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• TOPIC: PRESENTATION ON X-RAY
AND X-RAY MACHINE.
PREPARED BY:
NOOR AFSHAN MEMON
FACULTY:
BIO-MEDICAL ENGINEERING
CLASS:
1ST YEAR ( D.A.E )
ROLL NO: 07
------------------------------
X-RAY MACHINE:
ELECTROMAGNETIC SPECTRUM:
What are x-rays??
Definition
X rays are electromagnetic
radiation that differentially
penetrates structures within the
body and creates images of
these structures on
photographic film or a
fluorescent screen. These
images are called diagnostic x
rays..
X-RAY MACHINE:
X rays are sometimes called
Roentgen rays after Wilhelm
Konrad Roentgen, who discovered
them in 1895. Roentgen called the
phenomenon X rays because the
symbol X stands for the unknown,
and he was unable to determine the
nature of the radiation..
DISCOVERY OF X-RAYS:
Diagnostic x rays are useful in detecting abnormalities
within the body. They are a painless, non-invasive way to
help diagnose problems such as broken bones, tumors,
dental decay, and the presence of foreign bodies.
PURPOSE OF X-RAYS:
X rays pass easily through air and soft tissue of the
body. When they encounter more dense material,
such as a tumor, bone, or a metal fragment, they are
stopped. Diagnostic x rays are performed by
positioning the part of the body to be examined
between a focused beam of x rays and a plate
containing film. This process is painless. The greater
the density of the material that the x rays pass
through, the more rays are absorbed. Thus bone
absorbs more x rays than muscle or fat, and tumors
may absorb more x rays than surrounding tissue. The
x rays that pass through the body strike the
photographic plate and interact with silver molecules
on the surface of the film.
HOW DO X-RAYS WORK??
ONCE THE FILM PLATES HAVE BEEN PROCESSED,
DENSE MATERIAL SUCH AS BONE SHOWS UP AS
WHITE, WHILE SOFTER TISSUE SHOWS UP AS
SHADES OF GRAY, AND AIRSPACES LOOK BLACK. A
RADIOLOGIST, WHO IS A PHYSICIAN TRAINED TO
INTERPRET DIAGNOSTIC X RAYS, EXAMINES THE
PICTURES AND REPORTS TO THE DOCTOR WHO
ORDERED THE TESTS. PLAIN FILM X RAYS
NORMALLY TAKE ONLY A FEW MINUTES TO
PERFORM AND CAN BE DONE IN A HOSPITAL,
RADIOLOGICAL CENTER, CLINIC, DOCTOR'S OR
DENTIST'S OFFICE, OR AT BEDSIDE WITH A
PORTABLE X-RAY MACHINE.
HOW AN X-RAY MACHINE WORKS:
BLOCK DIAGRAM OF AN X-RAY MACHINE:
• Mammograms: are fixed plate x rays that are
designed to locate tumors within the breasts. Dental x
rays are designed to locate decay within the tooth.
• Fluoroscopy: is a special x-ray technique that
produces real-time images on a television monitor.
With fluoroscopy, contrast material is injected into a
blood vessel. The physician can then watch the real-
time movement of the contrast material to determine
if there are blockages in circulation..
SPECIAL TYPES OF X-RAY PROCEDURES:
• Computed tomography (CT-scan):
scan works on the same principles as fixed
plate x rays, with a CT scan, an x ray tube
rotates around only d the individual,
taking hundreds of images that are then
compiled by a computer to produce a
two-dimensional cross section of the
body.
• magnetic resonance
imaging (MRI):
uses a powerful magnetic field, radio
frequency pulses and a computer to
produce detailed pictures of organs, soft
tissues, bone and virtually all other
internal body structures.
CT-scan imaging MRI diagnostic imaging
Fluoroscopy diagnostic prevision
imaging
Enhanced spectral mammography
HOW X RAYS ARE PERFORMED??
Fixed plate x rays are extremely common diagnostic
tests. A trained x-ray technologist takes the x ray. The
individual is first asked to remove clothing and jewelry
and to wear a hospital gown. The x ray technologist
positions the patient appropriately, so that the part of
the body to be x rayed will be between the x-ray beam
and the film plate. Usually the individual either lies on
an adjustable table or stands. Parts of the body that
are especially sensitive to damage by x rays (for
example, the reproductive organs, the thyroid) are
shielded with a lead apron. Lead is very dense and
effectively protects the body by stopping all x rays.
Sometimes parents can stay with children during an x
ray, unless the mother is pregnant, in which case she
must protect the fetus from x-ray exposure.
Although unnecessary exposure to
radiation should be avoided, the low
levels of radiation one is exposed to
during an x ray does not cause harm with
a few exceptions. Pregnant women
should not have x rays unless in
emergencies the benefits highly outweigh
the risks. Exposure of the fetus to x rays,
especially during early pregnancy can
increase the risk of the child later
developing leukemia. Body parts not
being x rayed should be shielded with a
lead apron, especially the testes, ovaries,
and thyroid.
PRECAUTIONS:
No special preparation is needed for fixed plate x rays unless
contrast material is used. When x rays are scheduled that
involve the use of contrast material, the physician will give
specific instructions for preparation. For example, in a lower GI
series, the individual may have to fast and use
special laxatives to cleanse the bowel before swallowing the
contrast material. Parents can prepare children for x rays be
explaining what will happen and that these tests are short and
painless.
PREPARATION:
Little aftercare is needed following an x ray. In
complicated x rays where contrast material is
injected into a blood vessel, the individual
may need to remain under medical care for a
short while to assure that there is no allergic
reaction to the contrast material and recovery
is complete.
