Prone breast tumor imaging using vertical axis-of-rotation (VAOR) SPECT systems: An initial study


Journal Article

We propose the use of a single photon emission computed tomography (SPECT) system equipped with multiple cameras which revolve around a vertical axis-of-rotation (VAOR) for prone-dependent (i.e., patient in prone position) breast tumor imaging. This geometry for nuclear medicine breast imaging reduces the amount of attenuating material between the breast tissue and the gamma camera and, in addition, it offers a minimal radius-of-rotation compared to breast imaging using conventional (i.e., 360°, horizontal axis-of-rotation) SPECT. The decrease in attenuation and radius-of-rotation results in an increase in detected counts and increased collimator resolution. Because VAOR SPECT systems are currently not commercially available, we conducted our experiments on a conventional SPECT system using an isolated breast phantom to investigate the proposed VAOR method. Our experimental setup simulated a VAOR SPECT study with a pronedependent breast in the camera's field-of-view. The results of our experiment indicate that VAOR breast SPECT with Trionix low-energy super-high resolution (LESR) parallel-hole collimation is capable of detecting a breast lesion with an outer diameter of 10 mm and a lesion-to-background concentration ratio of 6-to-l. The results also demonstrate that VAOR breast SPECT provides improved lesion visualization over parallel-hole planar imaging (i.e., scintimammography) and breast imaging using horizontal axis-of-rotation SPECT. © 1997 IEEE.

Full Text

Duke Authors

Cited Authors

  • Wang, H; Scarfone, C; Greer, KL; Edward Coleman, R; Jaszczak, RJ

Published Date

  • December 1, 1997

Published In

Volume / Issue

  • 44 / 3 PART 2

Start / End Page

  • 1271 - 1276

International Standard Serial Number (ISSN)

  • 0018-9499

Digital Object Identifier (DOI)

  • 10.1109/23.597000

Citation Source

  • Scopus