The Review Effect: Papers & Models!!

09:50 am

Yes, back after a big gap! Not healthy. Was busy with reviews, which I consider are a waste of time. Lost out on 4 days worth of project work or Image processing studies. Upset, but can't help, gotta move on.

Alright, so the last time, my external guide, and me, had a discussion, we decided on having a computer simulated model for utero-placental, or umbilical artery, or middle cerebral artery. He suggested something new, quite exciting. Instead of modeling the blood flow physically, we could model it electrically. He even sent me a model that he found on www.biomedical-engineering-online.com. Nice website,.. so much of information available. Wish I had more time to go through this.

A thing that excited me the most of the use of an electrical model. This excited me not at the time that he explained the model to me, but after the reviews took place. Because in the reviews I realised what the ethical committee considers important and authentic for the publication of a paper. Advantage of using an electrical model is that on one hand we could implement its hardware and obtain the output, on the other hand we could simulate the model on simulink and obtain the output. Match both the outputs and check if they are anywhere close to the actual physiological output. If all these match we will end up with a good authentic model.

Now, we have realized that we need to create a utero-placental circulation model whose output needs to be a velocity profile of blood flow vr, as given out by the doppler signal of the ultrasound machine's doppler mode, so that I can then use it according to the following relation,

fD = (2 f vr cosq )/c

to generate fD which can be used in matlab to generate an audio output. This will then, be varied under various circumstances, to obtain a database to train my Artificial Intelligence module.

Need to search for papers that describe various utero-placental models predicting the doppler waveforms.

A paper " Effect of non-linearity in predicting doppler waveforms through a novel model " is the best that I've found till now. 

Other than that, a paper referred as, A transmission line modelling approach to the interpretation of uterine Doppler waveforms. also seems nice, which is the base paper for the previous one. So, basically the same concept. 

Then there's this paper Gestational age dependency of umbilical flow waveforms: an investigation using a lumped parameter model whose content again, I cant see. 

Then there's Markov Based Mathematical Model of Blood FlowPattern in Fetal Circulatory System. I'll have to search for at least 2-3 more before going to studying the models that are available to view.

ATB!