RAD 100 Exam 1
1. · When and who discovered x rays, fluoroscopy: o Wilhelm
Conrad Roentgen:
x-rays
o Thomas Edison: invented first fluoroscope
2. · Review the characteristics of xrays: o Cannot be refracted
by a lens o Not detectable by human senses
o Can ionize matter
o Travel in straight lines
o Can penetrate matter that is opaque to light o Causes certain
crystals to flow (fluoresce)
3. · Review the parts of the xray machine and xray tube:
anode cathode
filaments focusing cup target
anode stator
, 4. · What grids or buckys are used for and when are they
used?: o Grids and buckys: put between patient and IR to prevent
scatter radiation from degrading the image
5. · What departments use ionizing radiation: - X-Rays
- Radiation Therapy
- Mammogram
- CT Scan
- Pet Scan
- Nuclear Medicine
- Therapeutic X-Ray
- Gamma rays
- Diagnostic X-Rays
6. · How do we calculate mAs?: o mA and exposure time (mAs
when combined)
affect the quantity only
7. · What is an intensifying screen, when and why do we use
them?: converts the x-ray energy into light, which reaches the
film and forms the latent image
1. · When and who discovered x rays, fluoroscopy: o Wilhelm
Conrad Roentgen:
x-rays
o Thomas Edison: invented first fluoroscope
2. · Review the characteristics of xrays: o Cannot be refracted
by a lens o Not detectable by human senses
o Can ionize matter
o Travel in straight lines
o Can penetrate matter that is opaque to light o Causes certain
crystals to flow (fluoresce)
3. · Review the parts of the xray machine and xray tube:
anode cathode
filaments focusing cup target
anode stator
, 4. · What grids or buckys are used for and when are they
used?: o Grids and buckys: put between patient and IR to prevent
scatter radiation from degrading the image
5. · What departments use ionizing radiation: - X-Rays
- Radiation Therapy
- Mammogram
- CT Scan
- Pet Scan
- Nuclear Medicine
- Therapeutic X-Ray
- Gamma rays
- Diagnostic X-Rays
6. · How do we calculate mAs?: o mA and exposure time (mAs
when combined)
affect the quantity only
7. · What is an intensifying screen, when and why do we use
them?: converts the x-ray energy into light, which reaches the
film and forms the latent image
