MRI - MIDTERM L1 Flashcards
(50 cards)
MRI is used to visualize the _______ structures of the body in _________
- Internal
- High Detail
MRI is valuable for imaging soft tissues like the ______, ______, ______, and ________
- Brain
- Spinal Cord
- Muscles
- Organs
What type of MRI uses different tissue properties to generate detailed images of soft tissues, and visualize anatomic structures such as the brain, spinal cord, and joints to verify diseases such as Brain Tumors, Stroke, or Spinal Cord injuries ?
Structural MRI (Anatomical MRI)
A Structural MRI variant which produces high-resolution images where fat appears bright, and white fluid appears dark
T1-Weighted Imaging (T1W1)
A Structural MRI variant sensitive to fluid and is often used to detect pathology wherein fluid appears bright, useful for identifying edema or tumors
T2-Weighted Imaging (T2W1)
It is an MRI classification which measures and maps beam activity by detecting changes in blood flow, based on the principle that brain areas with higher activity require more oxygen.
Functional MRI (fMRI)
The acronym BOLD stands for ________
Blood Oxygen Level Dependent
(Umayos ka hindi to ano)
fMRI is commonly used for research of neurological conditions such as ______ and _____
- Epilepsy
- Alzheimer’s Disease
This MRI measures and assesses movement of water molecules within tissues to visualize the orientation and integrity of white matter pathways and for imaging white matter tracks in the brain
Diffusion MRI (Diffusion Tensor Imaging, DTI)
The common applications for Diffusion MRI include the following EXCEPT:
A. Multiple Sclerosis
B. Traumatic Brain Injury
C. Stroke
D. Surgery Planning
E. NOTA
E. NOTA
It is a non-invasive technique used to visualize blood vessels and assess conditions such as aneurysms, blockages, or arterial malformations.
Magnetic Resonance Angiography
TRUE OR FALSE
MR Angiography can only be performed if there is a contrast agent.
FALSE
MR Angiography can be performed WITH OR WITHOUT CONTRAST AGENTS.
What MR Angiography variant is used to visualize arteries without the need of a contrast agent ?
Time-of-Flight (TOF)
This MR Angiography variant uses a contrast agent to enhance the visualization of veins and smaller vessels
Contrast-enhanced MRA
It measures the chemical composition (concentration) of metabolites within tissues, giving insights into the metabolic changes in the body
Magnetic Resonance Spectroscopy
It specializes in imaging the heart and blood vessels, particularly for assessment of the structure and function of the heart, including the myocardium, blood vessels, and heart valves.
Cardiac MRI
What are the common applications of Cardiac MRI (4):
- Cardiomyopathy
- Myocardial Infarction
- Congenital Heart Defects
- Valve Disorders
It involves the use of an oral contrast agent to highlight the intestines, along with MRI to capture detailed images of the GI tract.
MR Enterography
The following are the clinical indications of MR Enterography EXCEPT:
A. Crohn’s Disease
B. Inflammatory Bowel Disease
C. Multiple Sclerosis
D. Bowel Obstructions
C. Multiple Sclerosis
The MRI machine generates a strong magnetic field which aligns the hydrogen nuclei in the body along the direction of the field.
Magnetic Field Application
A _______ is applied which temporarily disrupts the alignment of the hydrogen nuclei
Short RF Pulse
The strong magnet is defined as the __________
Core of the MRI System
These coils create varying magnetic fields, allowing for spatial encoding of the MR signals and enabling the creation of detailed, cross-sectional images.
Gradient Coils
