[The contribution of different postprocessing methods for multislice spiral CT in acute pulmonary embolism]

Area of Science:

• Radiology
• Medical Imaging
• Cardiovascular Imaging

Background:

• Acute pulmonary embolism (PE) is a life-threatening condition.
• Multislice spiral CT (MSCT) is a key imaging modality for PE diagnosis.
• Optimizing postprocessing algorithms is crucial for accurate PE detection.

Purpose of the Study:

• To evaluate the diagnostic performance of various postprocessing techniques in MSCT for acute PE.
• To compare the accuracy of different slice thicknesses and reconstruction methods.

Main Methods:

• Prospective study of 48 patients with suspected PE using 8-slice MSCT.
• Radiologists reviewed 2-mm and 5-mm axial slices, MIP images, and multiplanar reformations (MPR).
• ROC analysis was used to compare diagnostic accuracy against a gold standard of 1.25-mm axial slices.

Main Results:

• 2-mm axial slices demonstrated higher diagnostic accuracy than 5-mm slices (Az = 0.988 vs. 0.802).
• Coronal and MPR images also showed excellent accuracy, outperforming 5-mm slices for segmental/subsegmental arteries.
• Maximum intensity projections (MIP) exhibited the lowest diagnostic accuracy.

Conclusions:

• Thin axial slices, coronal, and MPR images are superior for diagnosing acute PE.
• MIP reconstruction is not recommended for accurate diagnosis of pulmonary embolic disease.