17-19 Operators’ Manual
990400 Rev C 2010 May 1
13-2
Conditions of Operation – 8.9 and 26.9 Second Scans
All data was acquired using Radcal Model 9010 Radiation monitor, with 10X5-180
chamber. The data was acquired in concentric circles of radii listed in table below
A Phantom Laboratories head phantom was placed within the beam to act as the
scattering agent. Model SK150 has real bone as the structural component and
proprietary Urethane filler that simulates the response of tissue. The Survey Meter
was placed at a height of 112 cm [44 in] while the mid-point of the beam exit
window was located 118 cm [46.5 in] above the floor.
Locations listed in the table are for 0°, 45°, 90°, 135°, 180°, 225°, 270° and 315°.
Looking out from the system 0° was located directly in front.
This table consists of data gathered with the system operating at 120 kVp(eff),
5 mA with an assumed use and occupancy factor of 1.
Scatter Measurements for 8.9 Second Scans
8.9 second scan using pulsed X-ray: 309 frames, 12 ms pulse width at 5 mA taken
in Diameter 16cm scanning mode. Based on this, the estimated workload is:
10 scans per week yielding a workload of 3.1 mA-min/week
25 scans per week yielding a workload of 7.8 mA-min/week
50 scans per week yielding a workload of 15.5 mA-min/week
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