Quantcast Lesson 3. X-Ray Circuits and Tubes - Fundamentals of X-Ray Physics

Share on Google+Share on FacebookShare on LinkedInShare on TwitterShare on DiggShare on Stumble Upon
Custom Search
 
  
 
LESSON 3
X-RAY CIRCUITS AND TUBES
Section I. MAJOR X-RAY MACHINE CIRCUITS
3-1.
INTRODUCTION
The diagram of most medical x-ray units can be reduced to the following four
basic circuits:
a. Line-to-autotransformer circuits, which provides adjustments to overcome
variations of the normal incoming line voltage. It assists the operator to obtain specific
voltages for the unit's operation.
b. X-ray tube filament circuit, primary and secondary, which provides the
electrical power required to heat the x-ray tube filament, and means to vary the x-ray
tube filament temperature as required to control the tube current (quantity of radiation).
c. High-tension circuit, primary and secondary, which permits development of
the required high potential, its application across the x-ray tube, and adjustments which
enable the operator to control kilovoltage peak (quality of radiation).
d. Control circuit (also called the timer circuit or operating circuit, which initiates,
times, and terminates the x-ray production by controlling a switch that connects the
primary circuit of the high-tension transformer to the power source.
e. Other circuits are found in an x-ray machine, but those described here are the
ones essential for operation and control of both the quantity and quality of radiation
produced.
3-2.
LINE-TO-AUTOTRANSFORMER CIRCUIT
Since most practical x-ray units operate from standard service lines, the first
circuit energized in any x-ray unit is the one that connects to the service lines. This is
the circuit used to energize all other circuits in the x-ray unit. Before considering the
circuit, consider the characteristics of the incoming power line.
a. The power source voltage will vary from day to day or even from hour to hour,
depending on the demands placed upon it. At a time when the power drain is great, the
source voltage will be lower than normal. At other times, when demands on the source
are light, the voltage will be higher. The variation that follows the living cycle of the
community is commonly called line variation.
MD0950
3-2



Medical News
Noise from fireworks threatens young ears
(HealthDay)—The Fourth of July weekend is a time for celebrations...
medicalxpress.com
Many new teen drivers 'crash' in simulated driving task
(HealthDay)—Around four in 10 newly licensed teen drivers "crashed" in...
medicalxpress.com
Brain folding related to surface area and thickness, not number of neurons
(Medical Xpress)—A pair of researchers with Universidade Federal do Rio...
medicalxpress.com
New test could predict arthritis drug failure in patients
A study of 311 patients by The University of Manchester...
medicalxpress.com
Cohen's Brain Bits: Where is the Love?
(MedPage Today) -- How neurology could better serve the lesbian,...
medpagetoday.com
Documenting how dementia sufferers benefit from GPS
A brand new study of 200 dementia sufferers in Norway...
medicalxpress.com
It takes a special kind of cyclist to win the Tour de France
The Tour de France is the world's most famous cycling...
medicalxpress.com
Czech tour guide hospitalised with suspected MERS
A Czech tour guide has been hospitalised in Prague, suspected...
medicalxpress.com
Insurer Aetna to buy Humana in $35B deal
Aetna will spend about $35 billion to buy rival Humana...
medicalxpress.com
Friday Feedback: Children's Experiences of Violence
(MedPage Today) -- How great is the danger, and what...
medpagetoday.com
Slings Safe, Effective for Stress Incontinence (CME/CE)
(MedPage Today) -- Transobturator approach leads to fewer complications...
medpagetoday.com
Making waves with groundbreaking brain research
New research by Jason Gallivan and Randy Flanagan suggests that...
medicalxpress.com
What makes a good horror movie?
Like them or hate them horror films are big business...
medicalxpress.com
A Pharma Payment a Day Keeps Docs? Finances OK
(MedPage Today) -- Many doctors received industry payments 100 or...
medpagetoday.com
New treatments urgently needed for rare, disfiguring and painful skin condition
The first major scientific study into a rare, disfiguring inflammatory...
medicalxpress.com
Shoppers confused by 'traffic light' food labels, says study
Nutritional labels on food packaging are confusing to consumers and...
medicalxpress.com
Feeling impulsive or frustrated? Take a nap
Taking a nap may be an effective strategy to counteract...
medicalxpress.com
Lyme disease subverts immune system, prevents future protection
The bacteria that cause Lyme disease are able to trick...
medicalxpress.com
Americans embrace positive feelings, while Chinese prefer a balance
European Americans prefer positive feelings over negative ones while Chinese...
medicalxpress.com
Supercharging stem cells to create new therapies
Researchers at the University of Adelaide have discovered a new...
medicalxpress.com
 


Privacy Statement - Copyright Information. - Contact Us

comments powered by Disqus

Integrated Publishing, Inc.
9438 US Hwy 19N #311 Port Richey, FL 34668

Phone For Parts Inquiries: (727) 755-3260
Google +