Dr. Arash Taki email skype

Active Research Projects

Improvement and Automatic Classification of IVUS-VH (Intravascular Ultrasound – Virtual Histology) Images Heart attack and stroke are the major causes of human death and atherosclerotic plaques are the most common effect of cardiovascular disease. Intravascular ultrasound (IVUS), a diagnostic imaging technique, offers a unique view of the morphology of the arterial plaque and displays the morphological and histological properties of a cross-section of the vessel. Limitations of the grayscale IVUS manual plaque assessment have led to the development of quantitative techniques for analysis of characteristics of plaque components. In vivo plaque characterization with the so called Virtual Histology (VH)-IVUS, which is based on the ultrasound RF signal processing, is widely available for atherosclerosis plaque characterization in IVUS images. However, it suffers from a poor longitudinal resolution due to the ECG-gated acquisition. The focus of this PhD work is to provide effective methods for image-based vessel plaque characterization via IVUS image analysis to overcome the limitations of current techniques. The proposed algorithms are also applicable to the large amount of the IVUS image sequences obtained from patients in the past, where there is no access to the corresponding radio frequency(RF) data. Since the proposed method is applicable to all IVUS frames of the heart cycle, therefore it outperforms the longitudinal resolution of the so called VH method.

Research Interests

• Ultrasound Medical Imaging
  
• Interventonal Cardiology Imaging
  
• Patient Monitoring
  
• Bioedical Simulation
  
• Respiratory
  

Books

- A. Taki, A. Kermani, M. Ranjbarnavazi, A. Poormodheji, “Overview of Different Medical Imaging Techniques for the Identification of Coronary Atherosclerotic Plaques”, Book Chapter(Chapter 4), Elsevier “Computing and Visualization for Intravascular Imaging and Computer-Assisted Stenting ”, 2017.

- A. Taki, A. Roodaki, S. Avansari, A. Bigdelou, A. Katouzian, N. Navab, “New Approaches for plaque component analysis in intravascular ultrasound (IVUS) images,” Book Chapter(Chapter 26), Springer, “Multi-Modality Atherosclerosis Imaging and Diagnosis”, 1st Edition, 2014.

- A. Taki, Improvement and automatic classification of IVUS-VH (intravascular ultrasound- Virtual Histology) images. Technical university of Munich2010: 1-162, October 2010, (Ph.D. Thesis).

Journal Papers

- Z. Rezaei, A. Selamat, A. Taki, M.S.M Rahim, M. R.Ab. Kadir, “"Automatic Plaque Segmentation based on hybrid Fuzzy Clustering and k Nearest Neighborhood using Virtual Histology Intravascular Ultrasound Images" Applied Soft Computing, 2017.

- M. Basij, M. Yazdchi, A. Taki, P. Moalem, “An Automatic Approach for Artifacts Detection and Shadow Enhancement in Intra Vascular Ultrasound Images", Signal, Image and Video Processing (SIVP), 2017.

- A.Taki, A. Roodaki, S.K. Setarehdan, S. Avansari, G. Unal, N. Navab, “An IVUS Image-based Approach for Improvement of Coronary Plaque Characterization,” Journal of Computers in Medicine and Biology, Volume: 43, Issue: 4, 2013, pages: 268–280.

- A. Taki, H. Hetterich, A. Roodaki, S.K. Setarehdan, G. Unal, J.Rieber, N. Navab, A. Koenig , “A New Approach for Improving Coronary Plaque Component Analysis based on Intravascular Ultrasound Images, Journal of Ultrasound in Medicine and Biology., vol. 36, no. 8, pp. 1245-1258, August 2010.

- A. Taki, Z. Najafi, A. Roodaki, S.K. Setarehdan, R. Zoroofi, A. Konig, and N. Navab, "Automatic segmentation of calcified plaques and vessel borders in IVUS images", International Journal of Computer Assisted Radiology and Surgery , (2008) 3:347–354, September 2008.

- A.Taki, M.D. Abolhassani, "Ultrasound Two Dimensional Array Transducer Modeling in 3D Imaging" Iranian Journal of Medical Physics, Vol.1, No.2, summer 2003.

Conference Papers

- A. Kermani, A. Ayatollahi, A. Taki, “Coronary Artery Curvature Extraction Using Physic-based Model in Intravascular Ultrasound Image Sequence”, Frames, 23rd National and 1st International Conference in Biomedical Engineering, Tehran Polytechnic, November 2016.

- A. Kermani, A. Ayatollahi, A. Taki, “A Novel Hybrid Biomechanical-Texture based Feature for Detection of High-Risk Atherosclerotic Plaques in Sequential Intravascular Ultrasound Frames”, the 11th International Congress on Coronary Artery Disease – from Prevention to intervention (ICCAD 2015),Florence, Italy, December 2015.

