RTI Piranha, Reference Manual, Page: 20 / 181

2. Description of the Piranha
Hardware and Specifications
Piranha & QABrowser Reference Manual 2014-06/5.5C
16
Parameters
Tube voltage (kVp)
The average of all samples with compensation for the ripple
(default method)
Time
Irradiation time (Exposure time)
Air kerma (Dose) Measured air kerma (may be called dose or air kerma in this
manual)
Air kerma rate (Dose rate) Average air kerma rate (may be called dose rate or air kerma rate
in this manual)
Total Filtration Estimation of total filtration (for conventional radiography,
fluoroscopy, dental, and CT)
Quick-HVL Estimation of Half Value Layer (for conventional radiography,
fluoroscopy, dental, mammography, and CT)
Half Value Layer Standard HVL using filters for evaluation on radiography,
fluoroscopy, dental, and mammography (all for both pulsed and
conventional)
kV waveform
Waveform is calculated based on detector signals measured after
different thickness of filtration.
Dose rate waveform
Signal measured from radiation detector (solid-state detector).
Measuring range and inaccuracy
Radiography, Fluoroscopy, and Dental
Parameter RQ Range Inaccuracy Resolution
kVp (standard)
W / 3 mm Al R1 35 – 160 kV
±1.5 %
4 digits
(10 or 100 V)
kVp dental
W / 3 mm Al R1 35 – 105 kV
±1.5 % As above
Irradiation time
0.1 ms – 2000 s
1 – 65535 pulses
±1 % or ±0.5 ms
±1 pulse
0.5 ms
1 pulse
Air kerma (Dose) 2
with wide range option
(WR)
0.7 µGy – 1000 Gy
15 nGy – 1000 Gy
(2 µR – 100 kR)
±5 %
–
Air kerma rate 2
(Dose rate)
with wide range option
(WR)
10 µGy/s – 450 mGy/s 3
15 nGy/s – 450 mGy/s 3
1.7 µR/s – 50 R/s
0.1 mR/min – 3000 R/min
±5 % or ±7 nGy/s
±5 % or ±0.8
µR/s
±5 % or ±0.05 mR/min
(for Irr. time >20 ms)
Typ. noise:
3 nGy/s
-Free run
-High Sensitivity
-Low Sensitivity 15 nGy/s – 12 mGy/s
2
150 nGy/s – 12 mGy/s 2
25 µGy/s – 450 mGy/s 2
±5 % or ±7 nGy/s
±5 % or ±7 nGy/s
±5 % or ±0.1
µGy/s
Typ. noise:
3 nGy/s
Estimated total
filtration 1.0 – 90 mm Al
(full kV range) ±10 % or ±0.3 mm
±15 % >50 mm Al
(60
– 120 kV, HF/DC,
>10 µGy/s)
2 digits
(0.1 or 1 mm)
Quick-HVL
1.2 – 14 mm Al 4
(50 – 150 kV)
±10 % or ±0.2 mm
(60 – 120 kV, HF/DC,
>10 µGy/s) 1
3 digits
(0.01 or 0.1 mm)