AutoPIA

by | Nov 3, 2016 | Leeds Software

AutoPIA (Automatic Phantom Image Analysis) is a software for automatic recognition and analysis of test images of objects (phantoms) used to evaluate image quality. AutoPIA is able to quickly provide reproducible and objective quality indices for routine quality control processes aimed at optimizing the performance of an X-ray system.

AutoPIA automatically analyses a given digital image and quickly calculates objective, reliable, and reproducible indices to evaluate the performance of a radiological equipment. Then it stores the analysis results and provides control charts with baseline and threshold values in order to keep track of quality trends and abnormal conditions.

AutoPIA is currently able to recognize and analyze the following phantoms:

A 20 day demo licence for AutoPIA can be downloaded from the AutoPIA downloads page.

TO CTDI plus

by | Nov 3, 2016 | Leeds CT

TO CTDI plus permits the user to measure the dose index for computed tomography systems. The test object consists of three PMMA cylinders, one cylinder represents the paediatric head (100mm diameter), the second the adult head (160mm diameter) and the other represents the body (320mm diameter). The length of each cylinder is 140mm. Each cylinder contains holes large enough to accept a radiation detector, used to take the dose measurements.

There is a hole at the centre of the cylinders and one at each 90° interval, centred 10mm from the edge of the cylinder. This item is available as a nested phantom (the paediatric head phantom fits inside the adult head phantom which fits inside the body phantom).

TO CTDI plus enables the following tests to be made:

  • CTDI100 (centre)
  • CTDI100 (peripheral)
  • CTDIw (weighted CTDI100)
  • CTDIvol (weighted CTDIw)
  • CTDIfree air

TO CTDI plus is heavy and as such is provided in a tough case with wheels and telescopic handle.

Please note: a CTDI holder is now available for suspension of the TO CTDI plus over the couch end.

CBCT-161

by | Nov 3, 2016 | Leeds Dental

CBCT-161 phantom is used for constancy testing of CBCT systems.

CBCT-161 comprises:

  • PMMA cylinder with;160 mm diameter, 40 mm length
  • Spirit level and pigment-filled centre markings for easy and reproducible positioning
  • Tripod for universal positioning
  • Soft tissue equivalent; PMMA
  • Bone equivalent; PVC- density 1.30 – 1.45 g/cm
  • Air gap

CBCT-161 permits measurement of the following image quality parameters:

  • Pixel Intensity Value Linearity
  • Noise
  • CNR
  • Homogeneity
  • Artefacts
  • MTF

 

CBCT-161-A phantom is an accessory to CBCT-161 and is used for acceptance testing of CBCT systems.

CBCT-161-A comprises:

  • PMMA cylinder with;160 mm diameter, 60 mm length
  • PMMA cylinder with;160 mm diameter, 50 mm length, with threaded hole for attachment to a tripod

TOR CDR

by | Nov 3, 2016 | Leeds CR-DR

TOR CDR radiography phantom is a routine test object designed to be used quickly and easily on a regular basis (e.g. weekly or monthly) to provide an ongoing check of imaging performance, particularly those aspects which are most liable to deterioration. After an initial grey-scale check, image quality is measured simply by counting the number of details detected and the number of bar-patterns resolved in the image. An ongoing record of these numbers will reveal any trend towards deterioration in imaging performance.

Used for conventional and non-subtractive digital radiography, and fluorography, enables the following checks to be made:

  • Sensitometric measurements (10 test point details, 5.6mm diameter)
  • Resolution limit (0.5 to 14.3 LP/mm)
  • Low-contrast large-detail detectability (17 details, 11mm diameter)
  • High-contrast small-detail detectability (17 details, 0.5mm diameter)

In addition to checking the consistency of radiographic performance, the test object can be used to assess the relative performance of different screen-film combinations.

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