TO R N I E R
BLUEPRINT
™
3D Planning + PSI
SC AN PROTOCOL V1.5
Contents
2
3
Introduction
3
Patient preparation
3
Scanning instructions
4
Image instructions
5
Scanning parameters
6
Technical instructions
BLUEPRINT™ 3D Planning Software
Scan Protocol v1.5
Scan Protocol
Introduction
This document describes the guidelines for a Shoulder CT-Scan to be
processed by BLUEPRINT™ 3D Planning Software. Following this scanning
protocol will optimize the likelihood of successful scan reconstruction in
BLUEPRINT™ 3D Planning Software.
Note: Please contact the helpline if you require further information.
Figure 1: Artifacts generated
by metallic implants
Patient Preparation
» Verify that metal is not present within the scanned portion of the operative
side (Figure 1)
Note: Pacemakers, dental and cervical hardware can cause artifact if too close to the
GlenoHumeral joint. If artifact too intense, do not scan.
» Do NOT use contrast material
» Place the patient supine on the scanner table, Humerus along the trunk
(Figure 2)
Figure 2: Position of the
patient in the machine
Note: Position must be craniocaudal oriented (head first) and iso-centered, with the hand in a
neutral position.
» It is strongly recommended to place a sponge or a small pillow between
humerus and trunk
Scanning instructions
» No gantry tilt
» Limit the field of view to the desired/operative shoulder
Figure 3: Example of
incomplete projections
» Avoid incomplete projections of soft-tissue wrap by having all shoulder softtissue within the field of view (causes pseudo-metal artifact) (Figure 3)
» It is strongly recommended to perform a full scan of the scapula (Figure 4)
Note: Scan must include several slices about the AC joint and several slices (around 1 cm)
below the inferior angle.
» All slices must have the same field of view and the same slice spacing
» DO NOT use auto-mA setting
Figure 4: Full scan of the scapula
BLUEPRINT™ 3D Planning Software
Scan Protocol v1.5
3
Images instructions
» Use only axial images, no other reconstructions or reformations in different
planes (sagittal or coronal)
» The DICOM file format is defined in the Transfer Syntax (0002, 0010) Tag
field, the supported formats are the following:
Uncompressed
Transfer Syntax UID
Description
1.2.840.10008.1.2
Implicit VR – Little Endian
1.2.840.10008.1.2.1
Explicit VR – Little Endian
1.2.840.10008.1.2.2
Explicit VR – Big Endian
Lossless compressed
Transfer Syntax UID
Description
1.2.840.10008.1.2.5
RLE Lossless
1.2.840.10008.1.2.4.57
JPEG Lossless, Non-Hierarchical (Process 14)
1.2.840.10008.1.2.4.70
JPEG Lossless, Hierarchical, First-Order Prediction
1.2.840.10008.1.2.4.90
JPEG 2000 Image Compression (Lossless Only)
Lossy compressed
4
Transfer Syntax UID
Description
1.2.840.10008.1.2.4.91
JPEG 2000 Image Compression
BLUEPRINT™ 3D Planning Software
Scan Protocol v1.5
Scanning parameters
» Recommended parameters
Parameter
Recommended
Modality
CT
Kernel / Algorithm
Bone or Bone+
kVp
120 or 140 kVp
mA
Manual 240 mA
DO NOT use auto-mA
Slice Increment
1.2 mm
Image Thickness
- Detector Coverage should be maximum
- Helical Thickness 0.625 mm or 1.25 mm
- Pitch 0.9 or less
- Rotation time 1 sec or less
Exposure time
1000 ms
Note: Using the manual-mA setting of 240 mA will provide compatible images. Not doing so
will produce images that are incompatible with BLUEPRINT™ 3D Planning Software.
» Display Field Of View (DFOV)
Parameter
Recommended
DFOV (axial plane) (Figure 5)
Please include the entire scapula
25 cm or no more 32 cm
DFOV (frontal plane) (Figure 6)
Please include the entire scapula
More than 10 cm
Matrix size
512 x 512
Figure 5: DFOV (axial plane)
BLUEPRINT™ 3D Planning Software
Figure 6: DFOV (frontal plane)
Scan Protocol v1.5
5
Technical Instructions
» GE HEALTHCARE
In order to define the recommended mA, please follow the next steps:
1. Click on mA button
2. Set manual-mA to 240 mA and dose reduction 0%
3. Set the desired slice thickness for helical CT by clicking on Slice Thickness:
- Set the detector coverage to maximum depending on each machine
- Set the helical thickness to 0.625 mm or no more than 1.25 mm
- Set the pitch to 0.9 or less
- Set the rotation time to 1.0 sec
» SIEMENS
This example works for Somatom Sensation 64 but the user interface is the
same in most of Siemens systems. You have two main tabs to configure the
scan protocol on Siemens machines:
1. On the Reconstruction tab:
- Set the Kernel/Algorithm to Bone 70s, sharp or very sharp
- Set the window on Bone
- Set the reconstruction increment to 0.6 mm or less
2. On the Scan tab:
- Set the quality ref mAs to 300 mAs
- Set the kVp to 120 or 140 kVp
- Set the rotation time to 1.0 sec
- Set the slice thickness to 1.25 mm or less
- Set the pitch to 0.9 or less
» OTHER SCANNER BRANDS
For any other brand of CT scan machine please refer to the standard
recommendations in pages 4, 5 and 6.
6
BLUEPRINT™ 3D Planning Software
Scan Protocol v1.5
Notes
BLUEPRINT™ 3D Planning Software
Scan Protocol v1.5
7
BLUEPRINT™ 3D PLANNING SOFTWARE HELPLINE
Email: [email protected]
Phone: 855.378.1459
1023 Cherry Road
Memphis, TN 38117
800 238 7117
901 867 9971
www.wright.com
10801 Nesbitt Avenue South
Bloomington, MN 55437
888 867 6437
952 426 7600
www.tornier.com
Proper surgical procedures and techniques are the responsibility of the medical professional. This material is furnished for information
purposes only. Each surgeon must evaluate the appropriateness of the material based on his or her personal medical training and
experience. Prior to use of any Tornier implant system, the surgeon should refer to the product package insert for complete warnings,
precautions, indications, contraindications, and adverse effects. Package inserts are also available by contacting Wright.
Contact information can be found in this document and the package insert.
and ® denote Trademarks and Registered Trademarks of Wright Medical Group N.V. or its affiliates.
©2016 Wright Medical Group N.V. or its affiliates. All Rights Reserved.
™
CAW-7230 Rev B ECN 161103 05-Aug-2016