NOMEX^® Multimeter

Intuitive, Time-Saving kV Imaging QA Solution

ALL-IN-ONE

Capture all relevant beam parameters in one single exposure ̶ Easy to upgrade at any time

INDEPENDENT

Rotation-independent positioning in the central beam - no further alignment needed

USER-FRIENDLY

Intuitive software, including one-click export of data and waveform charts to MS Excel^® templates

RELIABLE

Always know about the quality of your measuring results with transparent and sophisticated warning management

NOMEX Multimeter Interactive

Modular, Easy-to-Upgrade Solution for Absolute Dosimetry and Quality Control in Diagnostic Imaging

RAD · FLU · MAM · DENT · CT · IGRT

RAD/FLU, DENT, MAM, CT, IGRT

Fully automated miniaturized medical device that is class IIb compliant with IEC 61674 (passed the Type Approval Under German Law by the German National Metrology Institute, PTB) - all relevant ranges set up automatically.

Simultaneous acquisition of all relevant parameters

The single exposure captures a number of data points including dose, dose rate, dose per pulse, pulses, frequency, exposure time, tube voltage (kVpmax, kVpmean and PPV according to the IEC 61676 algorithm), total filtration and half-value layer. The data is presented alongside waveforms for both kV and dose rate, with the option to include mAs (either invasive or non-invasive).

Exceeding IEC standard requirements

Dose accuracy within the RAD/FLU range typically ± 1.5%, within the MAM range ± 2.5% and kV accuracy within the RAD/FLU range typically ± 0.75% or ± 0.5 kV

All-in-One

Our miniaturized multimeter is suitable for use in RAD/FLU, DENT, CT, MAM, and IGRT. This versatile device allows for precise measurement of all parameters, streamlining the process and ensuring accuracy.

(Available qualities: Mo/30μmMo, Mo/25μmRh, Mo/0.25mmCu, W/0.7mmAl, W/50μmRh, W/50μmAg, W/0.3mmCu Rh/25μmRh, Rh/0.03mmAg, Rh/0.25mmCu, W/1.1mmTi)

NOMEX Fully Automatic - Quick to Set Up

Setup: Connect directly to PC or tablet, position device (independent of orientation) and evaluate results (in Excel or Track-it)
Auto dose ranging: Dose ranges are set fully automatically, so that troublesome and time-consuming double exposures can be avoided
Auto kV ranging: kV ranges are set fully automatically. There is no need to adjust the meter to the correct kV range before the measurement
Auto total filtration compensation: Within the RAD/FLU/DENT/CT range, the adjustment of the X-ray tube filtration is not necessary based on the implemented total filtration compensation up to 55 mm aluminum
Auto HVL detection: For all applications including all MAM radiation qualities

NOMEX Intuitive Software

Modifiable parameter display (view all parameters at a glance or just selected ones)
Statistic calculations (mean value, standard deviation, coefficient of variation) by simply marking the results of interest
Adjustable timer functions (start or stop delays) and waveform sampling
Data and waveform export directly to MS Excel (templates) or to Track-it
Software menu available in different languages (German, English, French, Spanish, Portuguese, Italian, Russian, Chinese, Japanese)

Technical Specifications

Type of product:	Non-invasive measuring device for reference dosimetry and quality control measurements in diagnostics
Standards:	61674, 61010-1, 61326-1, PTB type approval
Application:	RAD, FLU, DENT, DENT-PAN, CT, MAM
Measuring quantities:	Air kerma (Gy), air kerma rate (Gy/s), exposure (R), exposure rate (R/s), dose per pulse (Gy, R), pulses, frequency (Hz), exposure time (s), tube voltage (kVpmax, kVpmean, PPV), half value layer, total filtration (mm Al), kV and dose rate waveform optionally: current (mA) and current-time-product (mAs)

Air kerma rate R/F Sensitivity Mode	5 µGy/s ... 500 mGy/s, ± 3.5 % (typically ± 1.5 %) 0.1 µGy/s ... 500 mGy/s (typically ± 5 %)
Trigger level	min. 10nGy/s (typically)
Air kerma R/F	50 nGy ... 500 Gy, ± 3.5 % (typically ± 1.5 %)
kV R/F	(50 ... 150) kV, ± 1.5 % or ± 1 kV (typically ± 0.75 % or ± 0.5 kV)
Total filtration	(1.5 ... 40) mm Al, ± 10 % or ± 0.5 mm Al
HVL R/F	(0.95 ... 13.5) mm Al, ± 0.25 mm Al or ± 10 % (typically ± 0.1 mm Al)
Air kerma rate MAM*	50 µGy/s ... 500 mGy/s, ± 2.5 %
Air kerma MAM*	0.5 µGy ... 500 Gy, ± 2.5 %
kV MAM*	(23 ... 35) kV, ± 0.5 kV
HVL MAM*	(0.25 ... 0.75) mm Al, ± 0.01 mm Al
Dose per pulse	50 nGy ... 500 Gy, ± 3.5 % (typically ± 1.5 %)
Pulses	0 ... 99999
Frequency	(0.2 ... 500) Hz
Irradiation time	1 ms ... 298 h, ± 1 % or ± 0.5 ms
Dimensions (HxWxD):	115 mm x 50 mm x 9 mm
Weight:	250 g

* Refers to all incl. qualities: Mo/30μmMo, Mo/25μmRh, Mo/0.25mmCu, W/0.7mmAl, W/50μmRh, W/50μmAg, W/0.3mmCu Rh/25μmRh, Rh/0.03mmAg, Rh/0.25mmCu, W/1.1mmTi (each with and without compression paddle correction)

