Optimization of shutter scan parameters in digital tomosynthesis system

Dohyeon Kim; Donghoon Lee; Haenghwa Lee; Sunghoon Choi; Seungyeon Choi; Zhen Chao; Hee-joung Kim

doi:10.1117/12.2292273

9 March 2018 Optimization of shutter scan parameters in digital tomosynthesis system

Dohyeon Kim, Donghoon Lee, Haenghwa Lee, Sunghoon Choi, Seungyeon Choi, Zhen Chao, Hee-joung Kim

Proceedings Volume 10573, Medical Imaging 2018: Physics of Medical Imaging; 105735R (2018) https://doi.org/10.1117/12.2292273
Event: SPIE Medical Imaging, 2018, Houston, Texas, United States

Abstract

In medical imaging field, various dose reduction techniques have been studied. We proposed shutter scan acquisition for region of interest (ROI) imaging to reduce the patient exposure dose in digital tomosynthesis system. Projections obtained by shutter scan acquisition is a combination of truncated projections and non-truncated projections. In this study, we call the number of truncated projections divided by the number of non-truncated projections as shutter weighting factor. The shutter scan acquisition parameters were optimized using 5 different acquisition sets with the shutter weighting factor (0.16, 0.35, 1.03, 3.05 and 7.1). A prototype CDT system (LISTEM, Korea) and the LUNGMAN phantom (Kyoto Kagaku, Japan) with an 8 mm lung nodule were used. A total of 81 projections with shutter scan acquisition were obtained in 5 sets according to shutter weighting factor. The image quality was investigated using the contrast noise ratio (CNR). We also calculated figure of merit (FOM) to determine optimal acquisition parameters for the shutter scan acquisition. The ROI of the reconstructed image with shutter scan acquisition showed enhanced contrast. The highest CNR and FOM value, shutter weighting factor 7.1, is the acquisition set consisting of 71 truncated projections and 10 non-truncated projections. In this study, we investigated the effects of composition ratio of the truncated and non-truncated projections on reconstructed images through the shutter scan acquisition. In addition, the optimal acquisition conditions for the shutter scan acquisition were determined by deriving the FOM values. In conclusion, we can suggest optimal shutter scan acquisition parameters on the lesion within the ROI to be diagnosed.

Citation Download Citation

Dohyeon Kim, Donghoon Lee, Haenghwa Lee, Sunghoon Choi, Seungyeon Choi, Zhen Chao, and Hee-joung Kim "Optimization of shutter scan parameters in digital tomosynthesis system", Proc. SPIE 10573, Medical Imaging 2018: Physics of Medical Imaging, 105735R (9 March 2018); https://doi.org/10.1117/12.2292273

ACCESS THE FULL ARTICLE

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: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
6 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Camera shutters

Lung

Image quality

Image processing

Imaging systems

Chest

Prototyping

Show All Keywords

Keywords/Phrases

Search In:

Publication Years