Brachytherapy Measurements

UNIDOS^®
		UNIDOS is a secondary standard and reference class dosemeter for universal use. UNIDOS displays the measured values of dose, dose rate, charge, and current in Gy, Sv, R, Gy/min, Sv/h, R/min, Gy·m, C or A. Ion chambers including a CT probe and solid state detectors can be used with UNIDOS. Air density corrections are performed by keying-in air pressure and temperature or by means of a radioactive check device.

The check device data are stored in a data base. UNIDOS includes automatic noise suppression and an automatic built-in system test.

Features:

Suitable for high precision dosimetry acceptance tests of X-ray equipment using ionization chambers
Features high accuracy, long-term stability, excellent resolution and wide dynamic measuring ranges
Complies with IEC 61674 and IEC 60601-1
Suitable as a reference class dosemeter according to IEC 60731 for radiation therapy and as an in-vivo dosemeter according to IEC 60601-2-9 for patient contact measurement
Includes an extensive detector library for storage of detector data and calibration factors

UNIDOS^webline
		UNIDOS is well known and accepted worldwide as the dosemeter of choice with the best performance available on the market. The new UNIDOS^webline sets another milestone in dosimetry. It is a high-precision, secondary standard reference class dosemeter combined with modern network features.

The Ethernet interface based on the TCP/IP protocol makes it possible to integrate the UNIDOS^webline in a LAN for remote access and e-mail capability. Its large, user configurable colour TFT display guarantees visibility from distances and from wide angles. Chamber data are stored in a comprehensive chamber
library. Air density is corrected by keying in air pressure and temperature or by means of radioactive check devices. The check device data are stored in a database. An internal clock calculates the isotope radioactivity decay. The unit features both mains and battery operation. The delivery includes a manual in English.

UNIDOS^® E
		The lightweight and compact field class dosemeter UNIDOS E is ideally suited for routine measurements in diagnostic radiology. It measures dose, dose rate, dose length product, charge and current. The displayed units are Gy, Gy/min, R, R/min, Gy·m, C and A. It can be used with a variety of ionization chambers and solid state detectors.

A CT probe can be connected to measure the dose length product in Gy·m for dosimetry in computed tomography. Air density corrections of the sensitive chamber volume are made by keying-in the air pressure and temperature.

Features:

Combines high quality with good value
Suitable for standard dosimetry in diagnostic radiology and radiation therapy
Features high accuracy and excellent resolution (1 fA)
Meets and exceeds the requirements for field-class dosemeters according to IEC 61674 and IEC 60731

DIADOS
		DIADOS is an all-round acceptance test device for measuring dose values and exposure time of different X-ray equipment using various accessories. The measurements of radiographic, fluoroscopic, mammographic and dental X-ray equipment are based on solid state detectors. The CT measurement is based on a CT ion chamber connected to a separate high voltage supply.

The calibration factors of the detectors are selectable for different X-ray filtration. The autostart feature for the dose, dose per pulse and exposure time measurement starts as soon as the DIADOS detects radiation. The measuring ranges in general feature wide dynamics. The automatic zeroing function is another very helpful feature. The DIADOS can be operated by the mains power supply or by rechargeable batteries. An RS232 interface for computer control is included.

Features:

Measures dose, dose rate, dose per pulse, pulses, dose length product and irradiation time
Ideal for measurements in the useful X-ray beam at the entrance and exit side of patient-equivalent phantoms
Includes electrometer modes for current and charge
Complies with IEC 61674

DIADOS E
		The DIADOS E is a valuable small size all-round acceptance test device for measuring dose values and exposure time of different X-ray equipment using various accessories. The measurements of radiographic, fluoroscopic, mammographic and dental X-ray equipment are based on solid state detectors. The CT measurement is based on a CT ion chamber connected to a separate high voltage supply.

The calibration factors of the detectors are selectable for different X-ray filtration. The auto-start feature for the dose and exposure time measurement starts as soon as the DIADOS E detects radiation. The measuring ranges in general feature wide dynamics. The automatic zeroing function is another helpful feature. The DIADOS E can be operated by the mains power supply or by rechargeable batteries.

