3D-Rotational angiography (Dyna-CT) for mitral valve imaging in an acute animal model

2012 ◽  
Vol 60 (S 01) ◽  
Author(s):  
P Kiefer ◽  
M Vollroth ◽  
T Noack ◽  
M Höbartner ◽  
A Noettling ◽  
...  
Keyword(s):  
Animal Model ◽  
Mitral Valve ◽  
Rotational Angiography ◽  
3D Rotational Angiography

A comparative study of geometry-based methods and intra-arterial pressure measurements to assess the hemodynamic significance of equivocal iliac artery stenoses

Vascular ◽  
2018 ◽  
Vol 27 (2) ◽  
pp. 119-127
Author(s):  
Stefan GH Heinen ◽  
Wouter Huberts ◽  
Daniel AF van den Heuvel ◽  
Frans N van de Vosse ◽  
Jean-Paul PM de Vries ◽  
...  
Keyword(s):  
Peripheral Arterial Disease ◽  
Iliac Artery ◽  
Visual Inspection ◽  
Arterial Disease ◽  
Lumen Diameter ◽  
Pressure Measurements ◽  
Rotational Angiography ◽  
3D Rotational Angiography ◽  
Peripheral Arterial ◽  
Diameter Reduction

Objectives To date, the ultimate decision to treat iliac artery stenoses in patients suffering from symptomatic peripheral arterial disease is based on the patient’s symptoms and on visual inspection of angiographical images. The primary aim of this study was to investigate the accuracy of geometry-based methods (i.e. visual inspection and quantitative vascular analysis (Viewforum version R7.2v1 Advanced vessel analysis, Philips Healthcare, Best, The Netherlands) of 3D rotational angiography) to identify the severity of equivocal iliac artery stenosis in peripheral arterial disease patients with intra-arterial hyperemic pressure measurements (gold standard) as a reference. Methods Twenty patients with symptomatic iliac artery stenoses were subjected to 3D rotational angiography. Intra-arterial pressure measurements under hyperemic conditions were performed across 24 visually identified iliac artery stenoses. Three experienced interventional-radiologists retrospectively estimated the lumen diameter reduction by visual inspection. Furthermore, quantitative vascular analysis was performed on the 3D rotational angiography data. Geometry-based estimates were classified into two groups: lumen diameter reduction of <50% (non-significant) and diameter reduction [Formula: see text]50% (significant), and compared to the intra-arterial hyperemic pressure gradients. A stenosis causing a pressure gradient (Δp) ≥10 mmHg was considered hemodynamically significant. Results Visual inspection and quantitative vascular analysis correctly identified hemodynamically significant stenoses in, respectively, 83% and 67% of the 24 iliac artery stenoses. Quantitative vascular analysis-based identification of hemodynamic significant stenoses (Δp ≥ 10 mmHg) could be optimized by lowering the threshold to a 42% lumen diameter reduction which improved the accuracy from 67% to 83%. Conclusions Visual inspection of 3D rotational angiography by experienced interventional-radiologists has an 83% accuracy to identify hemodynamic significant iliac artery stenoses (Δ p ≥10 mmHg). The use of quantitative vascular analysis software did not improve accuracy.

scholarly journals Low-Dose 3D Rotational Angiography in Measuring the Size of Intracranial Aneurysm: In Vitro Feasibility Study Using Aneurysm Phantom

2021 ◽  
Vol 16 (1) ◽  
pp. 59-63
Author(s):  
Hee Jong Ki ◽  
Bum-soo Kim ◽  
Jun-Ki Kim ◽  
Jai Ho Choi ◽  
Yong Sam Shin ◽  
...  
Keyword(s):  
Intracranial Aneurysm ◽  
Endovascular Treatment ◽  
Low Dose ◽  
Three Dimensional ◽  
3D Measurement ◽  
Rotational Angiography ◽  
3D Rotational Angiography ◽  
Conventional Dose ◽  
Noninferiority Margin

