A microwave system for blood perfusion measurements of tissue; a preliminary study

2013 ◽  
Author(s):  
Mohammad-Reza Tofighi ◽  
Charlie Tran Huynh
Keyword(s):  
Blood Perfusion ◽  
Microwave System ◽  
Preliminary Study ◽  
Perfusion Measurements

Evaluation of doppler ultrasound for blood perfusion measurements

1991 ◽  
Vol 17 (5) ◽  
pp. 445-452 ◽  
Author(s):  
Roger Eriksson ◽  
Hans W. Persson ◽  
Stephan O. Dymling ◽  
Kjell Lindström
Keyword(s):  
Doppler Ultrasound ◽  
Blood Perfusion ◽  
Perfusion Measurements

scholarly journals A Phantom Tissue System for the Calibration of Perfusion Measurements

2008 ◽  
Vol 130 (5) ◽  
Author(s):  
Ashvinikumar V. Mudaliar ◽  
Brent E. Ellis ◽  
Patricia L. Ricketts ◽  
Otto I. Lanz ◽  
Elaine P. Scott ◽  
...  
Keyword(s):  
Heat Flux ◽  
Blood Perfusion ◽  
Tissue Perfusion ◽  
Cfd Models ◽  
Tissue System ◽  
Good Measurement ◽  
Computational Fluid Dynamics Cfd ◽  
Phantom Tissue ◽  
Flux Response ◽  
Perfusion Measurements

A convenient method for testing and calibrating surface perfusion sensors has been developed. A phantom tissue model is used to simulate the nondirectional blood flow of tissue perfusion. A computational fluid dynamics (CFD) model was constructed in Fluent® to design the phantom tissue and validate the experimental results. The phantom perfusion system was used with a perfusion sensor based on clearance of thermal energy. A heat flux gage measures the heat flux response of tissue when a thermal event (convective cooling) is applied. The blood perfusion and contact resistance are estimated by a parameter estimation code. From the experimental and analytical results, it was concluded that the probe displayed good measurement repeatability and sensitivity. The experimental perfusion measurements in the tissue were in good agreement with those of the CFD models and demonstrated the value of the phantom tissue system.

Blood Perfusion Measurements by the Analysis of the Heated Thermocouple Probe’s Temperature Transients

1979 ◽  
Vol 101 (1) ◽  
pp. 58-65 ◽  
Author(s):  
W. R. Johnson ◽  
A. H. Abdelmessih ◽  
J. Grayson
Keyword(s):  
Thermal Conductivity ◽  
Blood Perfusion ◽  
Transient Temperature ◽  
Perfusion Rate ◽  
Probe Size ◽  
Step Heating ◽  
Dog Kidney ◽  
Surrogate Tissue ◽  
Probe Calibration ◽  
Perfusion Measurements

The Gibbs’ heated thermocouple technique for measuring a tissue’s thermal conductivity to infer the blood perfusion rate has been synthesized with a model of transient heal transport in perfused tissue. This procedure eliminates the necessity of probe calibration in surrogate tissue. The analytical predictions of the transient temperature behavior of a newly designed spherical probe were compared with experimental temperature transients to deduce thermal conductivities of and perfusion rates in gelatin and dog kidney. The principle heating modality was step heating. Consistent conductivity values for both the gelatin and the kidney were found. The calculated perfusion rates in the kidney were consistent but were higly dependent upon probe size and geometry, and the independently measured tissue’s thermal conductivity.

scholarly journals Non-invasive blood perfusion measurements using a combined temperature and heat flux surface probe

2008 ◽  
Vol 51 (23-24) ◽  
pp. 5740-5748 ◽  
Author(s):  
Patricia L. Ricketts ◽  
Ashvinikumar V. Mudaliar ◽  
Brent E. Ellis ◽  
Clay A. Pullins ◽  
Leah A. Meyers ◽  
...  
Keyword(s):  
Heat Flux ◽  
Blood Perfusion ◽  
Flux Surface ◽  
Non Invasive ◽  
Surface Probe ◽  
Perfusion Measurements

Blood Perfusion Measurements in the Canine Prostate During Transurethral Hyperthermia

1998 ◽  
Vol 858 (1 BIOTRANSPORT) ◽  
pp. 21-29 ◽  
Author(s):  
LISA X. XU ◽  
LIANG ZHU ◽  
KENNETH R. HOLMES
Keyword(s):  
Blood Perfusion ◽  
Perfusion Measurements
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