Features:

• DICOM Compatible.

• Graphical Result Screens

• Summary Report

• Database File Output Results

• Provides for Variations in Phantom Configurations and Physical Tests.

• System adaptable to the SpecPhan^(tm) Phantom^(tm).

• Monitors System Performance and Service Delivery.

• Helps Fulfill Regulatory Requirements.

Spatial Resolution-MTF:
The MTF is calculated from the discrete Fourier Transform of the average vertical and horizontal LSF's of the point spread function data from the point source mounted in either air or scatter. The program reports the 50%, 10% and cutoff MTF values and included the FWHM and FWTM measurements.

Slice Width:
This test determines the average FWHM of the ramp section count profile for the set of opposing ramps. A trigonometric conversion is calculated based on the known ramp angle to yield the volume thickness.

Uniformity:
Vertical and horizontal profiles are generated through the phantom's center. The fractional uniformity is calculated as the percentage of the profile pixels within an acceptable range determined by +/-10% of the central mean signal. The % integral uniformity is also calculated from the profile data.

Pixel Size Test:
The pixel size test is determined from the 4 "hot" plugs of known dimensions whereby the size of a pixel can be calculated for the x and y axis.

Noise and Mean Number:
The mean and standard deviation (noise) statistics are calculated for several ROI's positioned over the uniformity image section.

System Requirements:

The system requirements for the IRIS, Inc software packages are as follows:

Pentium Processor
3.5" HD Floppy Drive
DICOM Supported System:Network Interface
Windows 95 Required
Interfaces for Non-DICOM Systems Available