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30 Cards in this Set

  • Front
  • Back
Name the 3 ways x-rays are used as diagnostic tests
radiography
flouroscopy
tomography
Radiography
like negatives of photos. X rays go through body and reach film on other side, turning it black. So white on xray = too dense for x-ray to pass through (like bone)
How would
air
fat
water
bone
....all look on a radiograph
air = blackish
fat = dark grey
water = light grey
bone = whitish
Fluoroscopy
x-rays used to obtain real time moving images of internal structures
(e.g. cardiac cath)
x-ray tube points at part of body we want moving image of. A continuous x-ray image.
Tomogram/computed tomography
Computed tomography = CT scan
3d cross sectional views of body structures are obtained.
X-ray tube moves along with film down part of body we want image of.
posteroanterior (PA) CXR
the conventional CXR. The film is at the patients front.
The part of the patient that needs to be studied on an x-ray should be next to the ______
Film
Anteroposterior (AP) CXR
The common view for portable bedside CXR's
The normal heart shadow on a CXR is ____ % or less the width of the thorax
50%
In Heart Failure, on a CXR the heart shadow is enlarged to greater than ____ % the width of the thorax
50%
The 3 most common abnormalities diagnosed with a CXR are...
pneumonia
atelectasis
pneumothorax
The most common cause of infectious death in the elderly is _______ .
Pneumonia
KUB
a radiography that focuses on the kidneys, ureter and bladder
3 way abdominal radiograph
obtained with pt flat, sidelying and upright. Often the first step in assessing for a variety of abdominal probems.
barium swallow
used for radiographs of the upper GI tract.
Non-water soluble so not absorbed my GI tract.
barium swallow can dx. what?
esophageal varices
swallow problems (with fluoroscopy)
stomach - tumors, ulcers
small bowel series radiographs
taken of small bowel as barium swallow passes through
the definitive test for gastric/duodenal ulcers
endoscopy
barium enema
radiographic examination of lower colon
lower intesntinal problems that can be visualized on barium enema
tumor
strictures (narrowing)
polyps (abnormal mucous membrane growth)
diverticula (outcropping pockets)
cholangiogram
the imaging of the bile duct with xrays, contrast medium is used
pyelogram
imaging of renal pelvis and ureter with xrays, contrast medium used
routine way to detect fractures is ______
skeletal radiograph
Baseline mammogram should be performed at what age?
35-40 yrs old
myelogram
xray of subarachnoid space of spinal column (air/dye used as contrast medium)
4 types of scans that visualize 3d cross sectional views of body
CT
MRI
PET
SPECT
2 disadvantages of CT scan
1. Cost
2. time exposed to radiation
MRI advantage and disadvantage (compared with CT, PET, SPECT)
no radiation but costs more than CT scan (can't have implanted devices)
great for CNS system observation
Advantages/disadvanges to PET and SPECT (over CT & MRI)
detail metabolic function rather than structure, require tiny amounts of radioisotopes so minimal exposure
PET=most expensive, not widely available
SPECT=costs same as CT brain scan
CT scan looks almost all types of tissue except _____
nerves