Real-Time Tracking Software, Prostate Motion, Kilovoltage Intrafraction Images.

Kilovoltage Intrafraction Monitoring (KIM) is a novel method of localizing tumours during treatment. The KIM software takes 2D x-ray images with fiducial markers acquired during treatment and determines the 3D positions of those markers in real-time. Depending on a preset threshold (e.g. 3mm/5s), it is decided whether or not to switch off the treatment beam and perform a couch shift.

KIM Gating Software Installer

Please download the KIM Gating installer.

Download Here.

If a login is required, please use:
login: or
password: kimgating3/5


Running KIM Gating

After installing KIM Gating to an appropriate folder (e.g. KIM Gating), follow these instructions to run the software.

  1. Double-click RNSHProstateUI.exe in the KIM Gating folder and you will see the KIM Gating software settings screen (pictured below) 


A detailed description of each parameter is provided here:

Setting Parameter Description
Source Folder Process images offline in specified Directory
iTools Currently not implemented
Watch Folder Process images live as the images are being copied onto the selected Directory
Frames to average n Rolling average of n number of frames
Discard accumulated frames Ticked Process latest image that is copied into Directory
Unticked Process all copied images into Directory in sequence
Directory Directory path Folder in which images will be processed. Trajectory files will also be output here
Field of view
X (mm) Number in mm Width of field size in mm
Y (mm) Number in mm Height of field size in mm
Warning at (mm) Number in mm 3D position threshold above which the status changes to “Warning”
Stop after (sec) Number in sec Time after 3D position exceeds “Warning at” where status changes from “Warning” to “Pause”
Pause at (mm) Number in mm 3D position threshold above which status changes to “Pause” immediately
Marker Analysis
Pretx Arc (deg) Number in deg Length of pretreatment arc in degrees
Invert Image Ticked Invert pixel value of image
Unticked Do not invert pixel value of image


  • Select the Source i.e. the operating mode.
  • Select the directory of the images you would like to process.
  • Input the required field size in mm.
  • Input the appropriate thresholds. For our prostate data we use 3mm/5s as an example.
  • Input the required pretreatment arc length in degrees.
  • Depending on whether the images are inverted or not, tick or untick the inverted checkbox so that markers appear light on a dark background in the following screen.
  • Click on Continue to run the software. The following screen should pop up:
  • The trajectory file “MarkerLocations_CouchShift_0.txt” will be output the the directory selected in Source.


Prostate Trajectories

In 2011, 30 prostate cancer patients underwent conventionally fractionated Intensity Modulated Radiotherapy at the Royal North Shore Hospital. kV images were acquired during treatment. The data were analysed post treatment to determine how much the prostate moved during treatment. No treatment intervention was performed during treatment.

The prostate trajectory data obtained has been published in the Red Journal

Figure 3 shows a variety of prostate trajectories observed in that clinical study.

Figure 3. Varieties of prostate trajectories observed during IMAT treatment with KIM.

Raw Images and Trajectory Data

Trajectory Data
Raw Images
Stable Trajectory
Download Here.
Download Here.
Continuous Drift
Download Here.
Download Here.
Transient Excursions
Download Here.
Download Here.
Persistent Excursions
Download Here.
Download Here.
High-frequency Excursions .
Download Here.
Download Here.
Erratic Behaviour
Download Here.
Download Here.


If a login is required, please use:
login: or
password: kimgating3/5



For technical inquiries regarding the software please contact or