Chapter 6: Safety; Radiation Safety; Accessories - GE HealthCare Revolution EVO EL Instruction Manual

Chapter 6: Safety

Radiation Safety

CTDIvol
As you setup the scan parameters from the ViewEdit screen, the Dose Information area at
the upper right of the scan monitor contains updated dose information. This dose
information is based on a measurement of the CTDI (CT Dose Index), which is the current
standard for CT dosimetry and performance. By using a measurement called CTDIvol, a
single value is provided to estimate the relative dose for an exam.
The CTDIvol is a weighted average measurement in a reference phantom. This dose is
expressed in milliGrays. For additional information on specific CTDIvol doses and their
calculations, refer to your Technical Reference manual.
The DLP is the product of the CTDIvol and the scan length for a group of scans. This number
can be summed over the entire exam to give an estimate of the total dose. The value is
expressed in milliGray centimeters.
The Projected Series DLP shows the DLP that would result from scanning the current group or groups.
The Accumulated Exam DLP displays the total exam DLP up to the current point in time. Scout dose is
included in the DLP totals but is generally a very small part of the exam.
The dose information updates when technique values such as kV, mA, scan time, slice thickness, and
scan field of view are changed.
Dose information is saved a screen save image in Series 999 upon selecting End Exam, Series 997
contains the DICOM Dose Structured Report.

Accessories

Table 6-1: GE Approved Accessories Types and Models
Type
Cardiac Monitor
Respiratory Monitor
External Hard Drive
Flat Table Top
5805442-1EN Rev 2 (Nov. 2023)
© 2023 GE HealthCare
IVY 3100 - B with ethernet
IVY 3150 - B
IVY 3150 - C
IVY 7800
Varian RPM 1.7
Varian RGSC 1.1/2.0
Seagate FreeAgent 1TB USB 2.0
Seagate FreeAgent 2TB USB 2.0/3.0
DIACOR Flat Table Top (E6315JE, E63151JE)
Manufacturer/model
Safety
6-1