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Routine isotropic CT scanning of chest

Publication
CT Marketing Philips Healthcare

Value of coronal and sagittal reformations

Rydberg J, Sandrasegaran K, Tarver R, Frank M, Conces D, and Choplin R.

* Originally published in the January 2007 edition of Investigative Radiology.

 

Objective
We sought to evaluate the usefulness of coronal and sagittal reformations from isotropic chest computed tomography (CT) examinations.

 

Methods
A total of 30 chest CT examinations were reconstructed into two sets of axial source images: 0.9-mm slice width with 0.45-mm reconstruction interval (isotropic) and 4-mm slices with 3-mm reconstruction interval. The isotropic dataset was reformatted into coronal and sagittal stacks with 4-mm slices. Three readers reviewed the image sets with 4-mm slice widths. Coronal and sagittal reformations were compared at the same sitting to axial images for depiction of anatomy and disease in the aorta, pulmonary arteries, hilar regions, mediastinum, lung parenchyma, pleura, diaphragm, thoracic spine, ribs, and trachea. A 5-point scale was used to determine whether non-axial reformations showed anatomy and disease significantly better, somewhat better, same, somewhat worse or significantly worse than equivalent thickness axial source images. A 3-point scale was used to score if non-axial image sets showed no, some, or significant additional information compared with the axial plane regarding the main diagnosis.

 

Results
There was better visualization of the hilar regions, diaphragm, spine, and trachea on the coronal reformations compared with source axial images (P < 0.05). Sagittal reformations scored better than axial source images for aorta, pleura, diaphragm, spine, and ribs (P < 0.05). The coronal and sagittal series showed significant additional information in 11% and 9% of patients, respectively.

 

Conclusion
Radiologists should consider the use of one or both of coronal and sagittal planes in addition to the axial series in routine interpretation of chest CT.

For more information about this publication, check out the PubMed listing for this article.


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Publication
aorta, Body, chest, pulmonary arteries, ribs, thoracic spine, Thorax
 

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