MediCap
®
USB170 User Guide – English
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USB170-UG01-EN-130812-MC
Detailed Explanation of the Anti-Blur Option
To understand the Anti-Blur option, it is first necessary to understand video “fields.” When recording
the objects it is pointed at, a video camera scans a series of horizontal lines. The beam makes two
passes to record one complete image. On the first pass, only every other line of the image is scanned
(the lines in between are left blank). Then on the second pass, the lines in between are filled in. Each
pass is called a “field.” Therefore, two fields make up a complete image (which is called a “frame”).
The process of scanning fields on a video monitor happens so quickly that it is not discernible to the
naked eye. However, when an image is captured and “frozen,” the fact that it is made up of two fields
may become apparent, especially if a moving object is being captured (for example, a beating heart).
If an object is moving fast enough, it will be in one position when the first field of an image is scanned
and will be in another position when the next field of the image is scanned. When the two fields are
combined (the technical term is “interlaced”) to create the captured image, the moving object will
appear blurry or "jaggy" and the frozen image may flicker on the monitor. This effect can also occur if
the camera is moving and the object is still.
To help reduce this type of blurring, you can select the “Anti-Blur” option. This causes only the first
field of each image to be captured. The second field is discarded. Saving just one of the two fields
that make up an image can help eliminate the blurry effect from moving objects, but it also decreases
the resolution of the image since only half of the data for the image is being saved. Therefore, it is
recommended that you normally set Anti-Blur to Off. Only set this option to On if it is necessary to
eliminate a blurry effect from movement.
Patient Information Feature
This feature allows you to enter patient information at the start of each imaging session. The
information can be included in the file names of images, and can be “stamped” on the images. The
information is also stored in a text file in the same folder as the images. In addition, if you have
selected the DICOM image format for your captured images (in the Image Options menu, page 14),
the patient information will be stored in the DICOM header of each image.
Keyboard is Required for Entering Patient Information
Plug a USB keyboard into one of the USB connectors on the back panel. Keyboards from most
manufacturers are compatible.
Setting Up the Patient Information Feature
To turn on this feature, press the
Menu
button on the front panel to display the Main Menu. Then
select “Setup” and select “Patient Information”. The Patient Information Menu will be displayed. Set
“Collect Patient Information” to “Yes.” Then set the following options:
•
Add Info to File Names?
- Allows you to specify what patient information, if any, will be
automatically included in folder and file names. You can select:
o
None
- No patient information will be included in folder and file names
o
Name
- The patient’s name will be included
o
ID
- The patient’s ID will be included
o
Name+ID
- The patient’s name
and
ID will be included
•
Add Info Stamp to Images?
- Allows you to imprint patient information on each image.
You can select
None
(no stamping), or
Upper Left, Upper Right, Lower Left,
or
Lower
Right
(stamps the patient information in the selected area). The following information is
stamped on the image: Patient First and Last Name, Sex, and ID. If you use this option,
you may also want to consider using the Time Stamp option which can be accessed by
going to Main Menu > Setup Menu > Date / Time.
