BenQ T3300 - Display and Report in Different Modes; Operator Control Features; Transducer Surface Temperature Rise

Safety Information
T3300 Diagnostic Ultrasound System | 22 | B00601-010 4/10/17
modes. The index is continuously displayed over a range of 0.1 to 6.0 in increments of 0.01.
Mechanical Index (MI) is continuously displayed over a range of 0.1 to 1.9 in increments of 0.01.
2.9.3 Display and Report in Different Modes
2.9.3.1 For B-Mode
Display and report only MI and TIS
2.9.3.2 For Color Mode
Display and report only MI and TIS
2.9.3.3 For Doppler Mode
Display and report MI, TIS and TIB
Below is a simple guideline for the operator when TI exceeds one limit exposure time to 4
(6-TI)
minutes
based on the‘National Council on Radiation Protection. Exposure Criteria for Medical Diagnostic
Ultrasound: I. Criteria Based on Thermal Mechanisms. Report No.113 1992’.
2.9.4 Operator Control Features
The operator should be aware that certain operator controls may affect the acoustic output. It is
recommended to use the default (or lowest) output power setting and compensate using Gain
control to acquire an image. Other than the output power setting in the Soft Menu, which has the
most direct impact on the power; the PRF (Pulse Repetition Frequency), image sector size, frame
rate, depth, and focal position also slightly affect the output power. The default setting is normally
around 70%, occasionally 90%, of the allowable power, depending on the exam type.
2.10 Transducer Surface Temperature Rise
The table below lists the measured surface temperature rise from ambient (23°C ± 3°C) of
transducers used on the system. The temperatures were measured in accordance with EN 60601-2-
37 cl.201.11 and cl.201.13 with controls and settings positioned to give maximum temperatures.
Table 12 Transducer surface temperature rise
Test External use (°C)
P42B6 C62B L154BH
Simulated use 1.4 1.5
Still air 3.6 7.3 6.5