1
Q
Developed photographic subtraction where bone structure can be subtracted/ cancelled out
A
Ziedses des Plantes
2
Q
Matching of 1 image over another so that bony structures are precisely superimposed
A
Registration
3
Q
Reverse-tone duplicate of radiographic image (black to white & vv); single emulsion film is exposed traditionally
A
Reversal film/ Positive mask/ Diapositive
4
Q
Film showing bones only; exposed before CM is injected
A
Zero film/ Base film (Control film)
5
Q
Used to duplicate radiographs
A
Contact printer
6
Q
Used for registration of images
A
Horizontally oriented illuminator
7
Q
- Film used for masking a reversal mask
- Film for photographic prints of the final subtracted image
A
- Subtraction mask film (SMF)
- Subtraction print film (SPF)
8
Q
Reasons why manual subtraction is no longer used
A
- Tedious procedure
- Very messy
- Limited diagnostic value due to static pictures
- Requires a specific type of subtraction films
Very LRT
