kV / MV Isocenter Coincidence Tests

Description

Using RIT software and CIRS ISO Cube phantom will help test the following parameters of Varian kV (OBI) and MV (EPID):

kV (OBI) to MV (EPID) ISO Cube Center Offset

kV Vertical and Longitude Offset

kV and MV SID

MV Longitude and Lateral Offset

CBCT Longitude, Verticl and Lateral Offset

CBCT Isocenter Offset

kV Collimation (Radiation to Light Field Coincidence)

Spatial Resolution and MTF

MV Collimation (Radiation to Light Field Coincidence)

Supports:

All Varian EPID and OBI

All TG-142 recommended kV Imaging tests

In addition, it provides automated tracking, trending and reporting.

Description

Using Modus Penta-Guide phantom and Penta-Guide QA software will test the following parameters of Elekta kV (XVI) and MV (EPID):

kV (XVI) to MV (EPID) Penta-Guide phantom center X and Y location offset

X and Y field sizes

Scale error

Phantom rotation degree

Using the same phantom and software, it also tests CBCT image quality:

Image sizes, Vozel sizes and Center sphere sizes for X, Y and Z locations

Pitch, Roll and Yaw

Geometric Scale errors

Non-Uniformity

Contrast to Noise Ratio

Mean Acrylic CT Number with SD

Mean Air CT Number with SD

MTF (50%) in lp/mm

Non-Colinearity in mm

Error Phi in degree

Supports:

All Elekta EPID and XVI

All TG-142 recommended kV Imaging tests

In addition, for Penta-Guide Enterprise users, it provides automated tracking, trending and reporting.