August 2009
Monthly Archive
Tue 18 Aug 2009
Posted by heaven under
UncategorizedComments Off
Author:
Lponce22
SubjectHi
Posted: Thu Aug 13, 2009 10:25 pm (GMT -4)
Topic Replies: 15
Hello Now that you have graduated from West coast ultrasound institute have you found a job? how was your externship?
| echo hello hello wrote: |
I am sad that I wasted my money at WCUI Ontario Campus. I will graduate in three weeks and don't have the knowledge or the skills to even go into an externship. The environment is very stressful and pressured they want you to memorize without really knowing why. I do not approve of their method of training its all about passing test and not in knowing what you are doing. I wouldnot recommend this school.  |
Tue 18 Aug 2009
Posted by heaven under
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Author:
karen016@live.com
SubjectSalary
Posted: Thu Aug 13, 2009 10:29 am (GMT -4)
Topic Replies: 0
What is average salary for CT techs. in Florida?
Tue 18 Aug 2009
Posted by heaven under
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Author:
paddy
Posted: Thu Aug 13, 2009 6:22 am (GMT -4)
Topic Replies: 1
http://www.studystack.com/Radiology
You can try this site.
Tue 18 Aug 2009
Posted by heaven under
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Author:
JDinSD
Posted: Mon Aug 17, 2009 12:37 pm (GMT -4)
Topic Replies: 1
what part of socal you in?
San Diego:
Pima Medical Institute
Mesa College (Community)
Los Angeles:
Maric aka Kaplan college (North Hollywood)
all these are full scope
Tue 18 Aug 2009
Posted by heaven under
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Author:
wvaio
Posted: Sun Aug 16, 2009 8:16 pm (GMT -4)
Topic Replies: 1
I'll see if I can help you with this.
These are the factors that contribute:
1. Less than 1% of the kinetic energy of the electrons coming from cathode to anode will produce X-rays. 99% will be transferred to heat.
2. Xrays are polyenergetic. Ranging from 0 to Emax(kVp).
3. Filtration is added to reduce the number of low energy photons emitted from the tube; therefore, raising the average effective photon energy and reducing patient dose.
4. Not all projectile electrons from the cathode will have the peak potential energy, due to voltage ripple this is inherent in any generator.
5. Many low energy X-rays will be absorbed by the target. i.e. the anode heel effect.
6. The target is thick, and many of the Brems interactions happen after the projectile electrons have interacted previously. Every interaction causes a further loss of potential energy.
As for the difference between effective and average photon, the terms are NEARLY interchangeable. Effective means leaving the tube toward the patient. Average could be used to describe the energy at any given point. There must be another word attached to it to describe the point of quantification, because there is filtration between production and exit.. They are usually used together as average effective energy.
X-ray production is extremely inefficient, and these are the main reasons why.One more final thing to remember is that MOST of the X-rays produced will possess an energy 1/3 of the kVp. Hope this helps.
Wvaio
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