0
X-Ray
Invented by Wilhelm Conrad Röntgen in 1895, X-ray imaging is used in hospitals to detect fractures to bone, as well as abnormalities to soft tissues.
1,826 Questions
cutaneous...wrong, the answer is inhalation
What is the purpose of vacuum in x ray tube?
Section II. PRODUCTION OF X-RAYS
1-6. PARTS AND COMPONENTS OF THE DENTAL X-RAY MACHINE
- General. The standard structural parts of the dental x-ray machine include a control panel (usually mounted behind a protective shield); a tube head, which houses the dental x-ray tube; and a flexible extension arm from which the tube head is suspended (see figure 1-1).
- The Control Panel. The components of the control panel are switches, dials, gauges, and lights. Basically, each control panel has the same function, the arrangement and location of these components will differ, depending upon the make, model, and year of construction of the dental x-ray unit. An operator's manual is issued with each unit. The operator should study it until he is familiar with its operational capability.
- The Extension Arm. The tube head is attached to the metal extension arm by means of a yoke that can revolve 360 degrees horizontally where it is connected. The construction of the yoke also provides vertical movement as well.
- The Tube Head. Inside the metal tube housing is the x-ray tube. The diagram in figure 1-2 represents a dental x-ray tube head and a dental x-ray tube. This tube emits radiation in the form of photons (photons will be discussed in Lesson 2) or x-rays. X-ray photons expose the film. In addition to exposing the film, it also exposes the patient to radiation. Unless certain protective measures are taken, the x-ray technician may also be exposed.
Figure 1-1. A representation of a control panel, x-ray tube head, and extension arm.
Figure 1-2. Dental x-ray tube head and dental x-ray tube.
1-7. THREE STEP PROCESS OF X-RAY PRODUCTION
- The First Step. The first step in x-ray production is to turn on the machine. (If there is doubt on the part of the x-ray technician concerning the operation of the unit, reference should be made to the operator's manual.) When the unit is turned on, the filament of the cathode is heated by electrical current, causing it to emit electrons (see figure 1-3).
- The Second Step. For the second step of this three-step process, high voltage is passed across the x-ray tube. When this is done, the electrons or electron cloud from the filament are drawn across the opening toward the anode. The anode is made of tungsten and is sometimes called the tungsten target. Figure 1-4 depicts the electrons speeding toward the anode (tungsten target).
- The Third Step. The third and final step in this three-step process is the collision of electrons with the anode (tungsten target). This rapid deceleration of electrons produces x-rays, also referred to as photons. Figure 1-5 represents electrons striking the anode (tungsten target) and producing x-ray photons.
Figure 1-3. Tube head with the filament of the cathode emitting electrons.
Figure 1-4. Electrons speeding toward the anode (tungsten target).
Figure 1-5. Electrons striking the anode (tungsten target) producing x-ray photons.
What is given to patients before they receive digestive system x-rays?
For a majority of MRI exams, the patient does not need any medication before or during the exam. Some exams require a contrast agent, which is typically injected and is extremely useful for visualizing blood flow. Sometimes a patient will be prescribed an MRI both without, and then with, contrast, in order to compare the images.
Some patients who are claustrophobic may be prescribed a sedative, or even be anesthetized to receive an MRI exam.
The MRI process, itself, does not require any medication in order to work. It is only that some particular pathologies or anatomies are better visualized in a shorter period of time through the use of contrast agents.
How old do you have to be to have an X-ray?
yes, pretty much any one can get xrays. some people babies should not though because they may be at risk from the radiation. you should not get to many xrays because it could be a risk to your health.
What is the annual salary for X-ray tech?
I depends on were you live but the average starting pay for an X-ray Tech is $11-19 hourly and for a Radiologic Tech $24-29 hourly. You can also get this information from the US Dept of Labor or the ARRT website.
What sort of things are difficult to image in x rays?
The flesh and body tissue. This is because it lacks in density and so the X-rays go right through it where as the the bones show clearly because it is high in density.
What are 10 good things about x-rays?
The only benefit of having an x-ray is that you obtain a more accurate diagnosis. There is no physiological benefit from the x-ray itself, except when used in radiation therapy at very high dosages to damage cancerous cells.
