Harpell Associates - Radiation Oncology, Medical Physics, Diagnostic Imaging, Nuclear Medicine, PET, Radiology, Ultrasound, Radiation Safety

Extremely Intelligent QA Device

The Unfors Xi is a new generation, multi-function, intelligent X-ray meter. Unfors is renowned for its pocket-sized and easy-to-use meters that improve productivity. Now the Unfors Xi adds even more user friendliness with Active Compensation for all beam qualities.

60 seconds

You have five minutes to find the problem. What are your expectations of your QA device?

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Active Compensation of kVp

No correction is needed for varying total filtration. Watch the video.

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Unifors Xi Features:

Active Compensation Active Compensation is a new proprietary feature of the Unfors Xi. Utilizing multiple sensors and advanced calculations, the beam quality is automatically determined thereby eliminating the need for further corrections of measured kVp and dose values. This built-in intelligence enhances ease-of-use.

“All-In-One” “All-In-One” is a perfect descriptor for the Unfors Xi since one detector can simultaneously measure kVp, dose, dose rate, pulses, pulse rate, dose/pulse, time and waveforms for all modalities. Three versions of Xi Detectors are available: R/F + Mammo, R/F only and Mammo only.

Pulsed fluoroscopy Pulsed fluoroscopy is used more in today’s radiology departments than ever before. The Unfors Xi makes it very easy to measure any type of pulsed fluoroscopy since automatic features detect and calculate the pulse rate and dose/pulse. No user interaction is needed. Unfors Xi - Extremely Intelligent.

Improve productivity “The need for a compact and easy-to-use design was an obvious conclusion drawn from our many conversations with field service engineers, medical physicists and government inspectors. Our engineers have focused on minimizing the size of the Unfors Xi while maximizing its performance. We provide you with a small and lightweight, yet powerful QA device which requires minimal training and is easy to use. We help you improve productivity.” Tomas Unfors, Founder


A complete solution The Unfors Xi is a complete QA system and can be fully upgraded as new features are introduced. The basic Unfors Xi configuration consists of two primary components: the Xi Base Unit and the Xi Detector. The Xi Detector is connected to the Base Unit with a detachable 2 or 10 meter cable. The Unfors Xi setup time is remarkably short. Acquiring the first measurement takes less than a minute.

The Unfors Xi Base Unit The three row alphanumerical display clearly presents all measured parameters. All functions are accessed by pressing one of the Unfors Xi’s two buttons. The Unfors Xi operates on a rechargeable 9V battery. The Unfors Xi supports both RS-232 and the optional Bluetooth data communications protocols. The new Xi View software is used to record measured data, waveforms and test results in Excel™.

	The Unfors Xi Detector Dose measurements with the Unfors Xi are extremely accurate thanks to the Active Compensation feature. Traditional bulky and fragile ion chambers can now be substituted with small solid state detectors to achieve accurate measurements. Standards in dose measurements are evolving. Evolve instantly with a meter that uses tomorrow’s technology. The kV sensors of the Unfors Xi are extremely sensitive and capable of measuring on any X-ray machine over the full range of the machine’s kVp and mA settings. Added filtration is not a problem for the Unfors Xi since Active Compensation automatically corrects for it.

Three versions of interchangable Unfors Xi Detectors are available: R/F + Mammo, R/F only and Mammo only. The Unfors Xi Mammo detector handles the seven most common beam qualities used in today's mammographic X-ray machines.

Unfors Xi Base Unit includes:

International Power Supply
2 & 10 meter detector cables
2 meter serial cable
Unfors Xi Case
Unfors Xi View software
User’s Manual

Unfors Xi Options:

Unfors Xi Bluetooth serial adapter
Unfors Xi HVL stand & detector holder
Unfors Xi HVL kit
HVL filter sets

GENERAL
EMC tested	According to EN 61-000-4-2, EN 61-000-4-3 and EN 55011
Waveform	Single phase to high frequency and pulses with less than 2 s dead time interval.
Exposure needed	One
Power off	Automatic after 5, 20 or 60 min of inactivity
Reset	Automatic
Power source	Rechargeable NiMH standard 9V
Battery time	20 hours (11 h with Bluetooth)
Read out	Three row alphanumerical
Size Base unit	(HxWxL) 28 x 74 x 142 mm, (1.1 x 2.9 x 5.6 in)
Detector	(HxWxL) 12 x 22 x 117 mm, (0.5 x 0.9 x 4.6 in)
Weight Base unit	250 g, (8.75 oz)
Weight Detector	50 g, (1.75 oz)

kVp
Range R/F (auto)	35 - 160 kVp/kV
Range MAM (auto)	22 - 40 kVp/kV
Accuracy	± 2 %
Sensitivity R/F low	0.04 mA at 40 kV, 50 cm
Sensitivity R/F high	0.8 mA at 70 kV, 50 cm
Sensitivity MAM	10 mA at 28 kV, 65 cm

Dose
Range (auto)	10 nGy - 9999 Gy, (1 µR - 9999 R)
Accuracy R/F	± 5 % (40 - 150 kVp and for HVL = 1.5 - 14 mm Al*, Active Compensation)or ± 10 nGy (1 µR)
Accuracy MAM	±5 % (22 - 40 kVp and for HVL up to 2.5mm Al added filtration,Active Compensation)

Dose rate
Range R/F low (auto)	10 nGy/s - 1 mGy/s (70 µR/min - 7 R/min)
Range R/F high (auto)	20 µGy/s -1000 mGy/s (140 mR/min - 7000 R/min)at 70 kVp
Range MAM (auto)	10 µGy/s - 100 mGy/s (70 mR/min - 700 R/min)

Exposure time
Range (auto)	1.000 ms - 999.9 s
Accuracy	± 0.5 % or 0.2 ms
Pulse	(R/F only)
Range (auto)	1 - 9999 ± 1 pulses
Frame rate	(R/F only)
Range (auto)	0.5 - 120 pulses/s
Dose per frame	(R/F only)
Range (auto)	1 nGy (0.1µR)-9999 Gy(R)/pulse

HVL
Range R/F	1.00 - 14.0 mm Al
Range MAM	0.2 - 1.2 mm Al depending on beam quality
Accuracy R/F	± 10% or ± 0.2 mm Al (within 1 ‰ of max dose rate for selected sensor)
Accuracy MAM	± 5% (for HVL up to 2.5 mm Al added filtration to each beam quality)
Beam qualities	MAM Mo/Mo, Mo/Rh, Mo/Al, Rh/Rh, Rh/Al, W/Al and W/Rh



Manufacturers	Radiation Oncology	Medical Physics	Diagnostic Imaging	Radiation Safety	Exercise Systems

Discounted Nuclear Medicine Equipment