Dose Area Product Measuring System VacuDAP

VacuDAP systems - patient safety by Dose Area Product monitoring

The European Guideline 97/43/EURATOM requires the determination of the patient dose in X-ray applications especially with children and when using higher doses. The VacuDAP system for automatic measuring of the dose area product complies fully with this requirement. (IEC 60580)

The modular VacuDAP dose area product measuring system offers various ionization chambers and configurations for a wide range of X-ray equipment. The VacuDAP measuring system is used to measure the Dose Area Product (DAP). This value is most suitable to indicate the patient dose in X-ray diagnostics.

The transparent ionization chambers fit easily into the accessory rails at the collimator. Adapted circular ionization chambers are used for complete integration into C-arm machines. All devices are equipped with a serial interface for transfer data files to a printer or a PC. Different printer, adaptor and PC software is available as an accessory.

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Air Kerma- / Dosisflächenprodukt Messystem - VacuDAP duo

VacuDAP systems - patient safety by Dose Area Product and Air kerma monitoring

The system VacuDAP duo allows to determine Dose Area Product, Dose Area Product Rate, Air Kerma, Air Kerma Rate and irradiation time.

So the system fully complies with international regulations for Patient Dosimetry in radiography and fluoroscopy systems (IEC 60601-2-54, IEC 60601-2-43, 21 CFR 1020.32, IEC 60580).

 

Medical

AEC chamber

The Ionisation Chambers are used as sensor elements for automatic X-ray exposure control units. They comprise air-filled parallel chambers with 1 or 3 measuring fields, coupled with an amplifier and a field selector. The low overall thickness of 6 mm ensures the chamber may be used with all modern X-ray equipment.

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Principle of Operation

The current generated in the sensor fields by the X-rays will be amplified, digitized and fed to the automatic exposure controller. The AEC supplies the cut-off signal to the generator, and thereby ensures an optimal and reproducible image quality, independent of the radiation quality, object density, and other factors.

Chamber Electronics

The ionization chambers are supplied with a minimized chamber electronics, that amplify, digitize and process the generated current according to the field selection. The electronics also generate the chamber voltage without the need for an external high-voltage source.

Ramp Module

In order to assure the backward compatibility with conventional interfaces a separate ramp module converts the pulses into a voltage ramp. This ramp module should be placed between interface cable and AEC interface on the generator site.