Mr. Cheng Shi Profile

Cheng Shi

at Tsinghua Univ

SPIE Involvement:

Author

Publications (1)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 24 February 2010 Paper

Optimization of detector thickness for single slice helical CT with ROC study

Cheng Shi, Yuxiang Xing

Proceedings Volume 7627, 76271D (2010) https://doi.org/10.1117/12.844611

KEYWORDS: Sensors, Signal to noise ratio, Computed tomography, X-ray computed tomography, Numerical simulations, 3D image processing, 3D displays, X-rays, Diagnostics, Performance modeling

Read Abstract +

Helical CT scan has been acknowledged to be a very useful scanning mode. Normally, the speed of bed movement per rotation (pitch) for a helical CT is fixed to meet the requirement of CT scanning speed. To reduce system cost, single slice helical CT (SSHCT) is often chosen in many applications. It is interesting and useful in real life to answer the question that how to design the detector to obtain optimal performance of a SSHCT in a detection task. In this work, we applied ROC study for the optimization of detector thickness along the direction of rotation axis for our SSHCT. Numerical simulations followed by human observer studies are done in this investigation. Compound Gaussian noises are modeled in our numerical simulations for objects both with and without lesions. An analytical FBP reconstruction method with rebinning is used for noisy data reconstruction. It can be seen in the reconstructions that thin detectors lead to artifacts, and that thick detectors lead to lesion blurring and lower contrast. All these impact on lesion detection in the practical imaging applications. According to our ROC tests done on images from five choices of detector thickness, optimal performance is obtained when choosing detector thickness being around 1~1.25 times of the helical pitch. Moreover, we find that, under different noise level, the optimal point is about the same. Some other figures of merit including SNR and HTC are also calculated and examined in this work. The results relates well with the results of AUCs. It shows that, they could serve very well as the indicators for system optimization when few non-linear physical effect and reconstruction processing are involved.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years