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Mobile Contour Plotter

Mobile Contour Plotter
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Mobile Contour Plotter.


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Mobile Contour Plotter.

The Mobile Contour Plotter was designed as a simple system to accurately and rapidly transfer the patient’s surface contour to a sheet of paper while the patient is on a simulator table or treatment table.  This contour drawing can then be used on treatment planning computers and in conjunction with CT information for the treatment plan.  It can be a permanent part of the patient’s record.

The contour plotter has a mechanical mechanism which links a drawing pen to a stylus arm.  Upon contact with the body, it translates body contours to an overhead drawing board.  When the finger plunger is depressed, engaging the pen, a continuous plot is drawn as the operator follows the physical contour of the patient.  Marks can be made along the contour to indicate beam entry and laser light locations.

The pen can be any type of pencil, ball point pen, or fine felt tip marker.  The pen is secured in a special holder with a thumb screw so that the pen tip is about 1/2" (1.3 cm) or less from the paper.  The pen to paper engagement is made through a cable by a finger controlled plunger or locked in place by a locking screw.  The finger engaging system is attached to the aluminum stylus arm, allowing easy engagement of the finger plunger while following the contour with the stylus.  The nylon stylus tip is not cold to the touch.  It is designed to permit skin contact even in the close spacing between the table top and the patient.

The drawing board can rotate 360°.  It can lock at any angle, enabling lateral and sagittal contours.  The counterbalanced drawing board is easily adjustable in height to accommodate different patient thicknesses and table heights commonly encountered in radiotherapy departments.

It is recommended that computer plotting paper be used for taking contours due to its paper surface hardness and smoothness.  The paper can be secured to the board with masking tape.

Four 5" (12.8 cm) diameter swivel and locking casters allow the unit to be easily positioned or transported to various areas of the department.

Maintenance Check
Routinely rotate the stylus arm around a point to check the accuracy of the white plastic tip.  There should be no more than a 2 mm wobble.  Check for fraying of the counterweight cable in the post once a year.

• Accepts all types of pens

• Finger plunger engaged pen

• 360° rotatable drawing board

• Counterbalanced drawing board

• Counterbalanced base

Drawing Board Size:
  26 7/8" W x 24" H (68.5 x 61 cm)
Paper Size:  21" x 24" (54 x 61 cm)
Mechanical Tolerance:  2 mm
Drawing Pen:  Pencil, ball point pen, or felt tip marker with a maximum diameter of 13/32" (1 cm)
Base Size:  19" W x 24" L (48.5 x 61 cm)
Height:  82.75" (210 cm)
Weight:  187 lb (85 kg)
Shipping Weight:  230 lb (105 kg)


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