Notes
Outline
HEAD AND NECK IMAGING UTILIZING MULTI-SLICE HELICAL CT: TECHNIQUES AND APPLICATIONS
KAREN S. CALDEMEYER M.D.
DEPARTMENT OF RADIOLOGY
Multislice Helical CT
Multislice is better than single slice.
Multislice is better than single slice.
Isotropic viewing
Isotropic CT protocol
Comparison of Conventional CT (1.0 mm) and High Resolution (0.5 mm collimation) Spiral CT of the Temporal Bone
OBJECTIVE
METHODS
CONVENTIONAL CT PROTOCOL
SPIRAL CT PROTOCOL
METHODS
METHODS
ANALYSIS
ANALYSIS
RESULTS - Correlation
Between Readers
RESULTS - Comparison Conventional and Spiral CT
RESULTS - Comparison Conventional and Spiral CT
ADVANTAGES
DISADVANTAGES
DIRECT VS. RECON METHODS
Evaluation of Small Structures
Visualization of Low Contrast Structures
Better visualization with diminished contrast difference between structures
Axial MPR of temporal bone – optimal scan plane
Optimal Scan Plane
MULTIPLANAR CAPABILITY
Avoidance of Problems With Direct Coronal Scanning
CONCLUSIONS
Other Head and Neck Uses of Multislice CT
Multiplanar Reconstructions (MPR) vs. Direct Multiplanar CT
MPR of Paranasal Sinuses
MPR of Paranasal Sinuses – Avoidance of Dental Artifact
MPR of Paranasal Sinuses
MPR of Facial Bones
MPR of Facial Bones
MPR of the orbits
MPR of the orbits
MPR of the sella
Dental Scan of Mandible
MPR and 3D of facial bones
MPR and 3D of facial bones
CT Dacryocystography
Virtual endoscopy; bronchoscopy
Faster scanning allows longer coverage to facilitate multiple concurrent examinations utilizing a single contrast bolus
(Head, neck, chest, abdomen and pelvis)
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Conclusions
Notes