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Ok thought I would ask. Does anybody have information or value of Scintillation Cameras, Thallium doped Sodium Iodide Scintillation Crystal's or the Photomultiplier tubes that or in these cameras. I have a few Will try post a picture.http://i782.photobucket.com/albums/y...g?t=1395386128
Wow, you're really coming up with a weird assortment of stuff these days. When bigburtchino posts, we google...
Believe it or not, I don't happen to have a scintillation camera around the house. Actually, I had never even heard of such a thing until now. But someone who does know something (we hope) has written a wiki entry (Gamma camera - Wikipedia) that explains how it works so that even I can understand it. Turns out it's a medical nuclear imaging device.
The photomultiplier tubes also have an entry (Photomultiplier - Wikipedia), and there's some more about how they work here: Vacuum tube - Wikipedia. Unlike a lot of other vacuum tubes, photomultiplier tubes still haven't been rendered obsolete by solid-state technology; they're used in applications that require detection of small numbers of photons. However, effective newer technologies have been developed, especially over the past 15 years, that are gradually overtaking them. There's a document with a really good explanation of photomultiplier tubes, as well as information on more-recent solid-state photodetectors, here: http://ric.uthscsa.edu/personalpages...ode_vs_PMT.pdf. (It's from 2003, though, so its discussion of the newer technologies is already outdated.)
Anyway, after all that, now I know that your picture shows the camera head of an Anger type scintillation camera (also called a gamma camera). A modern circular camera head usually has an array of 37-91 photomultiplier tubes (PMs) behind the crystal -- the more PMs, the higher the resolution. Here's a picture of the inside of a camera head which shows the arrangement of the PMs:
Attachment 1064
I have no idea what any of the components of that thing are worth, but there are listings for the purchase and sale of gamma camera parts, including PM tubes and some interesting-looking PCBs, at DOTmed: http://www.dotmed.com/parts/2/8/68/a...&att_row_num=1. A lot of the listings are by parts brokers, so one of them might be interested in a bulk purchase of whatever you have. If you go to the Forums section at DOTmed, you can see ratings of buyers & sellers, and they even have a blacklist so you'll know who to avoid. Since this is medical equipment, all the prices I saw were in the thousands of $.
You are good I'll check that reference out today! I did a EBay search of scintillation crystal this morning and was surprised at prices and sold crystals. I have three heads and parts for three more. I have a lot of PMT's (6 x 37 = 222) of various manufactures RCA, Amperex and S.R.C. Laboratories. Yes PMT's are still very much in use among some other vacuum tubes. With PMT's they use very high voltages that IC chips will never handle (shouldn't say never, but I did). some of the RCA PMT's have the RCA developmental sticker that was used to by RCA research facility in Pennsylvania. All of the PMT's have serial numbers my experience tells me s/n's have significance when research/development, performance and/or cost factors have to be tracked/recorded. Yes these were used in medical field, made initially by a company called Ohio Nuclear, they developed some of the first Gama cameras and medical CT scanners. I found these sometime ago and have made reference to finding this stuff in a few post before.
There's at least one guy at that site I mentioned who is offering Ohio Nuclear parts. Let me know what you discover over there.
I don't know if I should cry or laugh! I just did some quick searching on Dotmed, didn't see anything I have (only spent 10 minutes searching). I did recognize several PCB boards very similar to ones I have by same manufacturers. Why cry, when I first came into this equipment I had six units. Complete machines with all the interfaces, computers, recorders, cameras, arms, tubes, viewers, keyboards etc. etc. At the time my job was to get a bankrupt tenant out of a building and get building ready for a new tenant. I scraped that place out as fast as possible. Only thing I was concerned about was another empty commercial building. Sure I made a couple thousand on the scrap from that cleanout. Dotmed had very similar units selling for $6 to $10k each do I want to cry. Now the units I had was very old (mid 70's) nobody in this country would use, but looks like huge market for them overseas! I have 600 pounds plus PCB's and other items still will have to rethink this and may still have a good laugh. Flimits if Dotmed leads to good sale (some of those similar PCB's were selling for $1k plus) I owe you a beverage of your choice or two. As for me I have homework to do.
Maybe you can look at the listings there for this month, take note of the names of the companies selling this stuff, then check in their forum section to see which ones are considered most reputable. Then you could contact those sellers (who might just be brokers) and see what each would offer you for your entire inventory. If you get 2-3 offers, you can negotiate based on them, too.
Just an idea... Since I don't think you can test all the components you have, wholesaling to a "retail" seller/broker would probably be the right solution. Plus I don't know if you could ever turn over all that inventory at a place like eBay. I have access to eBay data going back a year, so let me know if you need me to check anything, such as prices and/or quantities that get sold.
I was wondering what that thing was, saw it in your photobucket link from the amp thread, just a few minutes ago.
Glad to see you posted what it was! I didn't want to have to try an describe the thing to ask you what it was...lol
Sirscrapalot - Feed your computer, or it'll eat your drivers.(Or posts...).
That haul had a lot of gold for the bucket and no doubt the weirdest was these camera head assemblies. It was and is the most time consuming as far as trying to figure it out. Flimits gave me the best reference and I'm still working that one. Glad I posted the picture.
...Flimits is a genius!! she could cash in on all the beverages we owe here and drink for a year =)Quote:
Originally Posted by bigburtchino