Computed Tomography or CAT Scans/Expert Profile

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Dr. Shahzad Ahmad Qureshi


I can answer questions about transmission computed tomography, simulated annealing-based tomography and binary & continuous genetic algorithms-based tomography. I shall not be able to answer as an expert about MRI, fMRI...

Experience in the area

I have an eight year experience as a researcher.


National Institute of Lasers and Optronics, Islamabad, Pakistan.


1. S. A. Qureshi, S. M. Mirza, Nasir M. Rajpoot, Member IEEE, and M. Arif A Novel GA Approach to Tomographic Image Reconstruction, IEEE Trans. Image Processing, Vol. 20, Issue 7, pp. 1977-1990, 2011 (Online ISSN: 1057-7149, DOI: 10.1109/TIP.2011.2107328) ISI index: 4.205, 2011

2. S. A. Qureshi, S. M. Mirza, and M. Arif Hybrid Simulated Annealing Image Reconstruction for Parallel-Ray Transmission Tomography, Inverse Problems in Science and Engineering, Taylor & Francis, Vol. 17, Issue 5, pp. 647-664, 2009 (Online ISSN: 1741–5985, Print ISSN: 1741–5977, DOI: 10.1080/17415970802390085) ISI index: 0.416, 2008

3. S. A. Qureshi, S. M. Mirza, and M. Arif Determination of Optimal Number of Projections and Parametric Sensitivity Analysis of Operators for Parallel-Ray Transmission Tomography using Hybrid Continuous Genetic Algorithm, International Journal of Imaging Systems and Technology, Vol. 17, Issue 1, pp. 10-21, 2007 (Online ISSN: 1098-1098, Print ISSN: 0899-9457, DOI: 10.1002/ima.20093), ISI index: 0.983, 2006

4. S. A. Qureshi, S. M. Mirza, and M. Arif Optimization of Projections for Parallel-Ray Transmission Tomography using Genetic Algorithm, in Wireless Networks, Information Processing and Systems, Vol. 20, Issue 3, pp. 20-39, 2006, Springer Berlin Heidelberg, 2008 (Online ISSN: 1865-0929, Print ISSN: 1865-0937, Online ISBN: 978-3-540-89852-8, Print ISBN: 978-3-540-89853-5, DOI: 10.1007/978-3-540-89853-5_6)


PhD (Computer Science), MS (Nuclear Engg.), MSc (Computer Science), BE (Metallurgical Engg. and Materials Science)

Awards and Honors

• Fellowship for Ph.D. in Computer Science by Higher Education Commission, Islamabad (2004).

• Fellowship for Research Work at the University of Warwick, the United Kingdom during PhD in the Image Processing Group at the Department of Computer Science (2008)

• Fellowship for M.Sc. Nuclear Engineering from Quaid-i-Azam University, Islamabad for the session 1994-96

• University Merit Scholarship by UET, Lahore awarded every year for being declared as the Top Student during BE

• Gold Medalist of BE with HONOURS by UET, Lahore for the session 1988-92

• Secured Bull’s Eye (100% score) in TCP/IP 4.0 and 90% in Networking Essentials and Microsoft Windows NT 4.0 Workstation (MCSE)

What do you like about this subject?

It reveals the internal sections of the object by approximation using measured projections data.

What do you still hope to achieve/learn in this field?

Ridgelet transforms usage for approximation of inverse Radon transform.

Something interesting about this subject that others may not know:

CT scanning is an inverse problem that is ill-posed. Mathematically, infinite number of projections are required to find the exact Radon transform.

Something controversial or provocative about this subject

Heavy computational load that is unavoidable.

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    K = Knowledgeability    C = Clarity of Response    P = Politeness
Mazhar Ali 03/10/14101010Thanks allot sir the answer you given .....
Syed Ahsin Ali Shah02/25/13101010thanks

Recent Answers from Dr. Shahzad Ahmad Qureshi

2014-05-09 Hi:

Hello Ranga,    Assalam o Alaykum    Its been long since we were together. I do remember you as my best friend.    My contact number is:    92-311-1716170    Do you have skype facility with you. My skype

2014-05-03 Hi:

Hi Aurangzeb,    Please introduce yourself and your speciality.    Regards,    Dr. Shahzad.

2014-04-16 Data Acqusition:

The voltage level or the current measured would let us know the intensity of light transmitted. The IR through phantom would certainly be absorbed or consumed to some extent. In comparison to this the

2014-04-14 FBP:

In filtered back projection method the projections are first convoluted to a suitable high pass filter and then the back projection is carried out to get the reconstructed image. In back projection the

2012-10-04 ct scan:

Hi     If the problem is still persisting then I suggest that you should go     through an MRI scan. Most of the brain material some or the other way     carries protons revealing its internal structure


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