CT CPD Series
This series consists of 8 hand-picked topics that are a must-know for any CT radiographer.
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1. Slice Thickness & Interval
2. SFOV & DFOV
3. kVp & mA
5. Image Quality Measurements
6. Iterative Reconstruction
7. IV Contrast Flow & Timing
8. CT Radiation Dose Measurement
Topic 1: Slice Thickness & Interval
Slice thickness can be broken into two categories:
Detector Slice Thickness: This is the z-axis thickness of each individual detector slice within the detector array. The smaller the slice thickness, the better the spatial resolution of the images. Most modern scanners have a slice thickness <1mm.
Reconstructed Slice Thickness: This is the depth of the voxels on a multiplanar reconstructed image. The operator can select any thickness equal to or higher than the detector slice thickness. Each slice makes up an image. The slices are then stacked together to form a series of images which the viewer can scroll through. An analogy for this is cutting a loaf of bread into slices of a certain thickness, then stacking them back together in a loaf and viewing each slice of bread one by one.