234 Chapter 16
Figure 16-1. Longitudinal outline of organ showing the start position for planimetry
This method was analyzed in a study by Littrup et al [1] of 20 in vitro models and
100 patients. They found it to be an accurate technique for measuring prostate
volume.
Different stepping units to control the spacing between the sections are available for
use with different transducers.
To use this method to calculate the volume of a particular organ, use the Planimetry
(Ellipse) or Planimetry (Freehand) measurements in the submenu for that organ
volume. The planimetry method is only available for the prostate and adenoma.
To make a planimetry calculation:
1
Record a B-mode image at one end of the organ.
2
Advance the transducer one step.
3
Freeze the image.
4
Click Planimetry (Ellipse) or Planimetry (Freehand) and draw an ellipse or
freehand drawing to outline the organ.
5
Repeat 2 through 4 until you have covered the entire organ.
The Volume is displayed (updated after each measurement is drawn) at the
bottom of the data area to the left of the image.
Reset
To reset the volume, press (long)
[
K
]
.
Empirical Method
The empirical method uses 2 orthogonal B-mode area outline measurements
•
transverse (T-area)
•
longitudinal (L-area)
to calculate volume. It is valid only for calculating bladder volume.
Summary of Contents for Pro Focus 2202
Page 1: ...English BB1279 A June 2005 Pro Focus 2202 Extended User Guide ...
Page 14: ...14 ...
Page 15: ...Part 1 Basics ...
Page 16: ......
Page 32: ...32 Chapter 1 ...
Page 48: ...48 Chapter 2 ...
Page 49: ...Part 2 Working with the Image ...
Page 50: ......
Page 98: ...98 Chapter 5 ...
Page 117: ...Part 3 Imaging Modes ...
Page 118: ......
Page 136: ...136 Chapter 8 ...
Page 152: ...152 Chapter 10 ...
Page 164: ...164 Chapter 12 ...
Page 165: ...Part 4 Setting up and Maintaining Your System ...
Page 166: ......
Page 200: ...200 Chapter 13 ...
Page 208: ...208 Chapter 14 ...
Page 209: ...Part 5 Pro Packages ...
Page 210: ......
Page 288: ...288 Chapter 19 ...
Page 313: ...Part 6 Appendixes ...
Page 314: ......
Page 344: ...344 Appendix C ...