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  1. Book ; Online: Common Artifacts in Volume Rendering

    Ruijters, Daniel

    2021  

    Abstract: Direct Volume Rendering is a popular and powerful visualization method for voxel data and other volumetric scalar data sets. Particularly, in medical applications volume rendering is very commonly used, and has become one of the state of the art methods ... ...

    Abstract Direct Volume Rendering is a popular and powerful visualization method for voxel data and other volumetric scalar data sets. Particularly, in medical applications volume rendering is very commonly used, and has become one of the state of the art methods for 3D visualization of medical data. In this article, some of the most common artifacts encountered will be discussed, and their possible remedies.

    Comment: 10 pages, 5 figures, 2 tables
    Keywords Computer Science - Graphics ; I.3.7
    Publishing date 2021-09-28
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Dynamic (live) 3D roadmap as navigational tool in multiplug brain arteriovenous malformation embolization: technical note.

    R, Bibi Sadaqat / Korkmazer, Bora / Süleyman, Kanullah / Hikmat, Emil / Kocer, Naci / Islak, Civan / Tureci, Ercan / Ruijters, Daniel / Kizilkilic, Osman

    Neuroradiology

    2023  Volume 66, Issue 1, Page(s) 129–133

    Abstract: Purpose: Treatment of brain arteriovenous malformation (bAVM) includes microsurgical excision, stereotactic radiosurgery, endovascular embolization, or combination. With bAVM embolization, complete angiographic obliteration ranges from 12.5 to 51%, and ... ...

    Abstract Purpose: Treatment of brain arteriovenous malformation (bAVM) includes microsurgical excision, stereotactic radiosurgery, endovascular embolization, or combination. With bAVM embolization, complete angiographic obliteration ranges from 12.5 to 51%, and higher total occlusion rate is seen in SM grades I to III, ranging from 96 to 100%.
    Methods: In this paper, we illustrate the use of 3D rotational angiography and dynamic (live) 3D roadmap functions in endovascular treatment of bAVM. A single dynamic 3D roadmap or two dynamic 3D roadmaps obtained help tremendously in navigation of microcatheters and wires along the parent artery and bAVM feeders.
    Results: This method eliminates the need for repeated 2D angiograms and roadmaps for new working projections every time the C-arm position is changed for cannulation of different feeders, thereby reducing radiation dose. No instances of misalignment error, vascular perforation, or thromboembolic phenomena were observed in the 21 embolization cases performed within the previous 2 years while utilizing this feature.
    Conclusion: The dynamic 3D roadmap is an extremely useful tool for multiple-feeder cannulation, by reducing the use of multiple 2D angiograms, providing intraprocedural live and adjustable 3D roadmap for better mental orientation to angioarchitecture of the bAVM, which further aids in the overall complete angiographic obliteration rate of bAVM in a single session especially in multiplug embolization technique.
    MeSH term(s) Humans ; Intracranial Arteriovenous Malformations/diagnostic imaging ; Intracranial Arteriovenous Malformations/therapy ; Brain ; Embolization, Therapeutic/methods ; Cerebral Angiography/methods ; Catheterization ; Radiosurgery ; Treatment Outcome ; Retrospective Studies
    Language English
    Publishing date 2023-11-23
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 123305-1
    ISSN 1432-1920 ; 0028-3940
    ISSN (online) 1432-1920
    ISSN 0028-3940
    DOI 10.1007/s00234-023-03250-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: A technical note on intra-arterial cone-beam computed tomography for the evaluation of flow-diverter stents: Image quality differences between diluted and non-diluted contrast medium.

    Kocer, Naci / Kandemirli, Sedat G / Ruijters, Daniel / Mantatzis, Michalis / Kizilkilic, Osman / Islak, Civan

    Interventional neuroradiology : journal of peritherapeutic neuroradiology, surgical procedures and related neurosciences

    2019  Volume 26, Issue 2, Page(s) 164–169

    Abstract: Background: Design of flow-diverter stents for flexibility, tractability, and low profile limits their radiopacity on conventional digital subtraction angiography. Cone-beam computed tomography (CBCT) offers higher spatial resolution for the evaluation ... ...

