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RFM The X-ray Tube in Focus The RFM is a tool for determining the X-ray tube focal spot in a quick and easy way. No film is needed and the method is simple to apply.
Details
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Contact
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© Copyright 2012 RTI Electronics AB – RFM 201202
US Office
World Headquarters RTI Electronics AB
Phone: + 46 31 746 36 00
RTI Electronics, Inc.
Phone: 1-800-222-7537
Flöjelbergsgatan 8 C
Fax: + 46 31 27 05 73
33 Jacksonville Road, Bldg. 1
Fax: 1-973-439-0248
SE-431 37 Mölndal
E-mail:
[email protected]
Towaco, NJ 07082
E-mail:
[email protected]
USA
www.rtielectronics.com
SWEDEN www.rti.se
Measuring Method
The RFM is based on the slit method according to the IEC 60336 recommendation. The 10 µm wide slit makes it possible to measure focal spot sizes down to 0.10 mm, according to IEC 60336. The RFM can be automatically aligned. With a specially designed alignment pattern, and four CCD arrays, the RFM determines its position in the beam. It also calculates the enlargement factor and the distance from the focal spot to the detector.
Accessories
Two main accessories are available. The R100 Trig detector to start and stop measurements automatically, and the RFM pro holder (used by world leading X-ray tube manufacturers). It expands the use of the RFM when a higher degree of accuracy and repedibility of the positioning is required for example when doing absolute measurements in an X-ray tube production line.
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The RFM (Real-time FocusMeter) is a tool for determining the X-ray tube focal spot in a quick and easy way. No film is needed and the method is simple to apply. The greatest advantage of using this technique is the speed - in less than one minute a complete examination is carried out which gives you both the size and shape for different generator settings. The result of a measurement is available ”at once” and can be examined and displayed on a computer screen and the method makes it possible to measure, for instance, the focal spot width and length for different angles from the radiation beam axis. With this method it is also possible to measure focal spot down to 100 µm.
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Specifications General Supporting standards Tube focal spot types Exposure time kV range Charge range, tube Enlargement factor Measurement range Resolution MTF magn. factor Measured values Alignment system
IEC 60336 and NEMA XR5 Radiographic, CT, Mammographic, and Dental minimum 10 ms 22–150 kV 10–100 mAs (at 70 cm) 0.8–5 (automatically calculated) 0.1–5 mm 25/E µm (E = enlargement factor) 1 < M < 10 focus IEC 336 (or DIN or NEMA )focus RTI (length and width) MTF at -3 dB, M=2 RMS (Root Mean Square) Automatic
Trigger system Trigger modes Delay Window
Automatic (with external trig detector), Auto start, adjustable delay & window. Manual start, adjustable window 0–50 000 ms 10–50 000 ms
Specifications in this folder may be changed without notice.