There are different ways to measure UV radiation. The mosty common one is by using an index number, which gives the approxiate danger level for humans. This index number is a result from taking different wavelengths into account, shorter wavelengths being more dangerous to cell structure than longer ones.
A better way however is to give the mW/(nm m2) (milliwatt per square meter per nanometer of wavelength).
For the exact calculations and more information, see:
http://www.epa.gov/sunwise/uvicalc.html
http://en.wikipedia.org/wiki/Ultraviolet_index#Definition
How much does x ray technicians make?
It depends on a number of factors (location, level of experience, facility, etc).
I work in the OR and ER of an urban hospital in NJ, and my hourly base (with 2 years of experience) is $30/hour.
Two of the great things about the field is the many modalities/directions you can go in (x-ray, ct, mri, ultrasound, nuclear medicine, etc) and the variety of places you can work (hospitals, outpatient imaging centers, surgery centers, orthopaedic clinics, etc). These all contribute to the salary.
Why should pregnant women not normally be given an x ray?
X-rays are harmful rays. these rays do not so much affect an adult because of his developed body systems. But Doctors don't perform X- rays on pregnant women because it may affect the baby growing inside. The baby may suffer from deformities of the body parts.
What is the typical speed of a wave in x-rays?
X-rays are a form of electromagnetic radiation just like visible light. They travel at the same speed (299,792 km/s in a vacuum) as visible light. The only difference is that x-rays have a much higher frequency (~10^18 Hz) and hence a much shorter wavelength (~1 nm) than visible light.
X-rays are what kind of energy?
An X-ray is a highly energetic form of electromagnetic radiation. It is like visible light, only of higher frequency (shorter wavelength).
You are a bit confused. They don't. If you mean "why are X-rays held up to the light to see details," that's different. X-ray film turns dark when irradiated. Then the film is developed so that people can examine it. I don't agree. X-Rays are a form of light. A light, precisely. However, they do not "use" light waves, and the person above me is wrong in that sense, and does not know that X-Rays are a form of light. They don't use light waves, they are simply in that form - light waves - because that is how they work. I don't know quite how to explain it, but it is not a sound wave or any other type of wave, only light. They are very small, which is why X-Rays show your bones. However, they have radiation effects. (Notice that radiate means to radiate heat, which comes from light?) These effects can only happen with light waves.
How does giving X-Ray his second find affect he status with the boys?
you already "KNOW". bY SPANKING THEM and licking them in their Face......
Would X-rays or infrared light have more energy?
Electromagnetic waves comes in different frequencies; at higher frequencies, the wavelength is shorter. So, X-rays have a shorter wavelength, a higher frequency, and more energy per photon, than infrared light.
Yes living x-rays are a danger to living organisms. x-rays cause ion pairs the damage molecular pairs
Why is bone evident in an X-ray?
Bone is evident on an x-ray because it is denser than the surrounding muscles and fat. This means that the bone stops some of the x-ray beams from reaching the x-ray film, leaving that area on the film white. That is why bone x-rays appear white on a black/grey background.
Why is it dangerous to X-ray a human fetus?
A human fetus is still early in the stages of development and if hit with X-rays can cause damage or defects in the fetus' body. The radiation could cause many problems within individual cells, including the damaging of receptor proteins which could cause cancerous tumors to grow. A human fetus, or any other fetus, is more susceptible to radiation damage because many of their cells are still stem cells (cells that can continue to divide endlessly and haven't been defined as a certain cell). In other words these cells aren't specified yet, they could become skin cells or stomach cells so radiation could mutate them and since they can divide easily the defect could easily spread.
What is the procedure for a positive ppd and a normal chest xray?
How often you get a chest x-ray is dependent on signs and symptoms following a positive PPD read. If no signs and symptoms are present once every ten years is standard. They also have the ability now to have blood drawn and tested yearly for Healthcare workers as opposed to chest x-rays. If signs and symptoms are present then your family Dr will do labs along with chest x-ray.
Fluoroscopy is the visualization of body parts in motion by projecting x-ray images on a luminous fluorescent screen (fluor/o means glowing, and -scopy means visual examination). Luminous means glowing.
