Mr. William P. Donahue Profile

William P. Donahue

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 | 1 March 2019 Paper

Investigation of scintillation light spread in a hemi-ellipsoid monolithic crystal for Cardiac SPECT using Geant4

Hanif Soysal, Joyoni Dey, William Donahue

Proceedings Volume 10948, 109485V (2019) https://doi.org/10.1117/12.2512858

KEYWORDS: Crystals, Sensors, Scintillation, Single photon emission computed tomography, Monte Carlo methods, Photons, Scintillators, Detection and tracking algorithms, Geometrical optics

Read Abstract +

Purpose: Dey group proposed a high sensitivity Cardiac SPECT system using hemi-ellipsoid detectors with pinhole collimation. To investigate detector resolution in more detail, we simulate the scintillator light spread on a monolithic hemi-ellipsoidal CsI crystal. We assume small optical light detectors will be placed on the outer surface of the crystal. Methods: We used Geant4 Monte Carlo simulation to produce the expected distribution of scintillation light on the outer surface of the crystal. This Lookup Table (LUT) is generated for 12 points, 4 at each of the apex, central region, and base of one slice of the crystal. Each set of points was situated at the corners of a “square” of side length 2mm. The light distributions were visualized using a flattened, cut hemi-ellipsoid. To test the performance of the LUT, 5 points inside each of the these “squares” were chosen as test points, and a light distribution was obtained for each. A light distribution match algorithm was developed to localize the test points. Results: Our results showed that, visually, we were able to distinguish the light distributions of points in the central region and base. Furthermore, our algorithm was able to localize the test points to within 1mm in these regions. The localization was slightly worse in the apex with a maximum error of about 1.5mm. However, the high magnification in the apex region will minimize the error in the system resolution for this region. In the future, we will simulate the full LUT and improve the search algorithm.

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