Features:

Valuable small size dosemeter for service and acceptance tests
Measures dose, dose rate, dose per pulse, pulses, dose length product and irradiation time
Ideal for measurements in the useful X-ray beam at the entrance and exit side of patient-equivalent phantoms
Includes electrometer modes for current and charge
Complies with IEC 61674

MULTIDOS®
		The MULTIDOS multi channel dosemeter is designed for absolute dosimetry, in-vivo measurements and quality control in radiation therapy and can be used with ionization chambers and semi-conductor detectors. It meets or exceeds the standards for field class dosemeters as specified in IEC 60731. The calibra-tion factors are stored in the unit and additional correction factors can be entered.

Air density corrections are done by keying in air pressure and temperature. The large LC display shows the measuring results in Gy, Gy/min, R, R/min, C or A. MULTIDOS features a high measuring accuracy of better than ± 0.5 % and a very good long-term stability of less than ± 0.5 % per year. An RS232 interface is included as well as the MULTICAL software for calibration purposes.

Features:

Dual channel therapy dosemeter according to IEC 60731 (field class); HV +400 V, only M connecting system available
Twelve channel in-vivo dosemeter for diode measurements (connection box required)
Six channel in-vivo dosemeter for diode measure-ments in rectum and bladder (connection box required)
LINAC constancy check device for homogeneity and symmetry tests (check probe required) 48 channel electrometer for field analysis (LA48 linear array and extender ME48 required)
Complies with safety standard IEC 60601-2-9 as a dosemeter for patient contact
Measures dose and dose rate or charge and current simultaneously

MultiSoft
		The Microsoft Windows based MultiSoft software enables the user to control the multi channel dosemeters VIVODOS and MULTIDOS for in-vivo dosimetry and to store patient data together with associated dose values in a database.

On one hand, the software is designed to operate 12 single semiconductor detectors for skin dose measurement including total body irradiation (TBI). On the other hand, MultiSoft is prepared to control the measurement with intracavitary afterloading probes. MultiSoft stores user-defined probe sets and associated calibration factors. Printouts for each session make it possible to document the treatment in accordance with radiation protection regulations as e.g., the European Council Directive 97/43 on health protection in medical radiology.

Features:

Software for patient dosimetry during radiation therapy with external beams and with afterloading units
Includes modules for in-vivo dosimetry during external beam treatment and during afterloading brachytherapy
Operates up to 12 detectors connected to a multi channel dosemeter
Includes patient data base

TANDEM
		The fast dual channel electrometer TANDEM is suitable to perform field measurements referenced to an ionization chamber or accelerator monitor signal. The measured values can be used as a basis for absolute dose and dose rate measurements in radiation therapy.

In conjunction with the MP3/MP3-S Beam Analyzer, TANDEM is controlled by MEPHYSTO software for fast and accurate beam data acquisition. Using the TanSoft software, TANDEM can also be operated in standalone mode from a PC. TanSoft enables the user to operate the electrometer as a therapy dosemeter in accordance with IEC 60731, provides calibration and correction factors for various detectors and displays the measurement results.

Features:

Therapy dosemeter acc. to IEC 60731
Fast dual-channel electrometer
High resolution for use with small-size ion chambers
Chamber voltage for each channel individually programmable in 50 V-steps, reversible polarity
Display of the current chamber voltage settings
Chamber voltage monitoring
All parameters programmable via RS232
Software calculation of dose and dose rate values

Curiementor® 3 Curiementor® 4
		The CURIEMENTOR 3 and CURIEMENTOR 4 isotope calibrators enable users to measure activity of radioactive isotopes as used for all medical applications in diagnostic and therapeutic nuclear medicine and in intravascular brachytherapy. Great importance has been attached to the design of the instrument to focus on the needs of operators.

The display and keyboard panel with its flat keys are specially designed for intuitive handling and easy cleaning in case of contamination. The measuring results can either be displayed in Bq, Ci or in A. The pressurized well-type ionization chamber has nearly 4π measuring geometry and connects to the display unit by a 1.5 m connection cable, which makes it possible to shield the chamber separately. A radioactive check device is available to check the proper performance of the device regularly. The display unit is supplied with an RS232 interface. A printer can be connected optionally. The printing mode can be set for labels or endless-paper on the CURIEMENTOR display unit.

