What are LTV rays? It is mentioned in an article, but it doesn't describe what they are, and I can't find it through google. Thanks.

Perhaps you mean ITV rays.

http://72.14.205.104/search?q=cache:7MOnrnt5uM4J:findarticles.com/p/articles/mi_qa3921/is_200006/ai_n8895582+LTV+rays+definition&hl=en&ct=clnk&cd=1&gl=us&ie=UTF-8