• Topic ID: id_15460163
  • Version: 3.0
  • Date: Jan 20, 2020 8:36:14 PM

How to Setup Low Signal correction for SmartPrep

Prerequisites

Overview

On LightSpeed VCT with 11HW12.5, 12HW14.6, 13HW31.8 and Optima CT660 with 12HW28.8, there is a possibility to have streak artifact on monitoring phase images of the SmartPrep in case of DAS count/signal is low.

This procedure describes how to set up low signal correction for the SmartPrep monitoring phase images.

Figure 1. A Sample Image

1 For LightSpeed VCT with 11HW12.5 and 12HW14.6

Application software should be in shutdown.

Procedure

  1. Open a Unix shell, and type the following.
    1. cd/usr/g/config ENTER
    2. cp prep_flags.cfg.vct prep_flags.cfg.vct.org ENTER
    3. chmod +w prep_flags.cfg.vct ENTER
    4. nedit prep_flags.cfg.vct ENTER
  2. Change the value of the following line to 1.

    (das_underange_corr_on=0 → das_underange_corr_on=1)

    Figure 2. nedit Window

  3. Click File, and click SAVE, then select Exit to close the window.

2 For LightSpeed VCT with 13HW31.8 and Optima CT660 with 12HW28.8

Application software should be in shutdown.

note:

In case of Optima CT660 with 12Hw28.8, the file name is prep_flags.cfg.cj64.

Procedure

  1. Open a Unix shell, and type the following.
    1. cd/usr/g/config ENTER
    2. cp prep_flags.cfg.vct prep_flags.cfg.org ENTER
    3. chmod +w prep_flags.cfg.vct ENTER
    4. xedit prep_flags.cfg.vct ENTER
  2. Change the value of the following line to 1.

    (das_underange_corr_on=0 → das_underange_corr_on=1)

    Figure 3. xedit Window

  3. Click SAVE, and select Quit to close the window.

3 Finalization

No finalization steps.