Scheduled System Maintenance:
On May 6th, single article purchases and IEEE account management will be unavailable from 8:00 AM - 12:00 PM ET (12:00 - 16:00 UTC). We apologize for the inconvenience.
By Topic

Fourier coded-aperture imaging in nuclear medicine

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $31
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

1 Author(s)
Chou, C. ; Nat. Yang Ming Med. Coll., Taipei, Taiwan

A Fourier aperture (FA) is composed of two sinusoidal gratings in contact. When the two gratings rotate on the same axis in equal angles but opposite directions, a clear pattern of difference moire fringes is formed, the moire frequency depending on the angle between the two gratings. This aperture of moire fringes is used as a variable-frequency grating which is able to scan the object spectrum in the frequency domain. The summation-filtered back projection algorithm with three different apodising functions was introduced in the reconstruction. A 99mTc gamma ray source and a 1 inch-diameter NaI scintillation detector were used in the experiment. The thyroid phantom images showed that spatial resolution of FA agrees with the theoretical prediction. Three dimensional image capability is also discussed. The matrix inversion algorithm was used in the computer simulation of 3-D images. Although the depth resolution of a FA is limited by the restricted view angle of the detector, two plane objects free from noise at different depths were reconstructed

Published in:

Science, Measurement and Technology, IEE Proceedings -  (Volume:141 ,  Issue: 3 )