinum stents is more pronounced in CT, making assessment of the stents difficult [64]. Thus it is important to note the types of stents that have been used in these patients.…”

Section: Vascular Stent Patencymentioning

confidence: 99%

Role of cardiac MRI and CT in Fontan circulation

Yeong

Loughborough

Hamilton

et al. 2017

J Congenit Heart Dis

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A Fontan circulation is a series of palliative surgical procedures, which result in the diversion of the systemic venous return into pulmonary arterial circulation without passing through a ventricle. It is one of the available surgical strategies for patients with cardiac defects that preclude a successful bi-ventricular repair, which encompass a range of complex anatomy. This surgical repair has gone through a series of modifications since the concept was introduced in 1971. Echocardiography remains a vital tool in assessing patients with Fontan circulations but its limitations are well recognised. Cross-sectional imaging modalities such as cardiac MRI and CT are essential components in the systematic clinical evaluation of these patients. The purpose of this review is to understand the information that can be obtained with each cross-sectional modality as well as highlight the challenges that each modality faces.

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Dual-Source CT Angiography of Peripheral Arterial Stents: In Vitro Evaluation of 22 Different Stent Types

Cited by 13 publications

References 24 publications

Computed tomography image quality of aortic stents in patients with aortic coarctation: a multicentre evaluation

Computed tomography image quality of aortic stents in patients with aortic coarctation: a multicentre evaluation

Optimal Scanning Protocols for Dual-Energy CT Angiography in Peripheral Arterial Stents: An in Vitro Phantom Study

Role of cardiac MRI and CT in Fontan circulation

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