    Abstract Background: Design of flow-diverter stents for flexibility, tractability, and low profile limits their radiopacity on conventional digital subtraction angiography. Cone-beam computed tomography (CBCT) offers higher spatial resolution for the evaluation of flow-diverter stents. However, CBCT requires optimal dilution and timing of contrast medium for simultaneous visualization of the stent, arterial lumen, and vessel wall. There are only limited data on the effects of different contrast dilutions on CBCT image quality in neurointerventional applications.
    Materials and methods: In our institution, intra-arterial CBCTs were acquired during stent deployment and at follow-ups with 10% diluted contrast. We had recently started acquiring intra-arterial CBCTs with non-diluted contrast. Retrospective analysis of our flow-diverter data identified eight cases with different aneurysm locations who had intra-arterial CBCT with 10% diluted contrast immediately after flow-diverter stent deployment and with non-diluted contrast technique during follow-ups. For each case, the image quality between diluted and non-diluted contrast techniques was compared qualitatively by assessing stent visualization and quantitatively by plotting gray-scale intensity values along the vessel lumen.
    Results: In two sets of CBCT images per each case, there was no substantial difference between diluted and non-diluted CBTC techniques for the evaluation of stent architecture and lumen opacification. Gray-scale intensity values perpendicular to the lumen revealed similar intensity values along the neighboring parenchyma, vessel wall, and lumen for the two different contrast techniques.
    Conclusion: Intra-arterial CBCT angiography can be performed without contrast dilution and still achieve adequate image quality in certain cerebral aneurysms treated with flow diverter. The non-diluted contrast technique avoids the time loss during preparation of diluted contrast and installation of diluted contrast to the injector in angiography suites with a single power injector.
    MeSH term(s) Angiography, Digital Subtraction ; Cerebral Angiography ; Cerebral Arteries/diagnostic imaging ; Cerebral Arteries/surgery ; Computed Tomography Angiography ; Cone-Beam Computed Tomography/methods ; Contrast Media ; Humans ; Image Processing, Computer-Assisted ; Retrospective Studies ; Stents ; Treatment Outcome
    Chemical Substances Contrast Media
    Language English
    Publishing date 2019-11-25
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1354913-3
    ISSN 2385-2011 ; 1591-0199 ; 1123-9344
    ISSN (online) 2385-2011
    ISSN 1591-0199 ; 1123-9344
    DOI 10.1177/1591019919890929
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: A Hidden Markov Model for 3D Catheter Tip Tracking With 2D X-ray Catheterization Sequence and 3D Rotational Angiography.

    Ambrosini, Pierre / Smal, Ihor / Ruijters, Daniel / Niessen, Wiro J / Moelker, Adriaan / Van Walsum, Theo

    IEEE transactions on medical imaging

    2017  Volume 36, Issue 3, Page(s) 757–768

    Abstract: In minimal invasive image guided catheterization procedures, physicians require information of the catheter position with respect to the patient's vasculature. However, in fluoroscopic images, visualization of the vasculature requires toxic contrast ... ...

    Abstract In minimal invasive image guided catheterization procedures, physicians require information of the catheter position with respect to the patient's vasculature. However, in fluoroscopic images, visualization of the vasculature requires toxic contrast agent. Static vasculature roadmapping, which can reduce the usage of iodine contrast, is hampered by the breathing motion in abdominal catheterization. In this paper, we propose a method to track the catheter tip inside the patient's 3D vessel tree using intra-operative single-plane 2D X-ray image sequences and a peri-operative 3D rotational angiography (3DRA). The method is based on a hidden Markov model (HMM) where states of the model are the possible positions of the catheter tip inside the 3D vessel tree. The transitions from state to state model the probabilities for the catheter tip to move from one position to another. The HMM is updated following the observation scores, based on the registration between the 2D catheter centerline extracted from the 2D X-ray image, and the 2D projection of 3D vessel tree centerline extracted from the 3DRA. The method is extensively evaluated on simulated and clinical datasets acquired during liver abdominal catheterization. The evaluations show a median 3D tip tracking error of 2.3 mm with optimal settings in simulated data. The registered vessels close to the tip have a median distance error of 4.7 mm with angiographic data and optimal settings. Such accuracy is sufficient to help the physicians with an up-to-date roadmapping. The method tracks in real-time the catheter tip and enables roadmapping during catheterization procedures.
    MeSH term(s) Algorithms ; Angiography/methods ; Catheters ; Computer Simulation ; Humans ; Imaging, Three-Dimensional/methods ; Markov Chains ; Radiographic Image Enhancement/methods
    Language English
    Publishing date 2017-03
    Publishing country United States
    Document type Journal Article
    ZDB-ID 622531-7
    ISSN 1558-254X ; 0278-0062
    ISSN (online) 1558-254X
    ISSN 0278-0062
    DOI 10.1109/TMI.2016.2625811
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Continuous roadmapping in liver TACE procedures using 2D-3D catheter-based registration.