Purpose: Three-dimensional (3D) measurement of intracranial aneurysms is important in planning endovascular treatment, and 3D rotational angiography (RA) is effective in accurate measurement. The purpose of this study was to evaluate the feasibility of low dose 3D RA (5 seconds 0.10 μGy/frame) in measuring an intracranial aneurysm using an in vitro phantom.Materials and Methods: We investigated an <I>in vitro</i> 3D phantom of an intracranial aneurysm with 10 acquisitions of 3D RA with a conventional dose (5 seconds 0.36 μGy/frame) and 10 acquisitions with a low-dose (5 seconds 0.10 μGy/frame). 3D size and neck diameters of the aneurysm were measured and compared between the 2 groups (conventional and low-dose) using noninferiority statistics.Results: The aneurysm measurements were well-correlated between the 2 readers, and noninferiority in the measurement of aneurysmal size of low-dose 3D RA was demonstrated, as the upper margin of the 1-sided 97.5% confidence interval did not cross the pre-defined noninferiority margin of 0.2 mm by the 2 readers.Conclusion: Low-dose (5 seconds 0.10 μGy/frame) cerebral 3D RA is technically feasible and not inferior in in vitro 3D measurement of an intracranial aneurysm. Thus, low-dose 3D RA is promising and needs further evaluation for its clinical utility in the planning of endovascular treatment of an intracranial aneurysm.

Novel phantom for performance evaluation of contrast-enhanced 3D rotational angiography

2021 ◽  
Vol 90 ◽  
pp. 91-98
Author(s):  
L.E. Lubis ◽  
R.A. Basith ◽  
I. Hariyati ◽  
D. Ryangga ◽  
T. Mart ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Rotational Angiography ◽  
3D Rotational Angiography ◽  
Contrast Enhanced

scholarly journals 3D Rotational Angiography: Recent Experience in the Evaluation of Cerebral Aneurysms for Treatment

2000 ◽  
Vol 6 (2) ◽  
pp. 85-94 ◽  
Author(s):  
S. Ishihara ◽  
I.B. Ross ◽  
M. Piotin ◽  
A. Weill ◽  
H. Aerts ◽  
...  
Keyword(s):  
Decision Making ◽  
Surgical Treatment ◽  
Endovascular Treatment ◽  
Three Dimensional ◽  
Cerebral Aneurysms ◽  
Early Experience ◽  
Recent Experience ◽  
Rotational Angiography ◽  
3D Images ◽  
3D Rotational Angiography

Three dimensional (3D) reconstruction techniques providing volume rendered 3D images from rotational angiography data now exist. We report the design and early experience with one such system. 237 aneurysms were studied. Information was obtained on the morphology of the aneurysm itself and the vascular architecture in and around the aneurysm. 218 (92%) aneurysms went on to have endovascular treatment. The 3D images provided valuable information on aneurysmal anatomy, including relationships with the parent and adjacent vessels. This technique allowed fast and safe decision-making regarding the feasibility of endovascular or surgical treatment and provided useful information for performing the chosen treatment.

Image-guided vascular neurosurgery based on three-dimensional rotational angiography

2007 ◽  
Vol 106 (3) ◽  
pp. 501-506 ◽  
Author(s):  
Peter W. A. Willems ◽  
Theo Van Walsum ◽  
Peter A. Woerdeman ◽  
Everine B. Van De Kraats ◽  
Gerard A. P. De Kort ◽  
...  
Keyword(s):  
Image Registration ◽  
Navigation System ◽  
Three Dimensional ◽  
Region Of Interest ◽  
Small Region ◽  
Rotational Angiography ◽  
Vascular Tree ◽  
Data Set ◽  
3D Rotational Angiography ◽  
Vascular Neurosurgery

✓Three-dimensional rotational angiography is capable of exquisite visualization of cerebral blood vessels and their pathophysiology. Unfortunately, images obtained using this modality typically show a small region of interest without exterior landmarks to allow patient-to-image registration, precluding their use for neuronavigation purposes. The aim of this study was to find an alternative technique to enable 3D rotational angiography–guided vascular neurosurgery. Three-dimensional rotational angiograms were obtained in an angiographic suite with direct navigation capabilities. After image acquisition, a navigated pointer was used to touch fiducial positions on the patient's head. These positions were located outside the image volume but could nevertheless be transformed into image coordinates and stored in the navigation system. Prior to surgery, the data set was transferred to the navigation system in the operating room, and the same fiducial positions were touched again to complete the patient-to-image registration. This technique was tested on a Perspex phantom representing the cerebral vascular tree and on two patients with an intracranial aneurysm. In both the phantom and patients, the neuronavigation system provided 3D images representing the vascular tree in its correct orientation, that is, the orientation seen by the neurosurgeon through the microscope. In one patient, tissue shift was clearly observed without significant changes in the orientation of the structures. Results in this study demonstrate the feasibility of using 3D rotational angiography data sets for neuronavigation purposes. Determining the benefit of this type of navigation should be the subject of future studies.

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