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1. Electricity
Three things helped pave the way to the
2. Vacuums
discovery of xrays
3. ImageRecording Materials
1831 - Michael Faraday induced electric
who discovered to the concept of electro-
current by moving a magnet in and out of
magnetic induction and how?
a coil
William Goodspeed produced a radi-
Who produced the first radiograph, but ograph in 1890
wasn't credited for x-ray discovery? • He was not credited with discovery of X
rays
William Roentgen
He became interested in cathode ray ex-
Who was credited of disocvering x -rays? periment with the Crooke's tube
• He worked with this tube until he discov-
ered xrays
Thomas Edison
• Primary concern was working with
Tell me about Thomas Edison: fluoroscopy
• Discovered the use of calcium
tungstate over barium platinocyanide
here certain elements spontaneously
Radioactivity emit ray or subatomic particles from mat-
ter
Pierre and
Marie Curie, and
What 3 were awarded the nobel prize for
Henri Becquerel
their work?
were awarded the Nobel prize for their
work
Are tubes now capable of producing ac-
True
curate multiple exposures?
durable and
Improvements in cassettes, film holders,
require less radiation -> make accurate
and image receptors have made them ...
diagnoses.
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Radiation Therapy - not diagnostic
- Therapy involves treating a patient who
is already diagnosed with a disease.
Nuclear Medicine radiopharmeceuticals
Specialized Areas
Sonography - sound waves
Special Procedures - Interventional ra-
diology Mammography - of the breast;
used to detect breast cancer; used to
screen large segments of the population
Tracers are a substance that emits radi-
ation
All of the radioactive compounds (trac-
ers) used in nuclear medicine, often
called radionuclides or radiopharmaceu-
ticals, are artificially produced.
Tracers
(think artificially produced; nuc. med) The nuclear medicine technologist might
also have to administer radioactive mate-
rial to patients to treat a specific disease.
uses high frequency sound waves to
form an image.
Transducer
Ultrasound beam
An image display on a cathode ray tube
or television monitor
Components of Sonography?
• Transducer serves two purposes:
- TRANSMITS sound in pulses and
bursts
- SENSES the echoes that are returning
from the previous pulse
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exams that may improve a patient's con-
dition
• Can help the patient not have to have
surgery -
Examples:
• removal of bile ducts or renal stones
• postoperative abscess drainage
• selective cancer therapy
Interventional radiology
Angiographic studies are performed:
- To demonstrate any vascular Abnormal-
ities
- Demonstrate Pathology in the sur-
rounding tissue and organs
To obtain 2D views of an internal organ
or structure,
(especially the brain and spinal cord)
To assess response to treatment,
(especially cancer chemotherapy or radi-
ation therapy.)
Purpose of MRI To assess sports-related injury to bones
and joints.