[Intl_DxMedPhys] Favorite introduction to CT recon?

Fri Mar 13 13:55:37 EDT 2026

Trying again with the attachment as a drive link (first email bounced)
https://urldefense.com/v3/__https://drive.google.com/file/d/1CQu0-_onglCBVdL0kxCG0FRp-f_wNEK7/view?usp=sharing__;!!KGKeukY!3SjQe99Pi8I71cIkXTcLjUTCgw6RMbDymq_VTyucBNoZO_gOUNh8OWr7rpG16rO0MGakSFvSxZnutfvFBWAIInM9DwEgevR2huYBhe4DsfQSi0Y8tA$ 

Kak and Slaney have the seminal textbook (in my opinion on this) and have math allowing a student to code their own CT projections (including how to parameterize elliptical objects), do the filtration, and do the back projection. https://urldefense.com/v3/__https://www.slaney.org/pct/pct-toc.html__;!!KGKeukY!3SjQe99Pi8I71cIkXTcLjUTCgw6RMbDymq_VTyucBNoZO_gOUNh8OWr7rpG16rO0MGakSFvSxZnutfvFBWAIInM9DwEgevR2huYBhe4DsfSCb9J6TQ$  the book is free online. Any CT scientist worth their salt should go through that trial of coding up their own code from start to finish. You can get fancy and even add energy dependence to the spectra and objects using the spektr toolkit and then discuss beam hardening and so forth as well. https://urldefense.com/v3/__https://pmc.ncbi.nlm.nih.gov/articles/PMC4958109/__;!!KGKeukY!3SjQe99Pi8I71cIkXTcLjUTCgw6RMbDymq_VTyucBNoZO_gOUNh8OWr7rpG16rO0MGakSFvSxZnutfvFBWAIInM9DwEgevR2huYBhe4DsfQbyhz5Ng$   I think this is essential to do from scratch to ever really understand how a ct scanner works. A code like this can be used to understand so many things. My professor made us do this when we took CT at UW, so we are all salty here from UW if you took advanced CT as a course ;)

The best I have seen in lecture format is from a colleague of mine here at UW, he teaches our CT recon class, "Zhang, Ran" <RZhang3 at uwhealth.org> you could ask him for slides or more advice?

I attached my resident teaching deck on this part of CT, nothing too in depth but if useful for you, great.

-stick

Timothy P. Szczykutowicz, Ph.D., DABR
Professor
Departments of Radiology, Medical Physics and BME
University of Wisconsin Madison
Cell# 1-716-560-7751<tel:(716)%20560-7751>
Office# 1-608-263-5729
he/him/his

________________________________
From: Szczykutowicz, Timothy P <TSzczykutowicz at uwhealth.org>
Sent: Friday, March 13, 2026 12:48 PM
To: DxMedPhys List <intl_dxmedphys_wd_osu_list at lists.osu.edu>
Subject: Re: [Intl_DxMedPhys] Favorite introduction to CT recon?

Kak and Slaney have the seminal textbook (in my opinion on this) and have math allowing a student to code their own CT projections (including how to parameterize elliptical objects), do the filtration, and do the back projection. https://urldefense.com/v3/__https://www.slaney.org/pct/pct-toc.html__;!!KGKeukY!3SjQe99Pi8I71cIkXTcLjUTCgw6RMbDymq_VTyucBNoZO_gOUNh8OWr7rpG16rO0MGakSFvSxZnutfvFBWAIInM9DwEgevR2huYBhe4DsfSCb9J6TQ$  the book is free online. Any CT scientist worth their salt should go through that trial of coding up their own code from start to finish. You can get fancy and even add energy dependence to the spectra and objects using the spektr toolkit and then discuss beam hardening and so forth as well. https://urldefense.com/v3/__https://pmc.ncbi.nlm.nih.gov/articles/PMC4958109/__;!!KGKeukY!3SjQe99Pi8I71cIkXTcLjUTCgw6RMbDymq_VTyucBNoZO_gOUNh8OWr7rpG16rO0MGakSFvSxZnutfvFBWAIInM9DwEgevR2huYBhe4DsfQbyhz5Ng$   I think this is essential to do from scratch to ever really understand how a ct scanner works. A code like this can be used to understand so many things. My professor made us do this when we took CT at UW, so we are all salty here from UW if you took advanced CT as a course ;)

The best I have seen in lecture format is from a colleague of mine here at UW, he teaches our CT recon class, "Zhang, Ran" <RZhang3 at uwhealth.org> you could ask him for slides or more advice?

I attached my resident teaching deck on this part of CT, nothing too in depth but if useful for you, great.

-stick

Timothy P. Szczykutowicz, Ph.D., DABR
Professor
Departments of Radiology, Medical Physics and BME
University of Wisconsin Madison
Cell# 1-716-560-7751<tel:(716)%20560-7751>
Office# 1-608-263-5729
he/him/his

________________________________
From: Intl_dxmedphys_wd_osu_list <intl_dxmedphys_wd_osu_list-bounces+tszczykutowicz=uwhealth.org at lists.osu.edu> on behalf of Bill Erwin via Intl_dxmedphys_wd_osu_list <intl_dxmedphys_wd_osu_list at lists.osu.edu>
Sent: Friday, March 13, 2026 12:13 PM
To: Harry Ingleby <hingleby at cancercare.mb.ca>
Cc: intl_dxmedphys_wd_osu_list at lists.osu.edu <intl_dxmedphys_wd_osu_list at lists.osu.edu>
Subject: Re: [Intl_DxMedPhys] Favorite introduction to CT recon?

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Harry, What source materials have you been using? (Just curious. ) Bill On Thu, Mar 12, 2026 at 2: 37 PM Harry Ingleby via Intl_dxmedphys_wd_osu_list <intl_dxmedphys_wd_osu_list@ lists. osu. edu> wrote: Hi all, I’m teaching the Physics of X-ray
Harry,

What source materials have you been using?

(Just curious.)
Bill

On Thu, Mar 12, 2026 at 2:37 PM Harry Ingleby via Intl_dxmedphys_wd_osu_list <intl_dxmedphys_wd_osu_list at lists.osu.edu<mailto:intl_dxmedphys_wd_osu_list at lists.osu.edu>> wrote:
Hi all, I’m teaching the Physics of X-ray Imaging to med phys graduate students, it’s my 5th go-round for this course and I’m still not completely happy with the source materials I use for introducing the basics of CT - line integrals, projections,
Hi all,

I’m teaching the Physics of X-ray Imaging to med phys graduate students, it’s my 5th go-round for this course and I’m still not completely happy with the source materials I use for introducing the basics of CT - line integrals, projections, sinograms, Fourier slice theorem, etc. Anyone have any books or papers they particularly like, with clear explanations and a good balance between showing the math and explaining the physical principles?

Thanks,
Harry

--

Harry Ingleby, PhD, MCCPM

Imaging Physicist

CancerCare Manitoba

hingleby at cancercare.mb.ca<mailto:hingleby at cancercare.mb.ca>

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