Siemens syngo CT 2005C 사용자 설명서

22

Pitch

In single slice CT:
Pitch = table movement per rotation/slice collimation

E.g.,: slice collimation = 5 mm,
table moves 5 mm per rotation, then pitch = 1.

With the Siemens Multislice CT, we differentiate 
between:

Feed/Rotation, the table movement per rotation

Volume Pitch, table movement per rotation/single 
slice collimation.

Pitch Factor, table movement per rotation/complete 
slice collimation.

E.g., slice collimation = 2 x 5 mm, 

 

table moves 10 mm per rotation,

 

then Volume Pitch = 2, Pitch Factor = 1.

With the SOMATOM Spirit, the pitch, slice, collimation, 
rotation time, and scan range can be adjusted. The 
pitch factor can be selected from 0.5-2.

Pitch Models

Pitch 1

Pitch 1.5

Pitch 2

C2-025.630.01.01.02_APPLICATIONGUIDE_SPIRIT.book  Page 22  Friday, April 8, 2005  9:55 AM