Registration of Biplane Angiography and Intravascular Ultrasound for 3D Vessel Reconstruction

2004 ◽  
Vol 43 (04) ◽  
pp. 398-402 ◽  
Author(s):  
M. Wawro ◽  
H. Müller ◽  
C. Wilke ◽  
F. Weichert
Keyword(s):  
Intravascular Ultrasound ◽  
Three Dimensional ◽  
Interventional Treatment ◽  
Alignment Procedure ◽  
Additional Information ◽  
Vascular Brachytherapy ◽  
Computer Based ◽  
Stenotic Arteries ◽  
3D Volume ◽  
Biplane Angiography

Summary Abstract: If planned and applied correctly, intra-vascular brachytherapy (IVB) can significantly reduce the risk of restenosis after interventional treatment of stenotic arteries. Objectives: In order to facilitate computer-based IVB planning, a three-dimensional reconstruction of the stenotic artery based on intravascular ultrasound (IVUS) sequences is desirable. Methods: To attain a 3D reconstruction, the frames of the IVUS sequence are properly aligned in space and completed with additional intermediate frames generated by interpolation. The alignment procedure uses additional information that is obtained from biplane X-ray angiography performed simultaneously during the capturing of the IVUS sequence. After IVUS images and biplane angiography data are acquired from the patient, the vessel-wall borders and the IVUS catheter are detected by an active contour algorithm. Next, the twist between adjacent IVUS frames is determined by a sequential triangulation method combined with stochastic analysis. Results: The above procedure results in a 3D volume-model of the vessel, which also contains information from the IVUS modality. This data is sufficient for computer-based intravascular brachytherapy planning. Conclusion: The proposed methodology can be used to improve the current state-of-the-art IVB treatment planning by enabling computerized dosage computations on a highly accurate 3D model.

scholarly journals Ultrasonographic Signs of Poor Pregnancy Outcome

2017 ◽  
Vol 11 (1) ◽  
pp. 44-58
Author(s):  
Lucía Serrano-González ◽  
María Martinez-Moya ◽  
María Platero-Mihi ◽  
José Bajo-Arenas ◽  
Tirso Perez-Medina
Keyword(s):  
Pregnancy Outcome ◽  
Imaging Techniques ◽  
Three Dimensional ◽  
Normal Pregnancy ◽  
Abdominal Wall Defects ◽  
Crown Rump Length ◽  
Additional Information ◽  
Caudal Regression ◽  
3D Volume ◽  
Poor Pregnancy Outcome

ABSTRACT The frequency of spontaneous abortion, when it is considered from its very beginning, along with the theoretical knowledge of the causes of the abortion, should provide a perspective to the obstetrician that, performing a sonographic exploration finds discoveries that cannot correspond to those characterizing a normal pregnancy. The precocity of the realization of sonographic explorations in the pregnancy will allow diagnosis of many more cases of spontaneous interruptions of the development of pregnancy. New sonographic imaging techniques including three-dimensional (3D) sonography can provide additional information regarding the presence of structural anomalies via 3D volume acquisition, like craniofacial deformities, clefts, neural tube defects, abdominal wall defects, and caudal regression syndrome. It may give further details regarding the timing of embryonic/fetal demise in early pregnancy. Sufficient informational value is regularly obtained in cases having a crown-rump length >8 mm. How to cite this article Serrano-González L, Martinez-Moya M, Platero-Mihi M, Bajo-Arenas J, Perez-Medina T. Ultrasonographic Signs of Poor Pregnancy Outcome. Donald School J Ultrasound Obstet Gynecol 2017;11(1):44-58.

AN INTERACTIVE VIRTUAL INTRACORONARY STENTING SYSTEM BASED ON INTRAVASCULAR ULTRASOUND

2017 ◽  
Vol 17 (07) ◽  
pp. 1740019
Author(s):  
ZHENG SUN ◽  
SIWEN JI
Keyword(s):  
Intravascular Ultrasound ◽  
Three Dimensional ◽  
Vascular Diseases ◽  
Medical Personnel ◽  
Percutaneous Transluminal Coronary Angioplasty ◽  
Interventional Treatment ◽  
Successful Operation ◽  
Stent Expansion ◽  
Transluminal Coronary Angioplasty ◽  
Visual Diagnosis