    Ambrosini, Pierre / Ruijters, Daniel / Niessen, Wiro J / Moelker, Adriaan / van Walsum, Theo

    International journal of computer assisted radiology and surgery

    2015  Volume 10, Issue 9, Page(s) 1357–1370

    Abstract: Purpose: Fusion of pre/perioperative images and intra-operative images may add relevant information during image-guided procedures. In abdominal procedures, respiratory motion changes the position of organs, and thus accurate image guidance requires a ... ...

    Abstract Purpose: Fusion of pre/perioperative images and intra-operative images may add relevant information during image-guided procedures. In abdominal procedures, respiratory motion changes the position of organs, and thus accurate image guidance requires a continuous update of the spatial alignment of the (pre/perioperative) information with the organ position during the intervention.
    Methods: In this paper, we propose a method to register in real time perioperative 3D rotational angiography images (3DRA) to intra-operative single-plane 2D fluoroscopic images for improved guidance in TACE interventions. The method uses the shape of 3D vessels extracted from the 3DRA and the 2D catheter shape extracted from fluoroscopy. First, the appropriate 3D vessel is selected from the complete vascular tree using a shape similarity metric. Subsequently, the catheter is registered to this vessel, and the 3DRA is visualized based on the registration results. The method is evaluated on simulated data and clinical data.
    Results: The first selected vessel, ranked with the shape similarity metric, is used more than 39 % in the final registration and the second more than 21 %. The median of the closest corresponding points distance between 2D angiography vessels and projected 3D vessels is 4.7-5.4 mm when using the brute force optimizer and 5.2-6.6 mm when using the Powell optimizer.
    Conclusion: We present a catheter-based registration method to continuously fuse a 3DRA roadmap arterial tree onto 2D fluoroscopic images with an efficient shape similarity.
    MeSH term(s) Algorithms ; Angiography ; Automation ; Carcinoma, Hepatocellular/therapy ; Catheterization ; Catheters ; Chemoembolization, Therapeutic/instrumentation ; Chemoembolization, Therapeutic/methods ; Computer Simulation ; Contrast Media/chemistry ; Fluoroscopy/methods ; Humans ; Image Processing, Computer-Assisted/methods ; Imaging, Three-Dimensional/methods ; Liver Neoplasms/therapy ; Models, Statistical ; Motion ; Respiration ; Retrospective Studies
    Chemical Substances Contrast Media
    Language English
    Publishing date 2015-09
    Publishing country Germany
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2365628-1
    ISSN 1861-6429 ; 1861-6410
    ISSN (online) 1861-6429
    ISSN 1861-6410
    DOI 10.1007/s11548-015-1218-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Coronary computed tomographic angiography in the cardiac catheterization laboratory: current applications and future developments.

    Wink, Onno / Hecht, Harvey S / Ruijters, Daniel

    Cardiology clinics

    2009  Volume 27, Issue 3, Page(s) 513–529

    Abstract: The last few years have seen a marked increase in the number of cardiac CT scans performed, regardless of reimbursement issues and concerns about radiation dose. New-generation multidetector CT (MDCT) scanners with wide craniocaudal coverage (256 slices ... ...

    Abstract The last few years have seen a marked increase in the number of cardiac CT scans performed, regardless of reimbursement issues and concerns about radiation dose. New-generation multidetector CT (MDCT) scanners with wide craniocaudal coverage (256 slices and beyond) have the potential to further improve diagnostic capability compared with that of the existing generation of MDCT scanners. New dose-reduction technologies are now available on these scanners, enabling high-quality coronary imaging with a significant reduction in radiation dose. This article addresses some of these advances and discusses how cardiac CT and its derived information can be used in the preparation and execution of catheter coronary angiography and percutaneous coronary interventions.
    MeSH term(s) Aged ; Aged, 80 and over ; Algorithms ; Cardiac Catheterization ; Coronary Angiography/trends ; Coronary Disease/diagnostic imaging ; Coronary Restenosis/diagnostic imaging ; Female ; Forecasting ; Humans ; Image Processing, Computer-Assisted ; Male ; Middle Aged ; Predictive Value of Tests ; Radiographic Image Enhancement ; Radiography, Interventional ; Sensitivity and Specificity ; Stents ; Tomography, X-Ray Computed
    Language English
    Publishing date 2009-08
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 1196385-2
    ISSN 1558-2264 ; 0733-8651
    ISSN (online) 1558-2264
    ISSN 0733-8651
    DOI 10.1016/j.ccl.2009.04.002
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: GPU-accelerated elastic 3D image registration for intra-surgical applications.

