Generating of 3D data during neurovascular interventions by using multi-projection imaging

Noël, Peter B.; Hoffmann, Kenneth R.; Walczak, Alan M.; Schaefer, Sebastian; Hanel, Ricardó A.; Wehman, J. Christopher; Levy, Elad I.; Guterman, Lee R.; Hopkins, Nelson L

doi:10.1016/j.ics.2005.03.122

Cited by 3 publications

(4 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An initial set of 3D vessel centerlines are reconstructed by pairing one of the views with each of the other views acquired and applying standard biplane reconstruction algorithms using the gantry information and pairwise epipolar constraints. After these centerlines are computed, their agreement with each other is optimized by iteratively adjusting the gantry information [20]. An average centerline is then obtained from the optimized 3D centerline information.…”

Section: Mvr Techniquementioning

confidence: 99%

Experimental comparison of cone beam CT (CBCT) reconstruction and multiview reconstruction (MVR) for microangiography (MA) detector system

et al. 2006

Self Cite

View full text Add to dashboard Cite

The new Multi-View Reconstruction (MVR) method for generating 3D vascular images was evaluated experimentally. The MVR method requires only a few digital subtraction angiographic (DSA) projections to reconstruct the 3D model of the vessel object compared to 180 or more projections for standard CBCT. Full micro-CBCT datasets of a contrast filled carotid vessel phantom were obtained using a Microangiography (MA) detector. From these datasets, a few projections were selected for use in the MVR technique. Similar projection views were also obtained using a standard x-ray image intensifier (II) system. A comparison of the 2D views of the MVRs (MA and II derived) with reference micro-CBCT data, demonstrated best agreement with the MA MVRs, especially at the curved part of the phantom. Additionally, the full 3D MVRs were compared with the full micro-CBCT 3D reconstruction resulting for the phantom with the smallest diameter (0.75 mm) vessel, in a mean centerline deviation from the micro-CBCT derived reconstructions of 29 μm for the MA MVR and 48 μm for the II MVR. The comparison implies that an MVR may be substituted for a full micro-CBCT scan for evaluating vessel segments with consequent substantial savings in patient exposure and contrast media injection yet without substantial loss in 3D image content. If a high resolution system with MA detector is used, the improved resolution could be well suited for endovascular image guided interventions where visualization of only a small field of view (FOV) is required.

show abstract

Section: Mvr Techniquementioning

confidence: 99%

Experimental comparison of cone beam CT (CBCT) reconstruction and multiview reconstruction (MVR) for microangiography (MA) detector system

et al. 2006

Self Cite

View full text Add to dashboard Cite

show abstract

“…18,19 Note that corresponding centerlines not corresponding points are used in this technique. 15 For the reconstruction, one coordinate system ͑one position of the focal-spot-imagingplane system͒ is chosen as the coordinate system in which the centerline reconstruction will be performed and therefore into which all other coordinate systems will be transformed, i.e., the R's and t's relating each coordinate system to one coordinate system will be determined. We call this coordinate system the common coordinate system.…”

Section: Optimization Of Multiple Angiogramsmentioning

confidence: 99%

“…We too realized early on 14,15 that use of the centerlines instead of bifurcation points had a number of advantages and that multiple views could overcome degeneracies. 13 Thus, we have also developed self-calibrating methods that can overcome the deficiencies of biplane imaging by making use of the multiple views obtained by the clinician during the interventional procedure.…”

