News
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Public Holiday and Changed Opening Hours
16 May 12 Between 17–18 May RTI Headquarter is closed.
RTI Inc is open as usual. -
New Software Release – 2012.05A
11 May 12 Piranha and Barracuda Latest Update
Released: May 11, 2012
Ocean: 2012.05.09.82
QABrowser: 4.2B
oRTIgo: 6.5A
CT Dose Profile Analyzer: 4.1A
Firmware: 2012.2A -
One Shot HVL for Mammography
07 May 12 One shot HVL for mammography is now available to all new Piranhas of version 2 or higher.
One shot HVL is possible both if you are using Ocean or QA Browser, with or without compression paddle.
All Piranhas (version 2 or higher), which are in for re-calibration, will get the one shot HVL feature. -
Time for Calibration - Schedule Yours Now
06 May 12 Please take five minutes to schedule your coming calibration with the RTI Service department.
RFM
The X-ray tube in focus
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.
Methods and Automatic Alignment
The RFM is based on the slit method according to the IEC 336 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.
Main features
- Fast and accurate
- Automatic alignment
- Focal spot size
- Shape (Line Spread Function)
- Modulation Transfer Function, MTF
- Root Mean Square (RMS) calculations
- Microsoft Access based database for saving data
- Export function for LSF data
- Only one exposure per axis
- High sensitivity
- Mammo focal spot sizes down to 0.1 (IEC 60336)
- No film needed
- Real-time measurements
- Windows software
| Supporting standards: | IEC 60336 |
| DIN 6823 | |
| NEMA XR5 | |
| Tube focal spot types: | Radiographic |
| CT | |
| Mammographic | |
| Dental | |
| Exposure time: | minimum 10 ms |
| kV range: | 22-150 kV |
| Charge range, tube: | 10-100 mAs (at 70 cm) |
| Enlargement factor: | 0.8-5 (automatically calculated) |
| Measurement range: | 0.1-5mm |
| Resolution: | 25/E µm (E=enlargement calculated) |
| MTF magn. Factor: | 1 < M =< 10 |
| Measured values: | focus IEC or DIN or NEMA |
| focus RTI (length and width) | |
| MTF at -3 dB, M=2 | |
| RMS (Root Mean Square) | |
| Zoom mode with user controlled cursors for measurements on LFS and MTF graphs. | |
| Alignment system: | Automatic |
| Trigger modes | Automatic (with external trig detector) |
| Auto start, adjustable delay & window | |
| Manual start, adjustable window | |
| Delay | 0-50 000 ms |
| Window | 10-50 000 ms |
Article Nr (RFM): 9707001-00
Accessories
R100 Trig detector To start and stop measurements automatically.
RFM Holder pro Holder for the Real-time FocusMeter.
The RFM Pro consists of a modified Real-time FocusMeter (RFM) and the RFM Holder Pro. In the RFM Pro the motors for xy-movement are removed. That makes the positioning of the detector more accurate according to the tube housing. The RFM Pro is intended for use with the RFM always mounted in the holder. The RFM Holder Pro is used by world leading X-ray tube manufacturers. It expands the use of the RFM when a higher degree of accuracy and repeatability of the positioning is required for example when doing absolute measurements in an X-ray tube production line.
Article NR (RFM Pro): 9707011-00