- S. Ghobadi, A. Taki, M. Esmaeili, New Approach to Simulate Operation Rooms based on Medical Devices used in Surgical Procedures, The Second International Conference on Digital Information Processing, Data Mining, and Wireless Communications (DIPDMWC2015), Dubai, UAE, December 2015.

- Z. Rezaei, A. Selamat, A. Taki, M.S.M Rahim, M. R.Ab. Kadir, “Detection of Vulnerable Plaque in Virtual Histology Intravascular Ultrasound Images Using SVM”, 17th International Conference on Systems Science and Engineering (ICCSE 2015), Tokyo, Japan, May 2015.

- A. Kermani, A. Ayatollahi, A. Taki, “Automatic Elimination of Artifacts In Intravascular Ultrasound Images Based on Connected Components of Corresponding Graph”, The 1st Conference of Biomedical Engineering in Cardiovascular Disease, Tehran, January 2015.(Selected as the best article of the conference)

- Z. Rezaei, A. Selamat, A. Taki, M.S.M. Rahim, M.R.A. Kadir, "Extracting Significant Features from Virtual Histology (VH) to Detect Vulnerable Plaque", International Conference on Intelligent Software Methodologies, Tools and Techniques (SOMET_14), Malaysia, September 2014.

- M. Basij, A. Taki, M. Yazdchi, “Automatic Shadow Enhancement in Intravascular Ultrasound (IVUS) Images”, Middle East Conference on Biomedical Engineering (MECBME), Qatar, February 2014.

- M. Basij, M. Yazdchi, P. Moalem, A. Taki, “Border Detection of Shadow Regions in Intravascular Ultrasound (IVUS) Images Using Active Contours”, Iranian Journal of Electrical and Computer Engineering, Volume:11, No.2, January 2014.

- E. Fathi-Azar, S. K. Setarehdan, A. Taki, “Automatic Shadow Region Detection and Enhancement in IVUS Images“, Proceeding of the 6th Iranian Machine Vision Conference(MVIP), pp. 41-45, 2010.

	A. Taki, H.Hetterich, A. Roodaki, S.K. Setarehdan, G. Unal, J.Rieber, N. Navab, A. Konig A new approach for improving coronary plaque component analysis based on intravascular ultrasound images Journal of Ultrasound in Medicine and Biology., vol. 36, no. 8, pp. 1245-1258, August 2010 (bib)
	A. Taki, O. Pauly, S.K. Setarehdan, G. Unal, N. Navab IVUS-based histology of atherosclerotic plaques: improving longitudinal resolution SPIE Medical Imaging, San Diego, California, USA, 13-18 February 2010 (bib)
	A. Taki, M. Maadani, S.K. Setarehdan, A. Roodaki, H.R. Sanaati, N. Navab Detection of atherosclerotic plaque composition using intravascular images Iranian Heart Journal, Fall 2009 (bib)
	A. Taki, A. Bigdelou, A. Roodaki, S.K. Setarehdan, G. Unal, N. Navab A new tool for automated border detection and characterization of atherosclerotic plaque Composition in IVUS Images Computers in Cardiology(CinC? 2009), Park City, Utah,September 13-16, 2009 (bib)
	A. Taki, A. Roodaki, O. Pauly, S.K. Setarehdan, G. Unal, N. Navab A new method for characterization of coronary plaque composition via IVUS images IEEE International Symposium on Biomedical Imaging: From Nano to Macro (ISBI 2009), Boston, Massachusetts, USA, June 28 - July 1, 2009 (bib)
	A. Taki, S. Avansari, A. Roodaki, S.H. Rezatofighi, S.K. Setarehdan, N. Navab Developing new tool for automatic analysis of IVUS images: from border detection to plaque characterization 23nd International Congress and Exhibition June 23 - 27, 2009, Berlin, Germany (bib)
	A. Roodaki, A. Taki, S.K. Setarehdan, N. Navab Modified wavelet transform features for Characterizing different plaque types in IVUS images; A feasibility study 9th International Conference on Signal Processing (ICSP’08) Oct. 26-29 , 2008 , Beijing , CHINA (bib)
	A. Taki, Z.Najafi, A. Roodaki, S.K. Setarehdan, R. Zoroofi, A. Konig, N. Navab Automatic segmentation of calcified plaques and vessel borders in IVUS images International Journal of Computer Assisted Radiology and Surgery(CARS 2008) (bib)
	A. Taki, A. Roodaki, S.K. Setarehdan, P. Heider, N. Navab Assessment of Automatic Classification of Artery Plaque Composition in IVUS Images Using Histology Correlation 22nd International Congress and Exhibition June 25 - 28, 2008, Barcelona, Spain (bib)
	A. Roodaki, Z.Najafi, A.Soltanzadi, A. Taki, S.K. Setarehdan, N. Navab Detection of Outer Layer of the Vessel Wall and Characterization of Calcified Plaques in IVUS Images 13th Int'l CSI Computer Conference, CSICC'08, Kish Island, Iran, March 2008. (bib)
	A.Soltanzadi, Z.Najafi, A. Roodaki, A. Taki, S.K. Setarehdan, R. Zoroofi, N. Navab Full automatic border extraction of coronary arteries in IVUS images using deformable models 14th Conference on Medical Engineering, Tehran, Iran, Dec.2007 (bib)
	Z.Najafi, A. Taki, S.K. Setarehdan, R. Zoroofi, A. Konig, N. Navab A new method for automatic border detection in IVUS images and 3D visualization of segmented frames The 4th Visual Information Engineering 2007 Conference: VIE 2007, London, July 2007. (bib)
	A. Taki, Z.Najafi, S.K. Setarehdan, N. Navab, R. Zoroofi A new automatic border detection method for lumen and mediaadventitia boundaries in IVUS images June.2007, Proceedings of 21st International Congress of Computer Assisted Radiology and Surgery (CARS 2007), Berlin, Germany. (bib)
	A. Taki, M.D. Abolhassani Modeling of 2D Array transducer for beam optimization in 3D ultrasound imaging The Third IASTED International Conference on Biomedical Engineering: IASTED(Biomed 2005), Innsbruck, Austria, Feb.2005. (bib)
	A. Taki, M.D. Abolhassani Ultrasound Two Dimensional Array Transducer Modeling in 3D Imaging Iranian Journal of Medical Physics, Vol.1, No.2, Summer2003 (bib)

