Evaluation of normal appendix vermiformis in adults with multidetector computed tomography

Area of Science:

• Radiology
• Medical Imaging
• Gastrointestinal Imaging

Background:

• The appendix vermiformis (AV) is a crucial anatomical structure for diagnosing various abdominal conditions.
• Multidetector computed tomography (MDCT) is a primary imaging modality for evaluating the AV.
• Optimizing MDCT parameters is essential for accurate AV assessment.

Purpose of the Study:

• To evaluate the utility of different contrast enhancement phases, slice thicknesses, and imaging planes for AV detection using MDCT.
• To determine if specific parameters significantly impact the detection rates of the AV.
• To assess the impact of imaging planes on the measured diameter of the AV.

Main Methods:

• Retrospective analysis of 600 patient MDCT examinations.
• Inclusion of unenhanced, arterial, and venous contrast phases.
• Assessment of 0.5 mm, 3 mm, and 5 mm slice thicknesses.
• Evaluation of both axial and coronal imaging planes.

Main Results:

• No significant differences in AV detection rates were observed across varying contrast phases, slice thicknesses, or imaging planes.
• The mean diameter of the AV was significantly smaller when measured in the axial plane (5.93±0.06 mm) compared to the coronal plane (6.18±0.06 mm).

Conclusions:

• MDCT parameters including contrast enhancement phases, slice thicknesses, and imaging planes do not significantly affect the detection rate of the appendix vermiformis.
• Combined interpretation of axial and coronal planes enhances the overall evaluation of the AV on MDCT.
• Standardized protocols for AV diameter measurement considering imaging plane may be beneficial.