The 2640 is built for extremely fast measurements. This allows the best judgement between patient exposure and diagnostic image quality to be consistently achieved. Routine monitoring also enables the success of patient dose reduction programmes to be demonstrated.
Product Detail
The 2640 DAPmeter measures the total patient dose absorbed over an exposed area during a fluoroscopic or X-ray examination in real time. The instrument is connected to 1 or 2 ionisation chambers, placed in the beam. Four arrow keys enable easy setup via menu-driven software. The Dose Area Product (DAP) and the cumulative exposure time of each channel are displayed.
Key Features:
Transparent chambers do not affect beam alignment cross-hairs
Vented chambers provided with automatic air temperature and pressure correction
Chamber attenuation is less than 0.5 mm Al for HVL of 3.1 mm Al
Chamber calibration factor is saved in memory
RS-232 interface to computer or printer
Database software for patient records and DAP data
Clear and Informative Menus
Designed for the daily routine of the X-ray department, the DAPmeter 2640A measures the Dose Area Product from one or two X-ray beams, using virtually transparent chambers to maintain accurate beam alignment.
After switch-on, the DAPmeter automatically zeroes itself and within 60 seconds it is ready to measure. The DAPmeter's usual display is Menu 1, where elapsed time and accumulated dose area product, corrected for temperature and pressure, are shown. Cursor and Enter keys on the front panel are used to edit and move between menus.
Menu 1 - Measure Mode
In routine use, the DAP values are displayed on the screen. The Reset key is used to reset both channels and can generate a printout.
1: Measure
Channel 1 1.234 (Gy.cm2)
0
(s)
Channel 2 2.345 (Gy.cm2)
0
(s)
Menu 2 - Environment
Displays all the necessary environmental factors: time, date, temperature and pressure values monitored by the built-in sensors.
2: Environment
Date
Time
Date Format
Temperature
Pressure
13/02/99
13:57:58
USA
20.6°C
1019 mb
To prevent unauthorized adjustments, a security code is required to enter menus 3, 4 and 5.
Menu 3 - Correction Factors
Shows the calibration factors. Measured Dose Area Products are corrected by these values before being displayed. The temperature and pressure measurements may also be used to correct the Dose Area Product.
3: General
Ch1 Cal Factor
Ch2 Cal Factor
Auto Reset
Temp Offset
Pres Factor
Security Code
0.972
1.038
OFF
-7.1°C
1.097
234
Menu 4 - Serial setup
Displays the RS232 printer/computer link mode.
4: RS232
No of printouts
Baud Rate
Parity
Link Mode
1
9600
None
PRN
Menu 5 - Ambient Correction
"Ambient Correction" allows you to enable or disable the automatic temperature and pressure corrections. Units of Gy.cm2 or kR.cm2 can be selected.
5: Ambient
Correction
Temperature
Pressure
Gy.cm2
kR.cm2
On
Off
On
Off
Chamber Quality and Performance
Virtually transparent to preserve accurate beam alignment
Chamber filtration effect: 0.5mm Al
Fully electrically guarded
Efficient ion collection for easy cleaning or transfer to another X-ray set
Available chambers
2641A:
180mm x 180mm maximum beam area.
2642A:
134mm x 134mm maximum beam area.
Data Logging Software (Optional)
Utilizing the 2640 DAPmeter and recording the Dose Area Product in diagnostic X-ray examinations offers a clear and systematic route to patient dose reduction during fluoroscopic and radiographic examinations.
Online patient details, examination histories and Dose Area Products
Instant labels for log books and record cards, complete with hospital and room number
Suitable for participation in dose reduction programs
Creating a patient record: Simply enter details of patient and examination type on screen.
With the optional remote printer, the information you need is printed:
Date and time, Dose Area Product and exposure time for channels 1 & 2, units of Gy.cm2 or kR.cm2
Performing an examination: The Dose Area Product measurement begins when "Start Examination" is selected, and the patient record is then automatically stored..
With the data logging software, you can:
Print patient records
Record measurements
Store the data on disk
Print out results
Create a patient database
Continually log radiation exposures
Quickly, easily and accurately evaluate patient dose area products
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