ZK

http://bssc.sel.sony.com/BroadcastandBusiness/docs/whitepapers/ssc_dc593_ae_final.pdf Thanks

Sony's spec sheet says this camera has a mechanical IR cut filter and external trigger for that cut filter (if I'm understanding the specs.) I looked at the photo but don't see any external connections for the trigger (the SSCE473 has a place on the back to insert a jumper.) How is it supposed to be hooked up on the 593? Thanks

Thanks ZK

1. That was a good thought but any type of MRI is impractical because we would need pictures with a sampling rate of 20hz for a period of 6 hours or more. Capitol and operating expenses would be prohibitive. (Medicare requires a minimum of 6 hours recording time for several reasons, one of which is it may take most of the night for obstructive sleep apnea to begin. Sounds strange but some people don't have problems until the last 1 or 2 hours of the sleep period.) If thermal would work, capitol and operating expenses would be low enough to be routinely covered by 3rd party payors. No one will touch a procedure if it can't be reimbursed. 2. Current methods tell nothing about what part of the airway is collapsing. They only infer "airway resistance," generally establishing that there is a problem, not what or where it is. If we can determine exactly what/where is the problem, we can use more specific, or more appropriate methods to treat it. Some people will be excluded from certain ENT procedures because there is clear evidence those procedures will have no positive effect at all. 3. I want to be able to obtain much more precise information while using less wires. Of course if it works everyone will be studying this for years to come. 4. Temperature changes. That's a question I cannot answer. I'll have to either research the information or experiment. I'm sure it would not be more than 20 degrees. However, all I really need to see is [a] temperature change or even a slight gradient. I don't have to measure temperature so much as just see a difference in temperature. ZK

Some guy (doctor) made a static model of the airway with an MRI that was really nice and informative. However, the MRI cannot obtain real time images...I suppose you could call it "streaming" images or video. In a perfect scenario, I would be able to record a thermal picture of the airway, with hot spots being tissue that is not cooled down by inspiratory and expiratory airflow. I suppose the cooler tissue could be seen in real time, thus "modeling" the open airway during its movement. That would be perfect. This would work if we had to place sensors actually on the skin but I'm hoping to just place a camera on one side of the neck. There are no current methods to do this. We have to rely on indirect measures of airflow, such as taping thermistors/thermocouples/pressure transducers into the nasal airflow or attaching a snug facemask hooked to a pneumotachometer or a different method that requires inserting an esophageal balloon to measure pressure swings...that one is not very pleasant, but is considered the "gold standard" for measuring airway resistance. So we have to rely on indirect methods of measuring things instead of being able to "see" exactly what the problem is. Some really smart scientists thought this stuff up...they did the best they could with what was available. There has got to be a better way. I would be happy even if we had to strap a camera to the pt's neck. It would not be any worse than what we have to do to them already.

Thanks Rory, http://bssc.sel.sony.com/BroadcastandBusiness/docs/whitepapers/ssc_e473_final.pdf I suppose I could could just run them on 12VDC if the AC produces too much voltage. I don't think the AC is adjustable like the DC output.

My dual power supply (12VDC/24 VAC Altronix #ALTV1224C) is producing 29 volts AC at the panel. 18 AWG wire runs are about 80 feet. Voltage drop is not much. Cameras are getting 28+ volts. The Sony SSC-E473 specifications read +-10% on 24 volts AC. Will running them at 28+VAC cause problems? Am I worrying too much? Thanks ZK

What size fuses should I use? The Altronix comes with 3.5 amp fuses on each output. So if the cameras only need .330 amps, should I use a .500 amp fast blow fuse? ZK

Thanks ZK

Here it is: http://bssc.sel.sony.com/BroadcastandBusiness/docs/whitepapers/ssc_e473_final.pdf Thanks ZK

The cameras I'm trying to install are rated 4.5 watts at 24VAC. They also will run on DC but the Watts @ 12VDC are not listed. My power panel is an Altronix ALTV615DC416UL. I was hoping to hook all the cameras up to it but am unsure as to what the camera current pull will be at 12VDC. How do I figure how much amperage a camera takes at 12VDC when all I have is 4.5 Watts rating at 24VAC? Thanks ZK