Invited Talks

- Invited Speaker at CVII-Stent Workshop in the 18th International Conference on Medical Image Computing and Computer Assisted Intervention Medical Imagining (MICCAI 2015), From Brain Monitoring to Patient Protection, Munich, Germany, October 2015.

- Keynote Speaker at the International Conference on Computer, Electronics, and Biomedical Engineering (ICCEBE2015), Advance Brain Monitoring, Dubai, October 2015.

- Keynote Speaker at The International Conference on Electrical and Bio-medical Engineering, Clean Energy and Green Computing (EBECEGC2015), The Analysis of Cardiovascular Images through Medical Engineering Approaches, Dubai, January 2015

- The Second Middle East Conference on Biomedical Engineering (MECBME), Qatar: Brain Monitoring Workshop, February 2014

- 3rd GCC Conference on Biomedical Engineering, Arab Health Congress 2014, Dubai: Brain Monitoring, January 2014

- Workshop on Advanced Imaging and Visualization, Austria : Brain Monitoring, May 2013

- American University of Sharjah, Department of Electrical Engineering, UAE: IVUS Imaging and Plaque Characterization, February 2012

- Sabanci University, Department of Engineering and Natural Sciences, Istanbul, Turkey, Automated Detection and Characterization of Atherosclerotic Plaque Composition in IVUS, October 2008

Teaching Courses

- Scientific Advisor and Study Coordinator for Preparing Curriculum for Master of Biomedical Medical Computing and Imaging at TUM Asia

- Lecturer of Special Topics on Biomedical Engineering, Biomedical Engineering Group, IAU University, Dubai Branch, Fall Semester 2014-2015

- Lecturer of * Introduction to Biomedical Engineering & Healthcare Centers*, Biomedical Engineering Group, IAU University, Dubai Branch, Winter Semester 2015-2016

- Lecturer of English in Biomedical Engineering, Biomedical Engineering Group, IAU University, Dubai Branch, Fall Semester 2015-2016

- Lecturer of Medical Device & Patient Safety, Biomedical Engineering Group, IAU University, Dubai Branch, Fall Semester 2016-2017

Student Projects

- 3D reconstruction of consecutive IVUS frames (PhD Student)

-  Developing Fuzzy Risk Assessment of Vulnerable Plaques Using Virtual Histology Image (PhD Student)

- Fully Automated Border Detection of IVUS Images (Master Student)

-  Automatic Shadow Enhancement in Intravascular Ultrasound (IVUS) Images (Master Student-Finished)

- A New Method for Automatic Border Detection of IVUS Images (Master Student-Finished)

- Modified wavelet transform features for Characterizing different plaque types in IVUS images (Master Student-Finished);

-  Simulation of Operating Rooms based on Medical Devices used in Surgical Procedures (Bachelor Student)

- Cardiac Application based on Medical Devices used in Cardiac Procedures (Bachelor Student)

Education

2006-2010	Ph.D. (Dr.rer.nat) at the CAMPAR team Technical University of Munich , with Prof. Dr. Nassir NAVAB.
2000-2003	Master of Science Degree in Biomedical Engineering (Bio-Electric) Faculty of Biomedical Engineering of Tehran University of Medical Sciences , Iran.
1996-2000	Bachelor of Science Degree in Biomedical Engineering from the Faculty of Biomedical Engineering of Amirkbir University (Tehran Polytechnic), Iran.