AFTERCARE:
THE END
THANK YOU!!!!!!!

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x-ray machine

  • 1. • TOPIC: PRESENTATION ON X-RAY AND X-RAY MACHINE. PREPARED BY: NOOR AFSHAN MEMON FACULTY: BIO-MEDICAL ENGINEERING CLASS: 1ST YEAR ( D.A.E ) ROLL NO: 07 ------------------------------
  • 3. What are x-rays?? Definition X rays are electromagnetic radiation that differentially penetrates structures within the body and creates images of these structures on photographic film or a fluorescent screen. These images are called diagnostic x rays.. X-RAY MACHINE:
  • 4. X rays are sometimes called Roentgen rays after Wilhelm Konrad Roentgen, who discovered them in 1895. Roentgen called the phenomenon X rays because the symbol X stands for the unknown, and he was unable to determine the nature of the radiation.. DISCOVERY OF X-RAYS:
  • 5. Diagnostic x rays are useful in detecting abnormalities within the body. They are a painless, non-invasive way to help diagnose problems such as broken bones, tumors, dental decay, and the presence of foreign bodies. PURPOSE OF X-RAYS:
  • 6. X rays pass easily through air and soft tissue of the body. When they encounter more dense material, such as a tumor, bone, or a metal fragment, they are stopped. Diagnostic x rays are performed by positioning the part of the body to be examined between a focused beam of x rays and a plate containing film. This process is painless. The greater the density of the material that the x rays pass through, the more rays are absorbed. Thus bone absorbs more x rays than muscle or fat, and tumors may absorb more x rays than surrounding tissue. The x rays that pass through the body strike the photographic plate and interact with silver molecules on the surface of the film. HOW DO X-RAYS WORK??
  • 7. ONCE THE FILM PLATES HAVE BEEN PROCESSED, DENSE MATERIAL SUCH AS BONE SHOWS UP AS WHITE, WHILE SOFTER TISSUE SHOWS UP AS SHADES OF GRAY, AND AIRSPACES LOOK BLACK. A RADIOLOGIST, WHO IS A PHYSICIAN TRAINED TO INTERPRET DIAGNOSTIC X RAYS, EXAMINES THE PICTURES AND REPORTS TO THE DOCTOR WHO ORDERED THE TESTS. PLAIN FILM X RAYS NORMALLY TAKE ONLY A FEW MINUTES TO PERFORM AND CAN BE DONE IN A HOSPITAL, RADIOLOGICAL CENTER, CLINIC, DOCTOR'S OR DENTIST'S OFFICE, OR AT BEDSIDE WITH A PORTABLE X-RAY MACHINE.
  • 8. HOW AN X-RAY MACHINE WORKS:
  • 9. BLOCK DIAGRAM OF AN X-RAY MACHINE:
  • 10. • Mammograms: are fixed plate x rays that are designed to locate tumors within the breasts. Dental x rays are designed to locate decay within the tooth. • Fluoroscopy: is a special x-ray technique that produces real-time images on a television monitor. With fluoroscopy, contrast material is injected into a blood vessel. The physician can then watch the real- time movement of the contrast material to determine if there are blockages in circulation.. SPECIAL TYPES OF X-RAY PROCEDURES:
  • 11. • Computed tomography (CT-scan): scan works on the same principles as fixed plate x rays, with a CT scan, an x ray tube rotates around only d the individual, taking hundreds of images that are then compiled by a computer to produce a two-dimensional cross section of the body. • magnetic resonance imaging (MRI): uses a powerful magnetic field, radio frequency pulses and a computer to produce detailed pictures of organs, soft tissues, bone and virtually all other internal body structures.
  • 12. CT-scan imaging MRI diagnostic imaging Fluoroscopy diagnostic prevision imaging Enhanced spectral mammography
  • 13. HOW X RAYS ARE PERFORMED?? Fixed plate x rays are extremely common diagnostic tests. A trained x-ray technologist takes the x ray. The individual is first asked to remove clothing and jewelry and to wear a hospital gown. The x ray technologist positions the patient appropriately, so that the part of the body to be x rayed will be between the x-ray beam and the film plate. Usually the individual either lies on an adjustable table or stands. Parts of the body that are especially sensitive to damage by x rays (for example, the reproductive organs, the thyroid) are shielded with a lead apron. Lead is very dense and effectively protects the body by stopping all x rays. Sometimes parents can stay with children during an x ray, unless the mother is pregnant, in which case she must protect the fetus from x-ray exposure.
  • 14. Although unnecessary exposure to radiation should be avoided, the low levels of radiation one is exposed to during an x ray does not cause harm with a few exceptions. Pregnant women should not have x rays unless in emergencies the benefits highly outweigh the risks. Exposure of the fetus to x rays, especially during early pregnancy can increase the risk of the child later developing leukemia. Body parts not being x rayed should be shielded with a lead apron, especially the testes, ovaries, and thyroid. PRECAUTIONS:
  • 15. No special preparation is needed for fixed plate x rays unless contrast material is used. When x rays are scheduled that involve the use of contrast material, the physician will give specific instructions for preparation. For example, in a lower GI series, the individual may have to fast and use special laxatives to cleanse the bowel before swallowing the contrast material. Parents can prepare children for x rays be explaining what will happen and that these tests are short and painless. PREPARATION:
  • 16. Little aftercare is needed following an x ray. In complicated x rays where contrast material is injected into a blood vessel, the individual may need to remain under medical care for a short while to assure that there is no allergic reaction to the contrast material and recovery is complete. AFTERCARE: