Ping-Hong Lai1,2, Hing-Chiu Chang3,4,
Hsiao-Wen Chung4
1Department of Radiology, Kaohsiung
Veterans General Hospital, Kaohsiung, Taiwan; 2School of Medicine,
National Yang-Ming University, Taipei, Taiwan; 3Applied Science
Laboratory, GE Healthcare Taiwan, Taipei, Taiwan; 4Institute of
Biomedical Electronics and Bioinformatics, National Taiwan University,
Taipei, Taiwan
SWI
is a novel MR technique that exploits the magnetic susceptibility differences
of various tissues, such as venous structure and iron deposition. When SWI
was applied to patients with abscess, we found that, compared with
homogeneous rim-enhancement on post-contrast magnitude images, the capsular
portion of pyogenic brain abscess on post-contrast SWI images showed a
multi-layer appearance. In this work, in order to clarify whether this
multi-layer characteristic is physiological or technical in it origin, we
investigate the causes of this multi-layer appearance, and use a theoretical
model to simulate the multi-layer appearance upon the use of different SWI
processing parameters.