Fluoroscopy Flashcards
What is the purpose of fluoroscopy?
To obtain real time images of moving body parts and internal structures of patients
What are the two types of stationary fluroscopy tubes?
- Tube located above the table
- Tube located below the table
What is the role of the II or FPD in fluoroscopy?
To convert the x ray intenisty beam pattern (remnant beam) into a visible image which will then be displayed on a monitor
Where is the tube located? What type of fluoroscopy is this?
-Under the table
-Conventional fluoro
What is conventional floro?
Using an image intensifier
What is digital floro?
Using a flat panel detector
Where is the tube located? What type of floro is this?
- Under the table
- Digital floro
Where is the tube located? What type of floro is this?
-Above the table
-Image intensifier (conventional)
Where is the tube located? What type of floro is this?
-Above the table
-Digital floro
How far can the floro table move in the fowler position?
Up to 90 degees
How far can the floro tube move in the trandelanberg position?
Up to 30 degrees
What type of floro machine is this?
Mobile C arm with an image intensifier
What is a C-arm?
-A semi ciruclar C shaped arm with an x ray source fixed to one end and II to the other
-Cannot change the SID
What range of voltage does the mobile C arms use?
40-110 kV
True or false?
The image intensifier on mobile C arms aplifies high intensity x rays, thereby reducing the amount of radiation used.
False; the image intensifier on mobile C arms aplifies low intensity x rays, thereby reducing the amount of radiation used.
Define image intensification:
The process whereby a reduced amount of radiation is used to produce an image
When was the C arm introduced?
1960s
What are the 2 types of C arms?
- Mobile
- Stationary
True or false
C arms can move freely
False, although they can move in all 3 directions, the most common problem occurs when C arm used in the lateral position since the II cannot rotate byond the horizontal position
What are the different movements that a C arm can do?
- Vertical
- Swivel
- Horizontal
- Rotation
True or false?
The C arm can rotate around the AP and lateral views but most cannot rotae more than the horizontal position
True
How is the x ray beam positioned in relation to the anatomy for C arms?
Perpendicular
Can we collimate using a floro machine?
Yes
What is the last image hold?
There are 2 monitors; one for as we are taking the iamge, and one that shows the last image taken when we stop the exposure
What is pulse rate mode?
System preforming quick pusles of image to reduce dose
