Subperiosteal Implant Scanning Protocol

This protocol is to ensure that an accurate 3-D model can be created and used to design a patient fitted superiosteal implant. Review the following information before proceeding with the scanning process. If you have any questions please contact a ProtoMED representative at 303-466-5610 prior to scanning the patient.

To download a copy of the Subperiosteal Implant scanning protocol, right click and save to your desktop.

PRE-SCAN CHECKLIST

• Remove any jewelry that is in the scan area.
• Stabilize the patient with sponges, tape and any other accessories that will not cause injury to the patient or affect the quality of the CT Scan.
  Note: (It is extremely important that the patient does not move or swallow during the scanning process.)
• The referring surgeon will define the area to be scanned either verbally or with a panorex.
• Place the bite jig the dentist has provided into the patients mouth and secure with denture adhesive.
• Place subperiosteal calibration rods on each facial cheek parallel to the tabletop and perpendicular to the x-ray beam. These rods will be used to analyze the scan for movement.
• Position the patient's head so the residual ridge is parallel to the scanning plane.

SCANNING PARAMETERS AXIAL

Area	FOV	Spacing	Slice Thickness	mA	Time
Mandible/Maxilla	20 cm	1 mm	1.5 mm	120-180	2 sec.

SCANNING PARAMETERS HELICAL

Area	FOV	Spacing	Slice Thickness	*mA	Pitch
Mandible/Maxilla	20 cm	N/A	1 mm	120-180	1

*Maximize the mAs without overheating the tube.

PROCEDURE

• Inform the patient when the actual scanning process starts and that they must not move or swallow until advised the scan is complete.
• Take a scout view and locate the first and last slice position. Make sure to start the scan at least two slices below the area of interest and that the last slice is at least two slices above the area of interest.
• Use the Standard Algorithm.
• Gantry Tilt must be set to 0.
• Use an appropriate FOV so the image fills the entire screen but be sure that the desired anatomy is visible.
• After the images are reformatted, perform a sagittal and coronal reconstruction of the rod. The reconstruction of the rod should appear straight with no "jogs" or bends. Be sure to study the rod from several views including an isometric view where any movement will be most obvious. If there are "jogs" or bends the patient has moved and needs to be re-scanned. ProtoMED will reject image data with patient movement.
• After, and only after, the data has been checked for motion and accepted, should the patient be taken off the table.
• Label the tape or disk with patient name, doctor name, scanner type, date of scan, facility name, technician name, and telephone number.
• The data should be archived using the ProtoMED scanning protocol as a guideline.

Scanners Supported

The following is a list of CT scanners currently supported at ProtoMED. Please archive image data (not raw data) onto the appropriate media.

FOR BEST RESULTS, PRINT THIS TABLE FROM THE PROTOCOL DOWNLOAD

Scanner Brand	Image Storage	Scanner Type	Media Type
			Pioneer Optical Disk	Maxoptix Optical Disk	4mm DAT Tape	8mm DAT Tape	CD or PTF
Elscint	Uncompressed	CT Twin					X
		Exel 2400					X
		Twin Flash**		X
GE	Compressed	CT PACE	X	X			X
		CT/i (DICOM Images)		X			X
		Hilight Advantage			X		x
		Hispeed Advantage	X		X		X
		Lightspeed Qx/i (DICOM Images)		X			X
		Prospeed	X	X			X
		Cytec	X	X			X
		Sigma (MR)					X
Hitachi	Uncompressed	Hitachi MRP 7000		X			X
		Hitachi W 950		X			X
		Hitachi W 2000		X			X
Phillips	Uncompressed	Easy Vision		X			X
		Tomoscan CX, CS/S, CX/Q		X			X
		Tomoscan LX, LX/C		X			X
		Tomomscan SR		X			X
		Tomoscan 60/TX, TX		X			X
Picker	Uncompressed	MX Twin Helical (DICOM Images)		X			X
		MX 8000 (DICOM Images)		X			X
		PQ 2000				X	X
		PQ 5000				X	X
		PQ 6000				X	X
Siemens	Uncompressed	Emotion Duo		X			X
		Magnetom (MR)	X				X
		Somatom AR	X				X
		Somatom Balance		X			X
		Somatom DRH	X				X
		Somatom HiQ	X				X
		Somatom Plus	X				X
		Somatom Volume Zoom		X			X
Toshiba	Uncompressed	IS&C Formatted		X			X

If you have a scanner not supported on this list, please call a ProtoMED representative at 303-466-5610 to discuss computability issues.

 

Siemens® is a registered trademark of Siemens AG. General Electric® is a registered trademark of General Electric Company. Picker® is a registered trademark of Picker International, Inc. Toshiba® is a registered trademark of Toshiba Corporation. Elscint® is a registered trademark of Elscint, Inc.