AI Study Guide 3 Flashcards
What projections of the breast are performed as part of routine screening mammography?
Craniocaudal (CC), Mediolateral Oblique (MLO)
How many projections are required from complete examination of both breasts when implants are present?
8
Why is hydrogen used for imaging in MRI?
Most abundant element , Strong magnetic properties
In MRI, this is the release of energy by excited nuclei as a result of interaction among themselves
Spin-Spin Relaxation (T2)
In MRI, this is the release of energy by excited nuclei to their general enviorment
Spin-Lattice Relaxation (T1)
The most common radionuclide used in nuclear medicine is
Technetium-99 (99m TC)
__________ are used in nuclear medicine to keep scattered rays form entering the camera
Collimators
with the intergration of strong magnets and ready frequencies, high resolution soft tissue imaging in multiple planes became available with that modality
MRI
What modality uses gamma emitting radionuclide to produce images?
NM
Molecular imaging advancements using a positron emitting radiopharmaceutical resulted in what modality?
PET
What specialized imaging technique provides cross sectional images at a low cost is readily available ad has the ability to differentiate cystic solids and complex tissues
US
What is the modality of choice to image the central nervous system?
MRI
Ionizing radiation that is emitted from the patient to produce images is the basis of what modality?
NM
In NM, the patient is injected or ingests the ionizing radiation through a
Radiopharmaceutical
What device is used in NM to detect the ionizing radiation being emitted from the patient to produce an image?
Gamma Cameras
The first modality capable of producing images without the use of ionizing radiation was
US
The major advantage of ultrasound for imaging is that there are___________ adverse effects on human tissues.
NO
What atom’s energy is manipulated to produce MRI Images?
Hydrogen
During NM imaging, increased radionuclide uptake produces a ________ on the image
Hotspot
What is another term for 3D breast imaging?
Digital Breast Tomography (DBT)
What is the angle of the central ray for the mediolateral oblique projection the breast?
Angle of pectoral muscle 30-60
What is the recommended frequency of screening mammography for women over 40 years of age?
Yearly
The amount of time required for a radionuclide to decay to half of its original activity is called
Half-life