Section: Introductionmentioning

confidence: 99%

Optimization of three‐dimensional angiographic data obtained by self‐calibration of multiview imaging

et al. 2006

Self Cite

View full text Add to dashboard Cite

Stroke is one of the leading causes of death in the U.S. The treatment of stroke often involves vascular interventions in which devices are guided to the intervention site often through tortuous vessels based on two-dimensional (2-D) angiographic images. Three dimensional (3-D) vascular information may facilitate these procedures. Methods have been proposed for the self-calibrating determination of 3-D vessel trees from biplane and multiple plane images and the geometric relationships between the views (imaging geometries). For the biplane analysis, four or more corresponding points must be identified in the biplane images. For the multiple view technique, multiple vessels must be indicated and only the translation vectors relating the geometries are calculated. We have developed methods for the calculation of the 3-D vessel data and the full transformations relating the multiple views (rotations and translations) obtained during interventional procedures, and the technique does not require indication of corresponding points, but only the indication of a single vessel, e.g., the vessel of interest. Multiple projection views of vessel trees are obtained and transferred to the analysis computer. The vessel or vessels of interest are indicated by the user. Using the initial imaging geometry determined from the gantry information, 3-D vessel centerlines are calculated using the indicated centerlines in pairs of images. The imaging geometries are then iteratively adjusted and 3-D centerlines recalculated until the root-mean-square (rms) difference between the calculated 3-D centerlines is minimized. Simulations indicate that the 3-D centerlines can be accurately determined (to within 1 mm) even for errors in indication of the vessel endpoints as large as 5 mm. In phantom studies, the average rms difference between the pairwise calculated 3-D centerlines is approximately 7.5 mm prior to refinement (i.e., using the gantry information alone), whereas the average rms difference is usually below 1 mm after refinement. Accuracies and reliabilities of better than 1 mm were also determined by comparing centerlines determined using multiview and rotational angiography reconstruction and clinical data sets. These results indicate that the multiview approach will provide accurate and reliable 3-D centerlines for indicated vessel(s) without increasing the dose to the patient.

show abstract

“…As an illustration of this, multiview 3D reconstruction [4,10] was performed for three projections (60 LAO, 20 RAO, 40 RAO) for the MA and II.…”

Section: Multi-view 3d Reconstructionsmentioning

confidence: 99%

New microangiography system development providing improved small vessel imaging, increased contrast-to-noise ratios, and multiview 3D reconstructions

et al. 2006

Self Cite

View full text Add to dashboard Cite

A new microangiographic system (MA) integrated into a c-arm gantry has been developed allowing precise placement of a MA at the exact same angle as the standard x-ray image intensifier (II) with unchanged source and object position. The MA can also be arbitrarily moved about the object and easily moved into the field of view (FOV) in front of the lower resolution II when higher resolution angiographic sequences are needed. The benefits of this new system are illustrated in a neurovascular study, where a rabbit is injected with contrast media for varying oblique angles. Digital subtraction angiographic (DSA) images were obtained and compared using both the MA and II detectors for the same projection view. Vessels imaged with the MA appear sharper with smaller vessels visualized. Visualization of ~100 μm vessels was possible with the MA whereas not with the II. Further, the MA could better resolve vessel overlap. Contrast to noise ratios (CNR) were calculated for vessels of varying sizes for the MA versus the II and were found to be similar for large vessels, approximately double for medium vessels, and infinitely better for the smallest vessels. In addition, a 3D reconstruction of selected vessel segments was performed, using multiple (three) projections at oblique angles, for each detector. This new MA/II integrated system should lead to improved diagnosis and image guidance of neurovascular interventions by enabling initial guidance with the low resolution large FOV II combined with use of the high resolution MA during critical parts of diagnostic and interventional procedures.

show abstract

Generating of 3D data during neurovascular interventions by using multi-projection imaging

Cited by 3 publications

References 11 publications

Experimental comparison of cone beam CT (CBCT) reconstruction and multiview reconstruction (MVR) for microangiography (MA) detector system

Experimental comparison of cone beam CT (CBCT) reconstruction and multiview reconstruction (MVR) for microangiography (MA) detector system

Optimization of three‐dimensional angiographic data obtained by self‐calibration of multiview imaging

New microangiography system development providing improved small vessel imaging, increased contrast-to-noise ratios, and multiview 3D reconstructions

Contact Info

Product

Resources

About