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Doses are for machine setting: 160 KV, 25mA
cGy/Rad
Gray(Gy)
dose
dose
100
1
250
2.5
500
5
1,000
10
1,500
15
2,000
20
2,500
25
3,000
30
3,500
35
4,000
40
6,000
60
10,000
100
12,500
125
17,500
175
20,000
200
1cGy=1 Rad
1Gy=100cGy (100 Rads)
10Gy=1000cGy (1000 Rads)=1 kiloRad
100Gy=10000cGy
Note that some of the times have a notation to "See Deb" that is because if the
machine is continuously ran for more than an hour it will over heat and shut down.
To prevent the machine from overheating we run our sample for 59minutes, let the
machine turn off the X-ray but keep the fans going for 15 minutes, this allows the
200 gallons of internal water to cool down to maintain a lower core temp for the X-
ray tube. Once the cool down is done, simply enter your remaining time and
continue your run.
In most cases, the Dose Chart will provide the irradiation time needed. However,
if a dose is not provided you can use the dose rate to calculate the irradiation
time, as shown in the example below:
Example: Calculating Irradiation Time If Dose is NOT listed on Dose Chart
Suppose you wish to give a specimen a dose of 34 Gy on Level 3. Looking at the Dose Chart,
the dose rate at Level 3 is 1.8 Gy/minute. Dividing dose by the dose rate
(34 ÷ 1.8) gives a total irradiation time of 18.89 minutes.
RAD+(blac
k boran
carbonite
ANIMAL
box)
CAGE
Dose Rate:
Dose Rate:
112 rads
114 rads
Or
Or
1.1Gy/min
1.4Gy/min
54S
55S
2M 14S
2M 11S
4M 28S
4M 23S
8M 56S
8M 47S
13M 25S
13M 09S
17M 51S
17M 33S
22M 19S
21M 56S
26M 48S
26M 19S
31M 15S
30M 42S
35M 42S
35M 06S
53M 35S
52M 32S
see Deb
see Deb
see Deb
see Deb
see Deb
see Deb
see Deb
see Deb
LEVEL 1
LEVEL 2
Dose Rate:
Dose Rate:
101 rads
132 rads
Or
Or
1.0Gy/min
1.3Gy/min
1M 00S
46S
2M 28S
1M 53S
4M 57S
3M 47S
9M 54S
7M 35S
14M 51S
11M 22S
19M48S
15M 9S
24M 45S
18M 57S
29M 42S
22M 43S
34M 39S
26M 32S
39M 36S
30M 18S
59M 24S
45M 27S
see Deb
see Deb
see Deb
see Deb
see Deb
see Deb
see Deb
see Deb
LEVEL 3
LEVEL 4
Dose Rate:
Dose Rate:
180 rads
256 rads
Or
Or
1.8 Gy/min
2.6 Gy/min
34S
22S
1M 23S
59S
2M 47S
1M 57S
5M 33S
3M 55S
8M 19S
5M 51S
11M 06S
7M 49S
13M 53S
9M 46S
16M 40S
11M 43S
19M 27S
13M 41S
22M 14S
15M 38S
33M 19S
23M 27S
55M 34S
39M 04S
1H 09M 27S
48M 51S
see Deb
1H 08M 22S
see Deb
see Deb
LEVEL 5
Dose Rate:
410 rads
Or
4.1 Gy/min
15S
33S
1M 13S
2M 27S
3M 39S
4M 53S
6M 06S
7M 19S
8M 33S
9M 45S
14M 37S
24M 24S
30M 29S
42M 41S
48M 47S
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