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
Death rates from pancreatic cancer predicted to rise in Europe in 2014
Pancreatic cancer is the only cancer for which deaths are...
medicalxpress.com
Genetics explain why some boys and girls are bigger than others
The influence of genetic factors on differences between children's Body...
medicalxpress.com
Bioethicists use theatrical narratives to bridge the gap between society and science
A pair of bioethics experts have added "playwright" to their...
medicalxpress.com
The best toxicology lab: a mouse with a human liver
A few years ago, Stanford pharmacogenomic expert Gary Peltz, MD,...
scopeblog.stanford.edu
How Great the Breast Ca Risk After Radiation as Child?
(MedPage Today) -- Women who survived childhood cancers treated with...
medpagetoday.com
Income Tax Fraud Appears to Target Docs
(MedPage Today) -- Hundreds of doctors across several states and...
medpagetoday.com
Stem cells in circulating blood affect cardiovascular health, study finds
New research suggests that attempts to isolate an elusive adult...
medicalxpress.com
Rural microbes could boost city dwellers' health
The greater prevalence of asthma, allergies and other chronic inflammatory...
medicalxpress.com
FDA Considers Ban on 'Aversive' Shock Devices
(MedPage Today) -- An FDA advisory committee will consider on...
medpagetoday.com
Big Data in Biomedicine technical showcase to feature companies’ innovations related to big data
In an effort to spark collaboration among thought leaders across...
scopeblog.stanford.edu
People with mild cognitive impairment may die at higher rate than people without condition
Mayo Clinic research studying the relationship between death and the...
medicalxpress.com
Marijuana use may increase heart complications in young, middle-aged adults
Marijuana use may result in cardiovascular-related complications—even death—among young and...
medicalxpress.com
People with more education may recover better from traumatic brain injury
People with more years of education may be better able...
medicalxpress.com
Iron consumption can increase risk for heart disease, study says
A new study from the Indiana University School of Public...
medicalxpress.com
Cyber buddy is better than 'no buddy'
A Michigan State University researcher is looking to give exercise...
medicalxpress.com
Study Suggests Heart Risk From Smoking Pot (CME/CE)
(MedPage Today) -- A French study provided support for an...
medpagetoday.com
Pollutants from coal-burning stoves strongly associated with miscarriages in Mongolia
Burning coal for domestic heating may contribute to early fetal...
medicalxpress.com
ASTRO issues guideline on the role of postoperative radiation therapy for endometrial cancer
The American Society for Radiation Oncology (ASTRO) has issued a...
medicalxpress.com
MERS Watch: Saudi Numbers Up Again
(MedPage Today) -- Saudi Arabia is reporting 11 new cases...
medpagetoday.com
Review: sugar-sweetened drink intake tied to elevated BP
(HealthDay)—Sugar-sweetened beverage (SSB) intake is associated with elevated blood pressure...
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 +