    Ruijters, Daniel / ter Haar Romeny, Bart M / Suetens, Paul

    Computer methods and programs in biomedicine

    2011  Volume 103, Issue 2, Page(s) 104–112

    Abstract: Local motion within intra-patient biomedical images can be compensated by using elastic image registration. The application of B-spline based elastic registration during interventional treatment is seriously hampered by its considerable computation time. ...

    Abstract Local motion within intra-patient biomedical images can be compensated by using elastic image registration. The application of B-spline based elastic registration during interventional treatment is seriously hampered by its considerable computation time. The graphics processing unit (GPU) can be used to accelerate the calculation of such elastic registrations by using its parallel processing power, and by employing the hardwired tri-linear interpolation capabilities in order to efficiently perform the cubic B-spline evaluation. In this article it is shown that the similarity measure and its derivatives also can be calculated on the GPU, using a two pass approach. On average a speedup factor 50 compared to a straight-forward CPU implementation was reached.
    MeSH term(s) Algorithms ; Computer Graphics ; Humans ; Imaging, Three-Dimensional/methods ; Radiographic Image Interpretation, Computer-Assisted/methods ; Surgery, Computer-Assisted/methods
    Language English
    Publishing date 2011-08
    Publishing country Ireland
    Document type Journal Article
    ZDB-ID 632564-6
    ISSN 1872-7565 ; 0169-2607
    ISSN (online) 1872-7565
    ISSN 0169-2607
    DOI 10.1016/j.cmpb.2010.08.014
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Volumetric Measurements of Brain Shift Using Intraoperative Cone-Beam Computed Tomography: Preliminary Study.

    Pereira, Vitor Mendes / Smit-Ockeloen, Iris / Brina, Olivier / Babic, Drazenko / Breeuwer, Marcel / Schaller, Karl / Lovblad, Karl-Olof / Ruijters, Daniel

    Operative neurosurgery (Hagerstown, Md.)

    2016  Volume 12, Issue 1, Page(s) 4–13

    Abstract: Background: Cerebrospinal fluid leakage and ventricular compression during open surgery may lead to brain deformation called brain shift. Brain shift may affect intraoperative navigation that is based on image-based preoperative planning. Tools to ... ...

    Abstract Background: Cerebrospinal fluid leakage and ventricular compression during open surgery may lead to brain deformation called brain shift. Brain shift may affect intraoperative navigation that is based on image-based preoperative planning. Tools to correct or predict these anatomic modifications can be important to maintain precision during open guided neurosurgery.
    Objective: To obtain a reliable intraoperative volumetric deformation vector field describing brain shift during intracranial neurosurgical procedures.
    Methods: We acquired preoperative and intraoperative cone-beam computed tomography enhanced with intravenous injection of iodine contrast. These data sets were preprocessed and elastically registered to obtain the volumetric brain shift deformation vector fields.
    Results: We obtained the brain shift deformation vector field in 9 cases. The deformation fields proved to be highly nonlinear, particularly around the ventricles. Interpatient variability was considerable, with a maximum deformation ranging from 8.1 to 26.6 mm and a standard deviation ranging from 0.9 to 4.9 mm.
    Conclusion: Contrast-enhanced cone-beam computed tomography provides a feasible technique for intraoperatively determining brain shift deformation vector fields. This technique can be used perioperatively to adjust preoperative planning and coregistration during neurosurgical procedures.
    Language English
    Publishing date 2016-03-01
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2767575-0
    ISSN 2332-4260 ; 2332-4252
    ISSN (online) 2332-4260
    ISSN 2332-4252
    DOI 10.1227/NEU.0000000000000999
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Vesselness-based 2D-3D registration of the coronary arteries.

