PMID- 32746355
OWN - NLM
STAT- MEDLINE
DCOM- 20210514
LR  - 20210514
IS  - 1940-9990 (Electronic)
IS  - 1932-4545 (Linking)
VI  - 14
IP  - 4
DP  - 2020 Aug
TI  - Bladder Volume Monitoring Using Electrical Impedance Tomography With Simultaneous 
      Multi-Tone Tissue Stimulation and DFT-Based Impedance Calculation Inside an FPGA.
PG  - 775-786
LID - 10.1109/TBCAS.2020.3008831 [doi]
AB  - In this article, a novel method for measuring the volume of the urinary bladder 
      non-invasively is presented that relies on the principles dictated by Electrical 
      Impedance Tomography (EIT). The electronic prototype responsible for injecting 
      innocuous electrical currents to the lower abdominal region and measuring the 
      developed voltage levels is fully described, as well as the computational models 
      for resolution of the so-called Forward and Inverse Problems in Imaging. The 
      simultaneous multi-tone injection of current provided by a high performance Field 
      Programmable Gate Array (FPGA), combined with impedance estimation by the 
      Discrete Fourier Transform (DFT) constitutes a novelty in Urodynamics with 
      potential to monitor continuously the intravesical volume of patients in a much 
      faster and comfortable way than traditional transurethral catheterization 
      methods. The resolution of the Inverse Problem is performed by the Gauss-Newton 
      method with Laplacian regularization, allowing to obtain a sectional 
      representation of the volume of urine encompassed by the bladder and surrounding 
      body tissues. Experimentation has been carried out with synthetic phantoms and 
      human subjects with results showing a good correlation between the levels of 
      abdominal admittivity acquired by the EIT system and the volume of ingested 
      water.
FAU - Rosa, Bruno M G
AU  - Rosa BMG
FAU - Yang, Guang Z
AU  - Yang GZ
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20200713
PL  - United States
TA  - IEEE Trans Biomed Circuits Syst
JT  - IEEE transactions on biomedical circuits and systems
JID - 101312520
SB  - IM
MH  - Adult
MH  - *Electric Impedance
MH  - Electrodes
MH  - Equipment Design
MH  - *Fourier Analysis
MH  - Humans
MH  - Male
MH  - Phantoms, Imaging
MH  - Signal Processing, Computer-Assisted/instrumentation
MH  - Tomography/*instrumentation
MH  - *Urinary Bladder/anatomy & histology/diagnostic imaging/physiology
EDAT- 2020/08/04 06:00
MHDA- 2021/05/15 06:00
CRDT- 2020/08/04 06:00
PHST- 2020/08/04 06:00 [pubmed]
PHST- 2021/05/15 06:00 [medline]
PHST- 2020/08/04 06:00 [entrez]
AID - 10.1109/TBCAS.2020.3008831 [doi]
PST - ppublish
SO  - IEEE Trans Biomed Circuits Syst. 2020 Aug;14(4):775-786. doi: 
      10.1109/TBCAS.2020.3008831. Epub 2020 Jul 13.