Fluoro-Test™ Resolution Tool

The Fluoro-Test Resolution Tool is a fluoroscopic contrast resolution device that employs a target arrangement designed to reduce ambiguity and difficulty associated with employing a sequential array of targets with small differences in contrast between adjacent targets. It is designed to yield a quantitative assessment of fluoroscopic threshold contrast.

With the Fluoro-Test target plates, the user focuses on a subset of three targets at a given time. In each subset or column, large differences (approx. 3%) are present between adjacent targets and it is easy to decide if a target is visualized or not. The threshold contrast for a plate is the lowest of the values observed for the three columns of targets, and a contrast resolution precision of 0.5% is obtained by the sequential use of the two plates. When imaged at 80 kVp with 2.0 mm of Cu beam attenuation, the targets of Plate A range in contrast from 1 to 8% in 1% increments. Likewise, the targets of Plate B range from 0.5% to 7.5%. Tables of target contrast versus kVp permit the user to determine target contrast (and therefore threshold contrast resolution) at other fluoroscopic tube potentials.

07-645 Fluoro-Test Resolution Tool

Fluoro-Test Resolution Tool

SPECIFICATIONS
The test tool consists of two 6 x 6 x 0.25 in (6.1 mm) thick aluminum plates, with each plate containing an array of 1.1 cm targets of varying contrast. Also included are three 6 in x 6 in x 1 mm thick copper attenuator sheets. Weight: 3.15 lb (1.42 kg)

* Manufactured under licensing agreement with UAB Research Foundation, University of Alabama at Birmingham, Alabama.

The development of the Fluoro-Test Tool is based on the work of Wagner, Barnes and Wu. A.J. Wagner, G.T. Barnes and X. Wu, “Assessing Fluoroscopic Contrast Resolution: A Practical and Quantitative Test Tool, “ Medical Physics, 18 (1991), 894-899.