**Depending on the radiation quality

L981815 NOMEX Multimeter all-in R/F/MAM/DENT/CT

L981533 NOMEX Multimeter all-in R/F/MAM/DENT/CT with mAs option

L981606 NOMEX Multimeter R/F/MAM

L981610 NOMEX Multimeter R/F/MAM with mAs option

L981611 NOMEX Multimeter R/F

L981612 NOMEX Multimeter R/F with mAs option

L981613 NOMEX Multimeter MAM

L981614 NOMEX Multimeter MAM with mAs option

L981617 NOMEX Multimeter CT

L981618 NOMEX Multimeter CT with mAs option

L981599 NOMEX Multimeter IGRT

L981600 NOMEX Multimeter IGRT with mAs option

E41700B/S/G Service contract Bronze, Silver or Gold

L981530 NOMEX mAs

L981529 Current clamp for NOMEX mAs

Mobile PC

NOMEX® Multimeter holder for usage for dental units or in combination with a tripod

NOMEX® Multimeter cassette adapter (dimensions 18 cm x 24 cm)

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NOMEX Multimeter R/F/MAM simple connection

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Positioning the NOMEX Multimeter

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NOMEX Multimeter positioning

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NOMEX Multimeter software

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NOMEX Multimeter - acquisition of all data in one exposure

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NOMEX Multimeter MAM setup

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NOMEX Multimeter MAM software

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NOMEX Multimeter MAM application (easy to use)

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NOMEX Multimeter with mAs option

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Current clamp for Nomex mAs

FAQ

Yes. According to the European Medical Device Directive (MDD), an accessory for X-ray equipment is also a medical device.
The users take care of their legal responsibilities and progressively check the certification status of medical device accessories.

Some devices show outliers for dose measurements exceeding ± 5%, especially at the end of the measuring ranges.
According to IEC 61674, the relative uncertainty for air kerma measurements shall not exceed ± 5% within the complete measuring ranges from (23 ... 35) kV and (40 ... 150) kV.
NOMEX fulfils and even exceeds this requirement: RAD/FLU typically ± 1.5 % and MAM ± 2.5 %

PTW recommends recalibrating the NOMEX every 2 years. PTW devices are famous for their reliability, accuracy and outstanding long-term stability.

Requiring a recalibration every year would indicate bad long-term stability. The energy response (sensitivity) of the device changes, with the result that the calibration factors are no longer valid, meaning the measuring results are unreliable. Moreover, an annual recalibration is a considerable cost factor.

The NOMEX multimeter is calibrated for the use in RAD/FLU/DENT/CT and MAM range according to the radiation qualities given by the IEC 61267.
The factory calibration comprises the calibration of air kerma, air kerma rate (tractable to the PTB), tube voltage (for most precise results: measured by means of a high voltage divider), time, total filtration and half value layer.

Some devices require multiple shots before the real measurement can be performed. These pre-measurements reveal the device's shortcomings in regard to auto ranging.
Due to the implemented fully automatic ranging, multiple exposures are not required in order to find the correct dose and/or kV range when using the NOMEX.

The TF compensation facilitates the performance of kV measurements without adjusting the device to the existing tube filtration (mm Al).
The device identifies the filtration and corrects the kV measurement result accordingly. NOMEX measures the TF within the completely specified measuring range (40 kV ... 150 kV) without exception.

In contrast to other devices which only allow a kVp detection for a subset of selected radiation qualities, the NOMEX multimeter offers kVpmax, kVpmean and PPV measurements within the complete specified energy range (23 ... 35) kV and (40 ... 150) kV without exception.
NOMEX provides the kV parameters not only for Mo/30µmMo, but also as standard for all mammography qualities: Mo/25µmRh, Mo/0.5mmAl, W/0.7mmAl, W/60µmRh, W/60µmAg and Rh/30µmRh.

Yes, NOMEX calculates the practical peak voltage (PPV) according to the algorithm described in IEC 61676.

NOMEX detects the HVL for all applications including all common mammography radiation qualities: Mo/30µmMo, Mo/25µmRh, Mo/0.5mmAl, W/0.7mmAl, W/60µmRh, W/60µmAg and Rh/30µmRh.

Yes, in mammography the NOMEX comes calibrated and ready to be used for all common radiation qualities such as Mo/30µmMo, Mo/25µmRh, Mo/0.5mmAl, W/0.7mmAl, W/60µmRh, W/60µmAg and Rh/30µmRh.
Moreover, a compression paddle correction factor is provided for each quality.

The NOMEX multimeter fits with 115 mm x 50 mm x 9 mm within the cassette plane. Optionally, a cassette adapter is available for more convenient use within the image receiver plane.

The NOMEX multimeter can be positioned in RAD/FLU/DENT and MAM within the central beam independently of the tube axis orientation.
Time-consuming alignments according to the tube axis are unnecessary.

Some devices are indicating a measuring result even if it is absolutely wrong. It is then up to the user to decide whether the result is reliable, slightly inaccurate or completely wrong.
PTW knows about its responsibility! Therefore the NOMEX multimeter has a sophisticated error management system, which informs the user about the quality of the measuring result!
NOMEX indicates if a measurement was inaccurate. Additionally NOMEX suggests what to change within the software settings or within the measurement setup in case of a measuring problem.
The user always knows about the measurement quality and always knows what to do.

NOMEX is equipped with modern boot loader technology. Downloading the latest firmware version via internet or CD within seconds reduces unnecessary delivery costs and unavailability due to long delivery and redelivery periods.

In order to offer maximum flexibility, the NOMEX software can be installed an unlimited number of times.

NOMEX is tested with Windows operating systems. Running for example XP, Vista or WIN7 on a virtual machine, NOMEX can be used on an Apple device.

A 5 m long USB extension cable [L178088] is available and an extension up to 22 m is possible.