    Ruijters, Daniel / ter Haar Romeny, Bart M / Suetens, Paul

    International journal of computer assisted radiology and surgery

    2009  Volume 4, Issue 4, Page(s) 391–397

    Abstract: Purpose: Robust and accurate automated co-registration of the coronary arteries in 3D CTA and 2D X-ray angiography during percutaneous coronary interventions (PCI), in order to present a fused visualization.: Methods: A novel vesselness-based ... ...

    Abstract Purpose: Robust and accurate automated co-registration of the coronary arteries in 3D CTA and 2D X-ray angiography during percutaneous coronary interventions (PCI), in order to present a fused visualization.
    Methods: A novel vesselness-based similarity measure was developed, that avoids an explicit segmentation of the X-ray image. A stochastic optimizer searches the optimal registration using the similarity measure.
    Results: Both simulated data and clinical data were used to investigate the accuracy and capture range of the proposed method. The experiments show that the proposed method outperforms the iterative closest point method in terms of accuracy (average residual error of 0.42 mm vs. 1.44 mm) and capture range (average 71.1 mm/20.3 degrees vs. 14.1 mm/5.2 degrees ).
    Conclusion: The proposed method has proven to be accurate and the capture range is ample for usage in PCI. Especially the absence of an explicit segmentation of the interventionally acquired X-ray images considerably aids the robustness of the method.
    MeSH term(s) Algorithms ; Chronic Disease ; Coronary Angiography/methods ; Coronary Stenosis/diagnostic imaging ; Diagnosis, Differential ; Humans ; Imaging, Three-Dimensional/methods ; Phantoms, Imaging ; Reproducibility of Results
    Language English
    Publishing date 2009-05-07
    Publishing country Germany
    Document type Comparative Study ; Journal Article
    ZDB-ID 2365628-1
    ISSN 1861-6429 ; 1861-6410
    ISSN (online) 1861-6429
    ISSN 1861-6410
    DOI 10.1007/s11548-009-0316-z
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Validation of 3D multimodality roadmapping in interventional neuroradiology.

    Ruijters, Daniel / Homan, Robert / Mielekamp, Peter / van de Haar, Peter / Babic, Drazenko

    Physics in medicine and biology

    2011  Volume 56, Issue 16, Page(s) 5335–5354

    Abstract: Three-dimensional multimodality roadmapping is entering clinical routine utilization for neuro-vascular treatment. Its purpose is to navigate intra-arterial and intra-venous endovascular devices through complex vascular anatomy by fusing pre-operative ... ...

    Abstract Three-dimensional multimodality roadmapping is entering clinical routine utilization for neuro-vascular treatment. Its purpose is to navigate intra-arterial and intra-venous endovascular devices through complex vascular anatomy by fusing pre-operative computed tomography (CT) or magnetic resonance (MR) with the live fluoroscopy image. The fused image presents the real-time position of the intra-vascular devices together with the patient's 3D vascular morphology and its soft-tissue context. This paper investigates the effectiveness, accuracy, robustness and computation times of the described methods in order to assess their suitability for the intended clinical purpose: accurate interventional navigation. The mutual information-based 3D-3D registration proved to be of sub-voxel accuracy and yielded an average registration error of 0.515 mm and the live machine-based 2D-3D registration delivered an average error of less than 0.2 mm. The capture range of the image-based 3D-3D registration was investigated to characterize its robustness, and yielded an extent of 35 mm and 25° for >80% of the datasets for registration of 3D rotational angiography (3DRA) with CT, and 15 mm and 20° for >80% of the datasets for registration of 3DRA with MR data. The image-based 3D-3D registration could be computed within 8 s, while applying the machine-based 2D-3D registration only took 1.5 µs, which makes them very suitable for interventional use.
    MeSH term(s) Brain/diagnostic imaging ; Fluoroscopy/methods ; Humans ; Imaging, Three-Dimensional/methods ; Phantoms, Imaging ; Time Factors ; Tomography, X-Ray Computed/methods
    Language English
    Publishing date 2011-07-28
    Publishing country England
    Document type Journal Article ; Validation Study
    ZDB-ID 208857-5
    ISSN 1361-6560 ; 0031-9155
    ISSN (online) 1361-6560
    ISSN 0031-9155
    DOI 10.1088/0031-9155/56/16/017
    Database MEDical Literature Analysis and Retrieval System OnLINE

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