Features:

Isotope calibrators for radionuclide activity measurement in nuclear medicine and intravascular brachytherapy
Combine modern technology with user friendly, straight-forward operation
Store calibration factors for all isotopes used in nuclear medicine with direct access to five of them Features auto-start, auto-print and auto-reset functions
Comply with IEC 61145

CURIEMENTOR 4:

Includes and exceeds the features of the CURIEMENTOR 3
Direct access to 30 different isotope calibrations
Displays measuring results continuously for isotopes with very short half-value time
Provides data logging (up to 140 measuring results incl. administrative data) and data transfer via an RS232 interface

Afterloading Brachytherapy Measurements

HDR Well-Type Chamber
Multidos
MultiSoft
Afterloading Calibration Phantom
Afterloading Probes
PosiCheck

HDR Well-Type Chamber
		According to AAPM TG-56, the well-type chamber is required for the source strength measurement of radioactive afterloading sources. The recommended calibration factor is the air kerma strength (cGy m²/h). The PTW calibration certificate also includes factors for apparent activity (GBq or Ci) and exposure strength (R m² /h).

Suitable applicator adapters and calibrations are available for the commercial standard afterloading systems. The calibration of the well-type chamber is traceable to the NIST, USA and PTB, Germany. For measurements, the chamber is connected to a sensitive PTW electrometer (UNIDOS, UNIDOS E, MULTIDOS, TANDEM). The well-type chamber is suitable for the calibration of high dose rate (HDR) and pulsed dose rate (PDR) sources such as Ir-192. Calibrations for low dose rate sources (LDR) such as Cs-137 are available upon request.

Features:

Well-type ionization chamber for afterloading source strength measurements
Vented sensitive volume of 200 cm³
Makes it possible to measure the source strength of afterloading sources according to AAPM TG-56
Accommodates suitable applicator adapters for commercial afterloading brachytherapy systems

Afterloading Calibration Phantom
		The Afterloading Calibration Phantom is an acrylic cylinder with a diameter of 20 cm and a height of 12 cm. It is a practical tool for afterloading source strength measurement in a solid state phantom. In addition, it is used for calibration of semiconductor probes for afterloading dosimetry.

For both calibration purposes, the radioactive afterloading source is positioned into the afterloading applicator in the center hole of the phantom by remote control after the reference chamber has been placed into one of the peripheral holes. On a circle with a radius of 8 cm, there are four holes situated 2 cm from the rim of the phantom for detector positioning at 0°, 90°, 180° and 270° by using appropriate adapters. A variety of adapters for applicators, probes and chambers is available.

Features:

Acrylic cylinder phantom for afterloading source strength measurement and for afterloading probe calibration
Makes it possible to measure the source strength of afterloading sources in a phantom
Makes it possible to calibrate afterloading probes against a reference chamber
A variety of adapters for different afterloading applicators, dosimetry probes and reference chambers is available

Afterloading Probes
		For intracavitary dosimetry during gynecological afterloading brachytherapy, the five-fold semiconductor probe is positioned in the patient's rectum and a single detector probe is placed in the bladder to monitor the radiation load to the most radiation sensitive organs automatically.

The five-fold probe has five individual detectors spaced 15 mm apart from each other to increase the chance to measure the maximum dose. The single probe type 9111 with 4.5 mm outer diameter can be inserted into the bladder using a protective sleeve, while the probe type 9113 with 3 mm diameter is used in combination with a catheter. All probes are flexible and have a connection cable of 2.5 m length. The probes connect to the detector connection box, which is linked to a VIVODOS or MULTIDOS multi channel dosemeter, placed in the control room.

Features:

Semiconductor detectors for in-vivo dosimetry during gynecological afterloading treatment
Measure rectum and bladder exposure during intracavitary afterloading brachytherapy
A five-fold rectum probe and two types of single-bladder probes help to protect patients against radiation injuries
Comply with safety standard IEC 60601-2-9

PosiCheck
		With PosiCheck the source position within afterloading applicators can be checked. An applicator can be inserted into one of 7 guide rails depending on its diameter. 3 adjustable stop positions for the applicator are available. By exposing an X-ray film the source position within the afterloading applicator can be determined easily.

Features:

Very easy to handle
Guide rails for applicators with different widths