H and Q Series Image Intensifiers
Improved construction techniques produce higher quality images.

Input Window
Although a variety of materials have been used as Intensifier input windows, an Aluminum alloy has proved to be the best for X-ray transmission, high strength, and lowest scatter. the .7mm window provides a transmission characteristic of up to 95%. Its convex shape brings the input screen close to the entrance plane, maximizing useful field size.

Input Phosphor Screen
The current generation Hi-Res input screen greatly increases X-ray absorption, producing significantly higher Quantum Detection Efficiency (QDE) and Conversion Factor. Improved evaporation techniques of the needle-like layer allow for a more efficient, thicker (>400 micron) CsI scintillation screen with low crystal cross-talk. The 5 micron diameter needles are formed with specialized evaporation conditions and heat treatments, determining the density and final electro-optical characteristics of the scintillator.

The resulting image contains, simultaneously, lower noise and more brightness than previous generations, due to these improved phosphor depositing technologies.

Electron Optics
The accurate electron optic path assures that the electrons emitted by the curved photocathode focus on the flat output screen with minimal distortion or loss of resolution. The 30-35kV cathode-to-anode acceleration voltage provides noise-free brightness gain.

Output Phosphor Screen

Another distinguishing characteristic of the H Series construction is the Ultra-Compact output phosphor. The improved P20 type screen contains more homogeneous particles, between 1 to 2 microns in a 4-8 micron thickness. This produces lower fixed pattern noise and further enhances resolution.

Output Window
In the HP Series, the use of a Single-Glass output window eliminates the small detail contrast degradation of double-glass windows. An anti reflective coating and darkened stray light absorptive glass contribute to contrast improvement.

Further, in the HX Series, a Thick-Glass output window has the advantages of nearly 100% light transmission and superior small detail contrast. The window, with a coated periphery that completely absorbs reflected light, is entirely free of veiling glare. Significant improvements are achieved in large area and small detail Contrast Ratios.

New For 2000
The latest development Q Series image tubes will produce yet higher resolution, contrast and lower noise for digital acquisition, without compromising the already outstanding conversion factor and QDE. See Tube Specs for more information.

Summary
Image Systems with Precise Optics H and Q Series Image Intensifiers will provide higher contrast, lower noise, more brightness, and better resolution. These increased characteristics deliver optimum performance for critical cardio and vascular angiography, as well as the latest digital fluoroscopy acquisition techniques.

Housing

• Magnetic Shielding: Shielding is an effective mu metal alloy that protects the tube from magnetic fields, either naturally or electrically created.
• Radiation Shielding: Protection is provided up to 150kVp and satisfies all D.H.H.S. Regulations.
• Mechanical Support: Tube housings are made from a strong, lightweight aluminum alloy. The housing can be free standing, supported either by a circular bolt pattern around the input phosphor, or by a mounting tab along the side of the system. Custom mounting configurations are available.

Power Supply
All systems use compact solid-state power supplies operating in the range of 30-35kV, mounted either internally or on the housing body. Input power is 115/220V, 24Vdc, 40Vdc, 50/60Hz AC, as required. Power supply focus and acceleration voltages are preadjusted at the factory for simplified installation.