title: Detection of cerebral hemorrhage in rabbits by time-difference magnetic inductive phase shift spectroscopy.
abstract: Cerebral hemorrhage, a difficult issue in clinical practice, is often detected and studied with computed tomography (CT), magnetic resonance imaging (MRI), and positron emission tomography (PET). However, these expensive devices are not readily available in economically underdeveloped regions, and hence are unable to provide bedside and emergency on-site monitoring. The magnetic inductive phase shift (MIPS) is an emerging technology that may become a new tool to detect cerebral hemorrhage and to serve as an inexpensive partial substitute to medical imaging. In order to study a wider band of cerebral hemorrhage MIPS and to provide more useful information for measuring cerebral hemorrhage, we established a cerebral hemorrhage magnetic induction phase shift spectroscopy (MIPSS) detection system. Thirteen rabbits with five cerebral hemorrhage states were studied using a single coil-coil within a 1 MHz-200 MHz frequency range in linear sweep. A feature band (FB) with the highest detection sensitivity and the greatest stability was selected for further analysis and processing. In addition, a maximum conductivity cerebrospinal fluid (CSF) MRI was performed to verify and interpret the MIPSS result. The average phase shift change induced by a 3 ml injection of autologous blood under FB was -7.7503° ± 1.4204°, which was considerably larger than our previous work. Data analysis with a non-parametric statistical Friedman M test showed that in the FB, MIPSS could distinguish the five states of cerebral hemorrhage in rabbits, with a statistical significance of p<0.05. A B-F distribution profile was designed according to the MIPSS under FB that can provide instantaneous diagnostic information about the cerebral hemorrhage severity from a single set of measurements. The results illustrate that the MIPSS detection method is able to provide a new possibility for real-time monitoring and diagnosis of the severity of cerebral hemorrhage.
authors.affiliation: College of Biomedical Engineering, Third Military Medical University, Chongqing, China.
authors.forename: Wencai
authors.initials: W
authors.lastname: Pan
authors.affiliation: College of Biomedical Engineering, Third Military Medical University, Chongqing, China; State Key Laboratory of Trauma, Burns and Combined Injury, Daping Hospital, Surgery Institute of the Third Military Medical University, Chongqing, China.
authors.forename: Qingguang
authors.initials: Q
authors.lastname: Yan
authors.affiliation: College of Biomedical Engineering, Third Military Medical University, Chongqing, China.
authors.forename: Mingxin
authors.initials: M
authors.lastname: Qin
authors.affiliation: College of Biomedical Engineering, Third Military Medical University, Chongqing, China.
authors.forename: Gui
authors.initials: G
authors.lastname: Jin
authors.affiliation: College of Biomedical Engineering, Third Military Medical University, Chongqing, China.
authors.forename: Jian
authors.initials: J
authors.lastname: Sun
authors.affiliation: College of Biomedical Engineering, Third Military Medical University, Chongqing, China.
authors.forename: Xu
authors.initials: X
authors.lastname: Ning
authors.affiliation: College of Biomedical Engineering, Third Military Medical University, Chongqing, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Zhuang
authors.affiliation: Department of Biomedical Engineering, Chongqing University, Chongqing, China.
authors.forename: Bin
authors.initials: B
authors.lastname: Peng
authors.affiliation: Department of Biomedical Engineering, Chongqing University, Chongqing, China.
authors.forename: Gen
authors.initials: G
authors.lastname: Li
mesh_terms: D000818:Animals; D002543:Cerebral Hemorrhage / Q000175:diagnosis*; D008280:Magnetics / Q000379:methods; D011817:Rabbits; D013057:Spectrum Analysis / Q000379:methods*