Anatomical imaging Flashcards
This extremely shortwave electromagnetic radiation moves through the body, exposing a photographic plate to form a…
Radiograph
Bones and radiopaque dyes absorb the rays and create underexposed areas that appear white on the photographic film.
X-ray
To visualize a broken bone or to check for a cavity in a tooth.
X-ray
A major limitation of __ is that they give only flat 2D images of the body.
X-ray
The second oldest imaging technique, was first developed in the early 1950s as an extension of WWII sonar technology
Ultrasound
It uses high-frequency sound waves, which are emitted from a transmitter-receiver placed on the skin over the area to be scanned.
Ultrasound
The sound waves strike internal organs and bounce back to the receiver on the skin.
Ultrasound
This basic technology, the most important advances in the field occurred only after it became possible to analyze the reflected sound waves by computer.
Ultrasound
Once a computer analyzed the pattern of sound waves, the information is transferred to a monitor and visualized as a…
Sonogram image
One of the more advances is the ability of more advanced computer to analyze changes in position through “real-time” movements.
Ultrasound
Among other medical applications, this is commonly used to evaluate the condition of the fetus during pregnancy.
Ultrasound
CT
Computed tomography
Developed in 1972 and originally called computerized axial tomographic (CAT) scans,
CT
A low-intensity x-ray tube is rotated through a 360 degree arc around the patient.
CT
The computer then constructs the image of a “slice” through the body at the point where the x-ray beam was focused and rotated.
CT
DSA
Digital subtraction angiography
Is one step beyond CT scanning
DSA
A 3D radiographic image of an organ, such as the brain, is made and stored in a computer.
DSA
These dynamic computer images can be used, for example, to guide a catheter into a carotid artery during angioplasty
DSA
A procedure by which a tiny balloon compresses the material clogging the artery
Angioplasty
Directs radio waves at a person lying inside a large electromagnetic feild.
MRI
MRI
Magnetic Resonance Imaging
In MRI, what is the most important in this imaging system?
the alignment of hydrogen atom protons
These differences can be analyzed by computer to produce very clear sections through the body.
MRI
This technique is also very sensitive in detecting some forms of cancer far more readily than can a CT scan.
MRI
PET
Positron emission tomographic
Can identify the metabolic states of various tissues.
PET
This technique is particularly useful in analyzing the brain.
PET
In PET, what does the energy needed?
Breakdown of glucose (Blood sugar)
