Introduction to Radiology Flashcards
1
Q
Radiology uses
A
- Diagnose diseases
- Direct clinical management
- Guide therapeutic procedures
2
Q
X-Ray Overview
A
- Generates X-rays that pass through the body
- Photosensitive detectors produce 2D digital picture
- Grayscale shades based on tissue densities
3
Q
Computed Tomography (CT) Overview
A
- Rotating X-ray beams and multiple detectors
- Cross-sectional 3-D images on different planes
- Densities and internal anatomic details
- IV and PO contrast can be given
4
Q
Ultrasonography Overview
A
- Electrical impulses applied on a piezoelectric crystal
- Sound saves reflected back to crystal, collected by receiver
- Computer produces cross sectional images or video
- Portable, real time imaging
- No radiation risk
5
Q
Nuclear Medicine Overview
A
Radiopharmaceutical containing radioactive material
- Single Photon Emission CT (SPECT)
- 3D cross sectional imaging
- Common uses: cardiac functional scan, cerebral perfusion studies
- Positron Emission Tomography CT (PET-CT)
- Positron emission from specific radionuclides
- Mostly used in detecting metabolically active process such as cancer
6
Q
Magnetic Resonance Imaging (MRI)
A
- Magnetic field applies on spinning hydrogen atoms
- Superior soft tissue resolution
- Recent state-of-art applications
- No ionizing radiation risk
- IV contrast to enhance anatomy