Percutaneous transluminal coronary angioplasty (PTCA) is a minimally invasive surgery in the clinical treatment of coronary artery diseases. The successful operation highly depends on the size and accurate placement of the stent. In this study, a virtual stenting (VS) system was designed and implemented to facilitate the planning of PTCA. A three-dimensional (3D) vessel model was reconstructed through fusing intravascular ultrasound (IVUS) sequential images and simultaneously recorded X-ray angiograms during cardiac intervention. The user is allowed to intuitively explore the vessel in an endoscopic manner by creating/updating a fly-through trajectory in the lumen. A virtual stent library including a better variety of commercially available bare metal heart stents was built. The user is allowed to select a proper stent according to the morphology of the vessel and lesion and to move it to the lesion. Also, the user can visually observe the stent expansion/apposition and flexibly adjust its position. The system is used to assist visual diagnosis of the vascular diseases, evaluation of interventional treatment and training of the medical personnel.

Early Clinical Experience With Color Three-Dimensional Intravascular Ultrasound in Peripheral Interventions

2001 ◽  
Vol 8 (4) ◽  
pp. 329-338 ◽  
Author(s):  
Khalid Irshad ◽  
Donald B. Reid ◽  
Peter H. Miller ◽  
Raj Velu ◽  
George E. Kopchok ◽  
...  
Keyword(s):  
Intravascular Ultrasound ◽  
Clinical Experience ◽  
Three Dimensional ◽  
Early Clinical Experience

scholarly journals A computer-based approach for developing linamarase inhibitory agents

2020 ◽  
Vol 5 (7) ◽  
Author(s):  
Lucas Paul ◽  
Celestin N. Mudogo ◽  
Kelvin M. Mtei ◽  
Revocatus L. Machunda ◽  
Fidele Ntie-Kang
Keyword(s):  
Structure Elucidation ◽  
Three Dimensional ◽  
Data Bank ◽  
Competitive Inhibitor ◽  
Industrial Applications ◽  
Dimensional Structure ◽  
Full Understanding ◽  
The Poor ◽  
Computer Based ◽  
Inhibitory Agents

AbstractCassava is a strategic crop, especially for developing countries. However, the presence of cyanogenic compounds in cassava products limits the proper nutrients utilization. Due to the poor availability of structure discovery and elucidation in the Protein Data Bank is limiting the full understanding of the enzyme, how to inhibit it and applications in different fields. There is a need to solve the three-dimensional structure (3-D) of linamarase from cassava. The structural elucidation will allow the development of a competitive inhibitor and various industrial applications of the enzyme. The goal of this review is to summarize and present the available 3-D modeling structure of linamarase enzyme using different computational strategies. This approach could help in determining the structure of linamarase and later guide the structure elucidation in silico and experimentally.

scholarly journals 3D-Volume Rendering of the Pelvis with Emphasis on Paraurethral Structures Based on MRI Scans and Comparisons between 3D Slicer and OsiriX®

2021 ◽  
Vol 45 (3) ◽  
Author(s):  
C. M. Durnea ◽  
S. Siddiqi ◽  
D. Nazarian ◽  
G. Munneke ◽  
P. M. Sedgwick ◽  
...  
Keyword(s):  
Image Processing ◽  
Secondary Analysis ◽  
Three Dimensional ◽  
3D Models ◽  
Clinical Role ◽  
Cross Sectional ◽  
3D Slicer ◽  
Mri Scans ◽  
3D Volume ◽  
Good Agreement

AbstractThe feasibility of rendering three dimensional (3D) pelvic models of vaginal, urethral and paraurethral lesions from 2D MRI has been demonstrated previously. To quantitatively compare 3D models using two different image processing applications: 3D Slicer and OsiriX. Secondary analysis and processing of five MRI scan based image sets from female patients aged 29–43 years old with vaginal or paraurethral lesions. Cross sectional image sets were used to create 3D models of the pelvic structures with 3D Slicer and OsiriX image processing applications. The linear dimensions of the models created using the two different methods were compared using Bland-Altman plots. The comparisons demonstrated good agreement between measurements from the two applications. The two data sets obtained from different image processing methods demonstrated good agreement. Both 3D Slicer and OsiriX can be used interchangeably and produce almost similar results. The clinical role of this investigation modality remains to be further evaluated.

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