Urology Pro Package 235
The calculation formula for this method is based on research by Rageth and Langer
[2], in which they applied the empirical method in more than 200 cases studied. They
found this approach to be a suitable method for routine clinical practice.
NOTE:
When you outline the bladder for the empirical method, the outlines must
represent the maximum areas of the bladder in the transverse plane (AT) and
longitudinal plane (AL).
To make an empirical volume calculation:
1
Click Empirical and draw an ellipse to outline the organ.
2
From the same transducer position, record another image at right angles to the
first.
3
Click in the other part of the split screen and draw an ellipse to outline the organ.
The Volume is displayed at the bottom of the data area to the left of the image.
Calculating PSAD
To calculate the PSAD (Prostate Specific Antigen Density), you calculate the
volume of the prostate and type in a value for the PSA (Prostate Specific Antigen).
The PSA is divided by the volume to give the PSAD. This method is discussed in an
article by Benson et al [3] in which the method was used in a study of over 500
patients.
To calculate PSAD:
1
Click PSAD in the Prostate Volume measurement submenu.
If you have not entered the PSA value in the Patient window, you are prompted
to enter it. Type in the correct value.
2
Calculate the prostate volume using HWL. Ellipse or planimetry.
The PSAD appears under Measurements to the left of the image.
If volume
already
calculated
You can also click PSAD after you have calculated the prostate volume. You will be
prompted for the PSA value if you have not already entered it.
Urology Calculation Formulas
The following methods for estimating volume are available:
•
Height
×
Width
×
Length x factor
•
Planimetry
•
Empirical method (valid only for the bladder).
There is also a method for calculating PSAD.
The formulas for the volume calculations in the Urology Pro Package are shown in
Table 16-5. The variables in the formulas are defined in Table 16-6.
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 ...